Yamaha P-1250 monaural power amp

Yamaha P-series Professional Power Amplifiers P1250 

The power amplifier shall have an input sensitivity of +4 dBn, requiring no more than 1,23 volts RMS to be driven to rated output into a 4 ohm load. The maximum continuous average sine wave power output over a 20 Hz to 20 kHz bandwidth for a single channel shall be (150 watts, 250 watts) onto a minimum 4 ohm load impedance, or (100 watts, 170 watts) into an 8 ohm load with no more than 0,05% thd.

Total harmonic Distortion measured at half rated power, from 20 Hz to 20 kHz, shall be no more than 0,01% . maximum intermodulation distortion, measured using the SMPTE method of 60 Hz and 7 kHz tones mixed in a 4:1 ratio, shall be no more than 0,01% measured at rated power output. Power bandwidth shall be no less than 10 Hz to 50 kHz at half rated power output, and frequency response shall be +0 dB, -1 dB from 10 Hz to 50 kHz. s/n as established by comparing the maximum output with signal to the minimum output noise with a shorted input, shall be no less than 110 dB measured with a -6 dB/octave low pass filter at 12,47 kHz (equal to a “brick wall” filter at 20 kHz), and no less than 115 dB measured with an IHF “A” weighting network. Residual output noise, measured with the input attenuator set at infinite attenuation, shall be no more than _80 dBm with a -6 dB/octave low pass filter at 12,47 kHz, or no more than -90 dBm with an IHF “A” weighting network. Slew rate shall be at least 50 volts per microsecond, full swing.

The amplifier input(s) shall be equipped with both an XLR-3 type connector and a pair of Tip/Ring/Sleeve ¼-inch phone jacks, wired in parallel. The input shall be of the electronically balanced, differential type, with an input impedance of no less than 15 k ohm presented to either balanced or unbalanced sources. The amplifier output(s) shall be equipped with a set of 5-way binding posts for positive, high-current connections, and with parallel-wired Tip/Sleeve 1-4-inch phone jacks for wiring convenience.

Input level shall be adjustable by means of (one or two) detented input attenuator(s) calibrated in 32 steps of from zero to infinite attenuation. The attenuator(s) shall be recessed, and shall be designed so as to be easily adjustable by hand, without any tools. To avoid casual or accidental setting changes, a security cover for the attenuator(s) shall also be provided.

Protection for the speaker load shall be established by means of an output-disconnect relay that is timed out when power is first applied to avoid transients from reaching the load, and that immediately disconnects the load and turns on a front-panel protection indicator in the event that more than 2 volts DC appears across the output. Further protection for the amplifier and load shall be provided by VI limiting circuitry which automatically reduces the power output in the event the load impedance is below 2 ohm for a single channel, (4 ohm for a dual-channel model in bridged mono configuration). The amplifier shall also include a full-time 2-speed fan which operates at high speed under severe thermal stress, and automatically resets to a lower speed as appropriate. Cooling air shall be drawn through a removable cleanable front-panel filter, and exhausted via ports in the tip and side panels of the amplifier.

Signal level indication (per each channel on dual-channel models) shall be provided by two LEDs, one of which turns on when the output THD is equal to or above 1%, which would indicate the onset of clipping, and one which turns on when the output level is equal to or greater than 2 volts RMS, which would indicate the presence of program signal.

Specifications P1250

Power Output Level (THD =0,05%)

20 Hz – 20 kHz :  170 W (at 8 Ω ); 250 W (at 4 Ω )

1 kHz:  185 W (at 8 Ω ); 265 W (at 4 Ω )

Frequency Response:   10 Hz – 50,000 Hz (8 Ω ) +0 -1 dB

Power Bandwidth (THD = 0,1%)

10 Hz to 100,000 Hz (85 W) at 8 ohm

10 Hz to 100,000 Hz (125 W) at 4 ohm

Total harmonic Distortion: 

Less than 0,007% ( 85 W, 20 Hz – 20 kHz, 8 Ω )

Less than 0,003% ( 85 W, 1 kHz, 8 Ω )

Less than 0,005% ( 125 W, 1 kHz, 4 Ω )

Less than 0,01% ( 1255 W, 20 Hz – 20 kHz, 4 Ω )

Intermodulation  Distortion (60 Hz : 7 kHz = 4:1)

less than 0,005% (85 W, 8 Ω )

less than 0,01% (125 W, 4 Ω )

Damping Factor

Better than 110 (1 kHz , 8 Ω ); >55 (1 kHz  , 4 Ω  )

Signal-to-Noise-Ratio: 

Better than 110 dB (Input Short; 12,47 kHz , -6 dB/octave LPF)

Better than 115 dB (Input Short, IHF A Network)

Slew Rate

± 50 V/µsec (8 Ω , Full Swing)

Sensitivity :  +4 dB (1,23 V rms) for nominal output (4 Ω  load)

Voltage Gain:  28,3 dB

Input Impedance:  better than  15 k Ω , Balanced or Unbalanced (Att. Max)

Residual Noise (Input Att. Minimum)

Less than -80 dBm, -6 dB/oct. LPF at 12,47 kHz 

Less than -90 dBm, IHF A network

Indicators

Signal:  Green LED(-20 Hz to 20 kHz, Vo> 2 V

Clipping:  Red LED Total harmonic Distortion: better than 1%

Protection: Red LED (during the protection or muting is on)

Pilot:  Red LED Power ON

Protection Circuits

Muting:  6 ± 2sec After Power ON

DC Sense:  DC ± 2 V Ouptut Voltage

Thermal:  better than 85°C Heat sink temperature

PC Limiter:  ON RL less than 2 Ω 

FAN Circuit

Better than 60°C High speed run, Heat sink temperature

Less than 45°C Restoration of a low speed run, Heat sink temperature

Front Controls:  32 step Input Attenuator (0 to -20 dB in 1 dB steps, -20 to -30 dB in 2 dB steps, then -33, -37, -42, -50, -60 dB, and infinite attenuation

Push ON/Push Off Power Switch

Power Requirements

220/240 V AC 50/60 Hz (General model) 120 V AC, 60 Hz (US and Canada models)

Power Consumption

600 W (General mode); 400 W, 450 VA (US and Canada model)

Dimensions (W x H x D):  480 x 132 x 423 MM (18-7/8” x 5-1/4” x 16-5/8”)

Weight:  15 kg (33 lbs)

 

Yamaha P-1150 monaural power amp

Yamaha P-series Professional Power Amplifiers P1150 

The power amplifier shall have an input sensitivity of +4 dBn, requiring no more than 1,23 volts RMS to be driven to rated output into a 4 ohm load. The maximum continuous average sine wave power output over a 20 Hz to 20 kHz bandwidth for a single channel shall be (150 watts, 250 watts) onto a minimum 4 ohm load impedance, or (100 watts, 170 watts) into an 8 ohm load with no more than 0,05% thd.

Total harmonic Distortion measured at half rated power, from 20 Hz to 20 kHz, shall be no more than 0,01% . maximum intermodulation distortion, measured using the SMPTE method of 60 Hz and 7 kHz tones mixed in a 4:1 ratio, shall be no more than 0,01% measured at rated power output. Power bandwidth shall be no less than 10 Hz to 50 kHz at half rated power output, and frequency response shall be +0 dB, -1 dB from 10 Hz to 50 kHz. s/n as established by comparing the maximum output with signal to the minimum output noise with a shorted input, shall be no less than 110 dB measured with a -6 dB/octave low pass filter at 12,47 kHz (equal to a “brick wall” filter at 20 kHz), and no less than 115 dB measured with an IHF “A” weighting network. Residual output noise, measured with the input attenuator set at infinite attenuation, shall be no more than _80 dBm with a -6 dB/octave low pass filter at 12,47 kHz, or no more than -90 dBm with an IHF “A” weighting network. Slew rate shall be at least 50 volts per microsecond, full swing.

The amplifier input(s) shall be equipped with both an XLR-3 type connector and a pair of Tip/Ring/Sleeve ¼-inch phone jacks, wired in parallel. The input shall be of the electronically balanced, differential type, with an input impedance of no less than 15 k ohm presented to either balanced or unbalanced sources. The amplifier output(s) shall be equipped with a set of 5-way binding posts for positive, high-current connections, and with parallel-wired Tip/Sleeve 1-4-inch phone jacks for wiring convenience.

Input level shall be adjustable by means of (one or two) detented input attenuator(s) calibrated in 32 steps of from zero to infinite attenuation. The attenuator(s) shall be recessed, and shall be designed so as to be easily adjustable by hand, without any tools. To avoid casual or accidental setting changes, a security cover for the attenuator(s) shall also be provided.

Protection for the speaker load shall be established by means of an output-disconnect relay that is timed out when power is first applied to avoid transients from reaching the load, and that immediately disconnects the load and turns on a front-panel protection indicator in the event that more than 2 volts DC appears across the output. Further protection for the amplifier and load shall be provided by VI limiting circuitry which automatically reduces the power output in the event the load impedance is below 2 ohm for a single channel, (4 ohm for a dual-channel model in bridged mono configuration). The amplifier shall also include a full-time 2-speed fan which operates at high speed under severe thermal stress, and automatically resets to a lower speed as appropriate. Cooling air shall be drawn through a removable cleanable front-panel filter, and exhausted via ports in the tip and side panels of the amplifier.

Signal level indication (per each channel on dual-channel models) shall be provided by two LEDs, one of which turns on when the output THD is equal to or above 1%, which would indicate the onset of clipping, and one which turns on when the output level is equal to or greater than 2 volts RMS, which would indicate the presence of program signal.

Specifications P1150

Power Output Level (THD =0,05%)

20 Hz – 20 kHz :  100 W (at 8 ohm); 150 W (at 4 Ω )

1 kHz:  105 W (at 8 Ω ); 165 W (at 4 Ω )

fr:  10 Hz – 50,000 Hz (8 Ω ) +0 -1 dB

Power Bandwidth (THD <=0,1%)

10 Hz to 100,000 Hz (55 W) at 8 Ω 

10 Hz to 100,000 Hz (75 W) at 4 Ω 

Total harmonic Distortion: 

Less than 0,007% ( 55 W, 20 Hz – 20 kHz, 8 Ω )

Less than 0,003% ( 55 W, 1 kHz, 8 Ω )

Less than 0,005% ( 75 W, 1 kHz, 4 Ω )

Less than 0,01% ( 75 W, 20 Hz – 20 kHz, 4 Ω )

Intermodulation  Distortion (60 Hz : 7 kHz = 4:1)

less than 0,005% (55 W, 8 Ω )

less than 0,01% (75 W, 4 Ω )

Damping Factor

Better than 110 (1 kHz , 8 Ω ); better than 55 (1 kHz  , 4 Ω )

Signal-to-Noise-Ratio: 

Better than 110 dB (Input Short; 12,47 kh z, -6 dB/octave LPF)

Better than 115 dB (Input Short, IHF A Network)

Slew Rate

± 50 V/µsec  (8 Ω , Full Swing)

Sensitivity :  +4 dB (1,23 V rms) for nominal output (4 Ω  load)

Voltage Gain:  26,0 dB

Input Impedance:  better than  15 k Ω , Balanced or Unbalanced (Att. Max)

Residual Noise (Input Att. Minimum)

Less than -80 dBm, -6 dB/oct. LPF at 12,47 kHz

Less than -90 dBm, IHF A network

Indicators

Signal:  Green LED(-20 Hz to 20 kHz, Vo better than  2 V

Clipping:  Red LED Total harmonic Distortion: better than 1%

Protection: Red LED (during the protection or muting is on)

Pilot:  Red LED Power ON

Protection Circuits

Muting:  6 ± 2sec After Power ON

DC Sense:  DC ± 2 V Ouptut Voltage

Thermal:  better than 85°C Heat sink temperature

PC Limiter:  ON RL less than 2 Ω 

FAN Circuit

Better than 60°C High speed run, Heat sink temperature

Less than 45°C Restoration of a low speed run, Heat sink temperature

Front Controls:  32 step Input Attenuator (0 to -20 dB in 1 dB steps, -20 to -30 dB in 2 dB steps, then -33, -37, -42, -50, -60 dB, and infinite attenuation

Push ON/Push Off Power Switch

Power Requirements

220/240 V AC 50/60 Hz (General model) 120 V AC, 60 Hz (US and Canada models)

Power Consumption

400 W (General mode); 250 W, 300 VA (US and Canada model)

dimensions (W x H x D):  480 x 132 x 423 MM (18-7/8” x 5-1/4” x 16-5/8”)

Weight:  13 kg (28,6 lbs)

 

Yamaha A-420 amplifier

Center Defeat Bass and Treble Tone Control

The bass and treble controls provided on A-420 are specially designed with a center defeat position. When set to their center positions, tone control response is perfectly flat, with no influence on the original signal. When tuned for either a boost or cut, they provide smooth, accurate response over a conveniently wide range.

Subsonic Filter

A switchable subsonic filter is provided on the A-420, a subsonic filter is built into the phono equalizer amplifier stage, providing the same performance benefits automatically, whenever the amplifier is reproducing a phono source.

Independent Speaker A/B Selectors

The A-420 provide rear panel connectors and front panel selectors for two separate pairs of speakers. They can be driven independently or simultaneously, allowing you to drive two remotely located speaker pairs together, or to drive a dual speaker pair setup in a single listening environment, for more listening flexibility.

Specifications

Minimum RMS Output Power per Channel:  50 Watts (8 Ω ) from 20 to 20,000 Hz at no more than 0,015% thd

Dynamic Power per Channel (IHF) :  85 W (8 Ω ), 115 W (4 Ω ), 120 W (2 Ω )

Power Bandwidth (Half Rated Power, 8 Ω ):  10 to 50,000 Hz  (0,05% THD)

Damping Factor (1 kHz, 8 Ω ):  no more than 50

Input Sensitivity/Impedance

Phono MC :  160 µV/100 Ω 

Phono MM :  2,5 mV/47 k Ω  

CD, Video, Tape :  150 mV/30 k Ω 

Maximum Input Level

Phono MC :  11 mV (0,02% THD)

Phono MM :  155 mV (0,02% THD)

Output Level /Impedance

Rec Out :  150 mV/600 Ω 

Headphone Jack Rated Output/Impedance (8 Ω ):  0,7 V (0,015% THD)/220 Ω 

Frequency Response: 

CD, Video, Tape :  20 to 20,000 Hz +0 dB -0,5 dB

RIAA Equalization Deviation (20 to 20,000 Hz)

Phono MC RIAA :  ± 0,8 dB 

Phono MM RIAA :  ± 0,5 dB 

Total harmonic Distortion: 

Phono MC to Rec Out (3 V) :  0,01%

Phono MM to Rec Out (3 V) :  0,007%

CD, Video, Tape  to Sp Out :  0,01%

Intermodulation Distortion (8 Ω )

CD, Video, Tape :  0,005% (1 W), 0,01% (half Rated Power)

Signal-to-Noise-Ratio:  (IHF-A Network)

Phono MC (500 µV  input Shorted) :  74 dB 

Phono MM (5 mV  input Shorted) :  90 dB 

CD, Video, Tape (input Shorted) :  100 dB 

Signal-to-Noise-Ratio:  (new IHF)

Phono MC (500 µV  input Shorted) :  72 dB 

Phono MM (5 mV  input Shorted) :  76 dB 

CD, Video, Tape (input Shorted) :  85 dB 

Tone Controls

Bass Boost/Cut :  ± 10 dB at 20 Hz

Turnover Frequency :  350 Hz 

Treble Boost/Cut :  ± 10 dB at 20 kHz

Turnover Frequency :  3,5 kHz

Loudness Control (Level Related Equalization):  -20 dB

Dimensions (W x H x D):  435 x 112 x 327 mm (17-1/8” x 4-3/8” x 12-7/8”)

Weight:  5,9 kg (13 lbs)

 

Yamaha A-520 amplifier

Yamaha A-520 amplifier

Rec Out Selector with Tape Copy Function

The Yamaha Rec Out Selector is another extremely useful feature which greatly extends the source control capability of the A-520. It allows you to record one source, selected by the Rec Out Selector, while monitoring another completely independent source selected by a front panel input selector. And the Rec Out Selector also allows you to copy tapes between the two tape inputs, in either direction, eliminating the need for complicated re-connections when dubbing tapes between two decks.

Accessory Output Loop

The growing use of graphic equalizers and sound processors in an audio system presents the need for extra connection capability, and a simpler way to make the right connections. The A-520 is prepared for this need with a rear panel accessory output loop. Serving the same role as a tape loop which would otherwise have to be used, it routes a line level signal out to an external graphic equalizer or sound processor and back in to the amplifier. This frees both existing tape loops provided on the amplifier for their intended purpose, and allows easy connection of an external component without interfering with existing rear panel input/output connections.

Heavy Duty Speaker Connection Terminals

the rear panel speaker connection terminals on the A-520 are specially designed to accept speaker cable of maximum thickness with a simple, solid connection. This allows the use of the heaviest gauge speaker cable for maximum signal transmission purity without having to cut or squeeze the cables in, and provides a solid electrical connection that can’t be pulled out. Normal gauge speaker cables can also be used with the same terminals.

Center Defeat Bass and Treble Tone Control

The  bass and treble controls provided on A-520 are specially designed with a center defeat position. When set to their center positions, tone control response is perfectly flat, with no influence on the original signal. When tuned for either a boost or cut, they provide smooth, accurate response over a conveniently wide range.

Subsonic Filter

A  switchable subsonic filter is provided on the A-520 front panel, allowing you to filter subsonic frequency content such as turntable rumble out of the signal, thereby protecting both amp and speakers and preventing needless power drain.

Independent Speaker A/B Selectors

The  A-520 provide rear panel connectors and front panel selectors for two separate pairs of speakers. They can be driven independently or simultaneously, allowing you to drive two remotely located speaker pairs together, or to drive a dual speaker pair setup in a single listening environment, for more listening flexibility.

Specifications

Minimum RMS Output Power per Channel:  75 Watts (8 ohm) from 20 to 20,000 Hz at no more than 0,01% thd

Dynamic Power per Channel (IHF) :  97 W (8 ohm), 169 W (4 ohm), 160 W (2 ohm)

Power Bandwidth (Half Rated Power, 8 ohm):  10 to 50,000 Hz  (0,03% THD)

Damping Factor (1 kHz, 8 ohm):  no more than 50

Input Sensitivity/Impedance

Phono MC :  160 µV /220 ohm

Phono MM :  2,5 mV /47 k ohmn

CD, Video, Tape :  150 mV/47 k ohm

Maximum Input Level

Phono MC :  10 mV (0,01% THD)

Phono MM :  150 mV (0,01% THD)

Output Level /Impedance

Rec Out :  150 mV/470 ohm

Headphone Jack Rated Output/Impedance (8 ohm):  0,7 V (0,01% THD)/270 ohm

Frequency Response: 

CD, Video, Tape :  20 to 20,000 Hz +0dB -0,5 dB

RIAA Equalization Deviation (20 to 20,000 Hz)

Phono MC RIAA :  ± 0,3 dB 

Phono MM RIAA :  ± 0,2 dB 

Total harmonic Distortion: 

Phono MC to Rec Out (3 V) :  0,007%

Phono MM to Rec Out (3 V) :  0,003%

CD, Video, Tape  to Sp Out :  0,005%

Intermodulation Distortion (8 ohm)

CD, Video, Tape :  0,005% (1 W), 0,01% (half Rated Power)

Signal-to-Noise-Ratio:  (IHF-A Network)

Phono MC (500 µV  input Shorted) :  75 dB 

Phono MM (5 mV  input Shorted) :  92 dB 

CD, Video, Tape (input Shorted) :  100 dB 

Signal-to-Noise-Ratio:  (new IHF)

Phono MC (500 µV  input Shorted) :  74 dB 

Phono MM (5 mV  input Shorted) :  78 dB 

CD, Video, Tape (input Shorted) :  84 dB 

Tone Controls

Bass Boost/Cut :  ± 10 dB at 20 Hz

Turnover Frequency :  350 Hz 

Treble Boost/Cut :  ± 10 dB at 20 kHz

Turnover Frequency :  3,5 kHz

Loudness Control (Level Related Equalization):  -40 dB

Dimensions (W x H x D):  435 x 136 x 338 mm (17-1/8” x 5-3/8” x 13-3/8”)

Weight:  7,5 kg (16 lbs 8 oz)

 

Yamaha GT-5000 turntable

Referencing the esteemed turntables of the golden age of Hi-Fi, the GT-5000 expands on this heritage in the pursuit of pure musicality. Including a pure straight and short arm for absolute transparency and openness in sound, balanced signal path delivering absolute purity in signal transmission and design reflective of the GT heritage and absolute quality in craftsmanship and construction, the GT-5000 presents a new era on Hi-Fi from Yamaha

 

Features

Massive yet elegant heavy wooden chassis effectively serve to dampen vibration
Large, heavy double-structured platter for enhanced stability and performance
Heavy 5 kg Aluminium Platter
Custom belt-drive mechanism driven by 24-pole, 2-phase AC synchronous motor
Short, straight tonearm designed to deliver superior rigidity as well as a balanced weight
Specially-designed custom feet
XLR balanced output jacks that enable end-to-end balanced signal transfer from cartridge to speaker

 

 

Straight, Short Arm for Openness and Transparency in Sound

Accurately capturing the audio from the source is the imperative first step in delivering authentic, true, Hi-Fi sound. The flagship GT-5000 adopts a short, straight arm designed to deliver superior rigidity as well as balance of weight and mechanics which results in improved traceability. A rigid mechanism with simple construction means there is no need for an inside force canceler weight.

 

 

Customised Belt-drive for Stabilising Platter

The customised belt-drive mechanism of the GT-5000 minimises the influence of the motor cogging and excludes feedback control for an open and smooth sound. The original GT concept utilised the notion of internal mass to counter feedback control. This is built upon with the GT-5000 which negates feedback control through the belt-drive.

 

Specifications

Phono motor section

Drive System:  Belt drive

Motor Type:  AC synchronous motor

Motor Drive:  Crystal sine wave

Rotation Speeds:  33-1/3 and, 45 rpm

Rotation Speed Variation:   ±0.1%

Rotation Speed Adjustment:  Built-in crystal osc./strobe light

Adjustment Step:  0.1%

Adjustment Range:  ±1.5%

Wow and Flutter:  0.04% or less (W.R.M.S.)

Platter:  Aluminium

Diameter:  350 mm

Sub Platter:  Brass

Diameter: 143 mm

Tonearm Section

Type:  Static balance straight tonearm

Effective Arm Length:  223 mm

Overhang:  −17 mm

Acceptable Cartridge Weight (including head shell): 

Counter Weight Small :  16–23.5 g

Counter Weight Large :  23–34 g

Head Shell Weight:  14 g (including wires)

Audio Section

Output Analog Audio:
1 x RCA Phono Out

1 x XLR Phono Out

Power Supply: AC 220–240 V, 50/60 Hz

[Power Consumption:  15 W (While playing);  0.4 W (While stopped)

Weight:  26.8 kg

Dimensions (W × H × D):  546 × 223 × 411 mm (including feet and protrusions)

Allowable Operating Temperature:  10–35 °C

 

Yamaha NS-2000 speakers

Natural Sound Speaker System

Pure Carbon Fiber Woofer Cone

Improved Beryllium Midrange and tweeter Domes

Unique In-line Speaker Configuration and Rounded Baffle

Uncompromising Choice of Materials and Construction Throughout

Superbly Crafted Cabinetry

 

The lead in sound-oriented technology that has grown out of a hundred-year tradition has been purposefully expanded in this loudspeaker system. Although Yamaha sound transducers are "digital-proof" thanks to fast and precise signal processing, the NS-2000 system is a resounding testament to the fact that research has not rested in this area either.

 

Further refinement of the exclusive beryllium and carbon fiber technology, weight reduction of the membranes and unrivalled experience in processing valuable woods create the Yamaha system in a class of its own, with which digital progress can be heard.

 

The baffle with rounded edges reduces diffraction and ensures increased stereo definition. The precision housing was developed on the basis of irrefutable computer calculations, coupled with knowledge of sound. The bass membrane made of pure carbon fiber is super light and ultra-stable with a diameter of 33 cm. New beryllium domes have a drastically reduced weight of 0.028 g for the tweeter and 0.5 g for the midrange. The crossover is equipped with coils made of oxygen-free copper wire and large-dimensioned ferrite cores. Level controls for the tweeter and midrange are a matter of course in this class.

 

Specifications

Type:  Fully enclosed bookshelf type

Speakers:

Low Frequency :  JA3301 Woofer carbon diaphragm 330 mm (13") cone

Mid Frequency :  JA0802A Midrange Beryllium diaphragm 88 mm (3-1/2") dome

High Frequency :  JA0526A Tweeter Beryllium diaphragm 30 mm (1-3/16") dome

Nominal Input Power :  125 W

Music Input Power :  250 W

Impedance:  6 Ω

Sound Pressure Level :  90 dB/W/m

Crossover Frequencies:

Low/mid :  500 Hz (12 dB/oct)

Mid-high :  6 kHz (12 dB/oct)

Level Controls:

Mid :  +3 dB (Continuously variable)

High :  +2 dB (Continuously variable)

Enclosure:  Fully enclosed type

Volume :  80 l

Exterior:  American walnut Urethane open pore finish

Dimensions (W x H x D):  440 x 752 x 404 mm (17-5/8" x 29-5/8" x 15-7/8")with grille attached

Weight:  47 kg (103 lbs 6 oz)

 

Yamaha CA-800 amplifier

Yamaha CA-800 stereo integrated amplifier offers, at a surprisingly agreeable features. Like the more expensive Yamaha CA-1000, the CA-800 has been created with emphasis on its primary function, that is to amplify the stereo signals from different program source components with the least possible distortion and without any other form of undesirable coloration. It accomplishes this objective by the use of a direct-coupled OCL complementary power amplifier, a plus/minus dual power supply system, a 3-stage direct-coupled tone control amplifier, and many other advanced features. You will note immediately that the CA-800 is designed with typical Yamaha attention to fine detail.

 

Direct-Coupled OCL Pure Complementary Stereo Power Amplifier for High Power and Low Distortion

The power amplifier of the CA-800 is the most advanced made today. This is the all-stage direct0coupled OCL pure complementary design which provides flat, linear amplification over an extremely wide bandwidth. Power for its operation is derived from an advanced plus/minus dual power supply system that combines an over-sized transformer and a pair of large 6,800 µF capacitors. Moreover, the power supply system drives all amplification stages, with the exception of the power amplifier, at a constant voltage. Such advanced design characteristics contribute greatly to the CA-800's low-range frequency response and stability, as well as to excellent performance specifications. These include RMS continuous power output of 45 watts per channel into 8 ohms, 20 - 20,000 Hz, both channels driven at 0,1 T.H.D., or 55 watts into 8 Ω , 1 kHz each channel driven, also at 0,1% T.H.D..pure, clean sound reproduction - quite enough to fill a large listening room - is only one solid reason to choose the CA-800.

 

Class-A Stereo Power Amplifier for Even Lower Distortion.

While the CA-800 is complete with a large stereo power amplifier of the Class-B operation like any other stereo amplifier available today, it also haas an exclusive feature; a switch to alter the circuit configuration of the power amplifier and convert it to a quality Class-A power amplifier. The difference is significant. A Class-B amplifier is a very effective design for transitor-type amplifiers, and delivers a high power output. A Class-A amplifier, in comparison, is less efficient, yet compensates for its inefficiency by virtually eliminating crossover distortion, which is the major source of distortion, which is the major source of distortion in the high frequency range for a transistor amplifier.

These figures underscore the importance of a Class-A amplifier; the RMS continuous power output is reduced to 10 watts per channel into 8 Ω , both channels driven at a T.H.D. of 0,1% over 20-20,000 Hz. That same distortion figure is reduced to 0,02% or less over 20 - 20,000 Hz at an output of one watt, or even to 0,015% - the very limit of the measuring instruments themselves - at 20 kHz at an output of 8 watts. Obviously, there is simply no better amplifier type to reproduce the transparent, delicate sounds of string instruments at a low volume level. Another conclusion is equally apt; the CA-800 is a most versatile stereo amplifier.

 

Four-Stage Direct-Coupled Phono Equalizer Amplifier for Transparent Tonal Quality

Since the phono equalizer enables the reproduction of the most popular source of music, the disc record, it is the key component of any hi-fi preamplifier, in the CA-800, this component is of the very highest quality, an advanced 4-stage direct-coupled amplifier employing selected low noise transistors. The virtures of this amplifier are three-fold; One; it is capable of handling a phono input signal of up to 310 mV, or approx. 100 times greater that what is required to drive it to the full output (input sensitivity is 3 mV). This capability is significant insomuch as that it practically exceeds the wide dynamic range offered these days by the latest and most advanced disc cutting techniques, as well as the new and improved pickup cartridges. Thus, you can be assured that every subtle shade of sound and every powerful burst of sound cut into your records will be reproduced without distortion. Secondly, the phono equalizer has an excellent Signal-to-Noise Ratio of 80 dB or better. This also contributes to the transparency of reproduced sound. Thirdly, absolute accuracy in the reproduction of stereo records is assured, since the phono equalizer provides an almost identical facsimile of the RIAA disc playback characteristics, keeping deviation from it to within a tolerance of ±0,2 dB.

 

Specifications

Power Output

Dynamic Power IHF

Class-B :  150 watts (4 Ω ); 130 watts (8 Ω )

Class-A :  20 watts (8 Ω )

Continuous RMS Power

Each Channel Driven at 1,000 Hz

Class-B :  70/70 watts (4 Ω ); 55/55 watts (8 Ω )

Class-A :  10/10 watts (8 Ω )

Both Channel Driven :   at 1,000 Hz

Class-B :  60 +60 watts (4 Ω ); 50 + 50 watts (8 Ω )

Class-A :  10 + 10 watts (8 Ω )

Both Channel Driven at 20 to 20,000 Hz

Class-B :  50 + 50 watts (4 Ω ); 45 + 45 watts (8 Ω )

Class-A : 10  + 10 watts (8 Ω )

Total Harmonic Distortion

Power Amplifier Only

Class -B :  less than 0,1% (at rated power): 0,04% (at 1 watt)

Class-A :  less than 0,1% (at rated power): 0,02% (at 1 watt)

Preamp Only Phono to Pre Out

Class-B :  less than 0,1% at rated power

Class-A :  less than 0,1% at rated power

Pream Only Aux to Pre Out :

Class-B :  less than 0,02% at rated power

Class-A :  less than 0,02% at rated power

Overall Aux to Power Output

Class-B :  less than 0,1% at rated power

Class-A :  less than 0,05% at rated power

Intermodulation Distortion (70 Hz : 7 kHz = 4 : 1 SMPTE method)

Power Amplifier Only

Class-B :  less than 0,1% (8 Ω ) at rated power

Class-A :  less than 0,1% (8 Ω ) at rated power

Power Amplifier Only

Class-B :  less than 0,05% (8 Ω ) at 1 watt

Class-A :  less than 0,05% (8 Ω ) at 1 watt

Overall (Aux to Power Output)

Class-B :  less than 0,1% (* Ω ) at rated output

Class-A :  less than 0,1% (8 Ω ) at rated output

Power bandwidth (IHF distortion 0,5% const)

Class-B :  5 to 70,000 Hz

Class-A ;  5 to 100,000 Hz

Load Impedance

Class-B :  4 to 160

Class-A :  (4 ) to 8 to 160

Damping Factor (8 Ω )

Class-B :  70 at 1,000 Hz

Class-A :  70 at 1,000 Hz

Frequency Response (at 1 watt)

Overal Tuner, Aux, Tape Power Bandwidth to Power Output:  10 to 50,000 Hz +0,5 dB -1 dB

Overall Mic to Power Output :  20 to 20,000 Hz +0,5 dB -2 dB

Power Amplifier Only :  10 to 100,000 Hz +0 dB -1 dB

Deviation from RIAA :  30 to 15,000 Hz +0,2 dB -0,2 dB

Channel Separation ( at rated power, 1,000 Hz)

Power Amplifier Only :  better than 60 dB

Overall from Phono 1, 2 :  better than 50 dB

Overall from Tuner, Aux, Tape Pb :  better than 50 dB

Overall from Mic :  better than 50 dB

Hum and Noise (IHF, Closed circuit A Network)

Overall from Phono 1, 2 :  better than 80 dB

Overall from Mic :  better than 70 dB

Overall from Tuner, Aux, Tape Pb :  better than 90 dB

Power Amplifier Only :  better than 100 dB

Volume at Minimum :  better than 90 dB

Input Sensitivity/Impedance (at rated power, 1,000 Hz)

Phono 1 :  3 mV/30 k Ω , 50 k Ω , 100 k Ω

Phono 2 :  3 mV/50 k Ω

Phono 1, 2 Max. Input Capability :  310 mV (T.H.D. 0,1%)

Mic :  2,5 mV/ 50 k Ω

Mic Max. Input Capability :  245 mV (T.H.D. 0,1%)

Tuner , Aux 1,2 :  120 mV/40 k Ω

Tape Pb A, B :  120 mV/40 k Ω

Power Amplifier Input  :  775 mV/ 40 k Ω , 345 k Ω (Class-A)

Output Level / Impedance (at rated power, 1,000 Hz)

Tape Rec Out A, B ;  120 mV/ 2 k Ω

Pre Out :  775 mV/ 2 k Ω ; 3,000 mV (Max. Output T.H.D. 0,1%)

Tone Controls

Bass :  ±15 dB at 50 Hz

Treble :  ±10 dB at 10 kHz

Filters

Low :  -3 dB at 20 Hz, 70 Hz (12 dB/oct)

High :  -3 dB at 6 kHz ; 12 kHz (6 dB/oct)

Loudness Control (Continuous Loudness Vol. At Minimum):  +10 dB at 100 Hz; +5 dB at 10 kHz

General

Semiconductors:  2 FETs; 49 Transistors; 12 Diodes; 4 Zener Diodes

Power Requirements:  AC 110 - 120 V, 220 - 240 V 50/60 Hz

Pc :  300 watts Max; 190 watts Rated

AC Outlets :  2 x Switched; 2 x Unswitched

Dimensions (W x H x D):  436 x 144 x 323 mm (17-1/4" x 5-3/4" x 12-3/4")

Weight:  13,5 kg (29,7 lbs)

Yamaha R-700 receiver

Natural Sound AM/FM Stereo Receiver

Combining technology  and musical sensitivity

The R-700 is a direct development of Yamaha's unique design philosophy - an approach that aims first and foremost at achieving the very highest in music reproduction accuracy. In addition to electronic measurements, extensive subjective and comparative listening tests by teams of music specialist monitor overall progress toward our design goals as well as indicate which areas need to be focussed on in order to maximize audible improvement in performance. These uncompromising efforts have resulted in a number of significant design innovations, as well as many subtle refinements which are continually improving the reproduction quality of Yamaha audio products.

Every detail and feature that can possibly affect sound quality - even to the slightest degree - is given thorough consideration and testing to ensure that its incorporation in the product will result in a positive benefit in terms of sound quality. The exciting new Yamaha spatial expander control offered on the R-700, for example, lets you "spread" the stereo sound field beyond the limits imposed by speaker location to more accurately recreate the image of a live performance.

In short, our approach combines both scientific method and musical sensitivity, allowing us to apply our technology to those areas of each product where it will do the most good; where you con hear it.

Super-Stereo Spatial Expander

Advanced Yamaha technology overcomes the last barrier to true high-fidelity reproduction. The Spatial Expander puts "ambience" back in the reproduced sound - the one element that conventional stereo cannot provide. With normal stereo reproduction, the apparent locations of the various music instruments are limited to the space between the left and right stereo speakers. Many so-called "ambience enhancement" systems attempt to overcome this by adding an extra pair of speakers - naturally requiring an extra amplifier plus the separate ambience unit - thereby considerably increasing system cost and inconvenience. The Yamaha Spatial Expander control, however, offers continously variable expansion of the stereo sound image, putting a more realistic distance between the musicians and creating an incredibly "live" sound without the need for any extra speakers or amplification.

DC Configuration Power Amplifier Section

Like the rest of the R-700, its power amplifier section is specifically designed to amplify and transmit the music waveform to your speakers without adding distortion. In fact, the R-700's excellent 0,015% distortion figure is maintained even at full 50 watts per channel power output. This has been accomplished by using a direct-coupled power amplifier design that eliminates capacitors in the signal path so distortion caused by phase shift of the music signal is minimized. The result is that you hear the music - not the amplifier - exactly the way it was originally recorded.

Other features

Continuously Variable Loudness Control

Record any source while listening to any other

Subsonic and High filters

lowNoise Phono Equalizer

 

The Tuner a better design for better sound

Station Locked Synthesizer Tuning System Quartz PLL

Synthesizer tuners actually have built-in noise, distortion and interference. Their internal quartz oscillator and frequency dividers, although accurate, are generating radio frequency signals within the tuner itself so some interference due to leakage of these signals is virtually unavoidable.

Station Locked Syntesizer Tuning Systems ICs

The R-700 tuner section, on the other hand, uses Yamaha's unique StationLocked tuning system which,in addition to being extremely accurate because it locks the tuner's frequency directly onto that of the broadcast station, produces no interference causing RF noise. You get pinpoint tuning accuracy plus pure, distortion-free reception - precisely what a first-class tuner should provide.

Ultra-Linear Direct FM Detector

Another impressive Yamaha technological feature incorporated in the R-700 tuner section is the ultra-linear direct FM detector circuit. It features greatly improved linearity even when compared to the recent pulse-count detector designs, and a greatly simplified signal path ensures that no noise or distortion is added to the music signal. The is just one of the innovations incorporated in the R-700 tuner section that help to raise FM reception to the level where if can justifiably be called "high fidelity".

DC NFB PLL Multiplex Demodulator

The purpose of the multiplex demodulator is to separate the left and right chanels of the composite stereo signal. Most high-performance tuners nowadays use a method which involves turning the composite signal on and off at a 38 kHz rate. Because the switches used for this are in the signal path, however, switching distortion can be a problem. The multiplex demodulator of the R-700 solves this by incorporating high-speed switches into the NFB loop of a high-slew-rate DC amp., thereby throughly absorbing any trace of switching distortion. Overall, this circuit provides excellent stereo separation, low harmonic and intermodulation distortion, and superior transient response for the most natural FM stereo reproduction.

Other Tuner Features:

Sophisticated tuning convenience, like pushbutton search tuning, and 5 FM/5 AM station preset tuning.

Optimum reception in any conditions, with automatic DX/Local switching, Auto Blend, and signal quality meter.

 

Specifications

Audio Section

Minimum RMS Output Power per Channel:

50 W (17 dBW) , 8 Ω , 20 - 20,000 Hz , 0,015% T.H.D.

55 W (17,4 dBW), 8 Ω , 1 kHz, 0,01% T.H.D.

Dynamic Headroom (8 Ω ):  2,5 dB

Total Harmonic Distortion (30 - 20,000 Hz)

Phono MM to Rec Out (3 V output) :  0,005%

Aux?Tape to SP Out (8 Ω , 1 W):  0,005%

Intermodulation DIstortion Ratio

Aux/Tape to SP Out (8 Ω , 25 W):  0,01%

Power Bandwidth (8 Ω , 25 W, 0,02% T.H.D.) :  5 to 40,000 Hz

Damping Factor (8 Ω , 1 kHz):  better than 40

Frequency Response (Aux/Tape to SP Out, 8 Ω ):  5 - 1000,000 Hz -1 dB

RIAA Deviation Phono MM :  ±0,5 dv

Input Sensitivity/Impedance:

Phono MM :  2,5 mV/47 k Ω  , 220 pF

Aux/Tape :  120 mV/47 k Ω

Input Sensitivity (New IHF)

Phono MM :  0,35 mV

Aux/Tape :  17 mV

Max. Input Level (0,01% T.H.D.)

Phono MM (20 - 20,000 Hz ) :  200 mV

Phono MM (1 kHz) :  250 mV

Output Level/Impedance:

Rec Out :  120 mV/470 Ω

Headphone Output :  259 mW (0,015% T.H.D.)

Signal-to-Noise Ratio (IHF A network)

Phono MM (5 mV, input Shorted) :  85 dB

Aux/Tape (input Shorted) :  100 dB

Signal-to-Noise Ratio (new IHF)

Phono MM :  74 dB

Aux/Tape :  85 dB

Residual Noise (IHF  A Network) :  115 µV

Channel Separation (1 kHz, Vol -30 dB, 5.1 k Ω )

Aux/Tape to Other Channel :  -53 dB

Phono MM to Other Channel :  -53 dB

Tone Control Characteristics

Bass (boost/cut) :  ±10 dB at 50 Hz

Treble (boost/cut) :  ±10 dB at 20 kHz

Turnover Frequencies

Bass :  350 Hz

Treble :  3,500 Hz

Filter Characteristics

Low (Subsonic, EQ Built-in):  15 Hz, -12 dB/oct

High :  8 kHz, -6 dB/oct

Continuous Loudness Control (Level-Related Equalization)

Max. Attenuation:  -20 dB at 1 kHz

Rec Output Level/Impedance (Fixed)

FM (100% mod. 1 kHz) :  500 mV/4,7 k Ω

AM (30% mod. 1 kHz) :  150 mV/4,7 k Ω

Tuner FM Section

Tuning Range:  87,6 to 108 MHz

50 dB Quieting Sensitivity

Mono (DX) :  3,2 µV (15,3 dBf)

Stereo (DX, Auto Blend) ;  25 µV (33,3 dBf)

Usable Sensitivity IHF Mono (1 kHz, 100% mod.)

300 Ω  :  2,5 µV (13,2 dBf)

75 Ω  :  1,25 µV (13,2 dBf)

Image Response Ratio (98 MHz):  62 dB

IF Response Ratio (98 MHz):  100 dB

Spurious Response Ratio (98 MHz):  100 dB

AM Suppresion Ratio (IHF):  65 dB

Capture Ratio:(IHF):  Local 1,5 dB; DX 2,2 dB

Alternate Channel Selectivity (IHF):  Local 30 dB; DX 82 dB

Selectivity (Two Signals):  DX 68 dB

Signal-to-Noise Ratio

Mono :  84 dB

Stereo :  80 dB

Distortion Mono

100 Hz :  Local 0,06%; DX 0,1%

1 kHz :  Local 0,06%; DX 0,3%

6 kh :  Local 0,08% DX 0,7%

Distortion Stereo

100 Hz :  Local 0,07%; DX 0,1%

1 kHz :  Local 0,07%; DX 0,5%

6 kh :  Local 0,09% DX 0,8%

Intermodulation DIstortion (IHF)

Mono :  Local 0,07%; DX 0,5%

Stereo :  Local 0,08%; DX 1%

Stereo Separation (Local)

50 Hz :  44 dB

1 kHz :  50 dB

10 kHz :  45 dB

Frequency Response

50 Hz to 10 kHz ±0,3 dB

30 Hz to 15 kHz ±0,5 dB

Subcarrier Product Ratio:  50 dB

Muting Threshold (DX):  5 µV (19,2 dBf)

Auto-DX Threshold:  30 µV (34,8 dBf)

Tuner AM Section

Tuning Range:  525 to 1,605 kHz

Usable Sensitivity (loop antenna):  200 µV

Selectivity:  30 dB

Signal-to-Noise Ratio:  50 dB

Image response Ratio:  40 dB

Spurious response ratio:  50 dB

Distortion (1 kHz):  0,3%

General

Semiconductors:  42 Transistors; 20 ICs; 3 FETs; 31 Diodes; 14 LEDs

Power Requirements:  110 - 120 V, 220 - 240 V 50/60 Hz

Power Consumption:  120 W

Dimensions (W x H x D):  480 x 122 x 337 mm (18-7/8" x 4-3/4" x 13-1/4")

Weigth:  9  kg (19 lbs 13 oz)