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)

 

Scientific Fidelity Tesla loudspeakers

Scientific fidelity Tesla

Tesla’s Name

Tesla is named after Nichola Tesla, the only man to understand electricity in his soul. He was the inventor of A/C electricity, making transformers and therefore long distance energy transmission possible. George Westinghouse gave him his start, Thomas Edison took credit for most of his inventions, and J. P. Morgan ( the owner of General Electric at the time) crushed him.

He died a broken and forgotten man.

this speaker is dedicated to him.

Tesla’s woofers

The woofers that are used in Tesla are Scientific Fidelity’s own Design, employing many unique features.

Long throw-soft suspension design

To avoid dynamic compression (the problem of having less and less relative bass the louder you turn it up), which is caused by the woofer’s increasing stiffness as it gols through its travel, a very long voice coil and a soft compliant suspension have been selected.

R.I.D.S.

the aforementioned system simply consists of two foam gaskets (one in front of the woofer frame and one behind it), and a compression ring to hold the woofer against the cabinet so that no part of the woofer frame touches the cabinet.

Carbon Fiber Cone

carbon fiber is very strong, yet lightweight, when woven into cloth, soaked in resin and then pressed into a cone shape it becomes an extremely rigid piston.

Aluminum Phase Plug

by extending the pole-piece completely through the voice coil to the front of the speaker, heat is conducted away from the voice coil in both directions (providing a highly conductive material, such as aluminum, is used) and power handling is greatly increased.

High Loss Norsorex Surround

a high loss surround not only flexes freele at low frequencies but also absorbs energy at high frequencies so that it damps any edge ringing norsorex is currently one of the best materials for this purpose

Edge-Wound Copper Ribbon Voice Coil

ribbon wire is superior for conducting heat away from the center of the voice coil. It also puts more conductor in the gap than any other type of wire.

Tesla’s Finish

Tesla’s beautiful wood finishes (Rosewood, Teak and Ash) are all obtained using obiche wood. Obiche is a fast growing tree from the country of Cameroon, which has some of the best forest management in the world. In Cameroon, 80% of their forests are protected by law. Only 20% are open for commercial production, and in that 20% only one obiche tree is allowed to be cut per acre per year, and that tree must be over 200 inches in circumference.

This is a sustainable process so long as the trees are cut in this manner three will always be obiche trees.

Specifications

Type:  floor-standing , two-way, reflex-loaded,

Speakers Configuration:  D'Appolito- type, woofer-tweeter-woofer configuration.

Drivers:

Low  Frequency :   two 6.5" bass-midranges

High Frequency : 1" Vifa aluminum-dome tweeter

Frequency Response:  32 Hz – 35 kHz +-3 dB

Sensitivity:  88 dB (1 W/1 m)

Impedance:  8 Ω 

Crossover Frequency:  1000 Hz

Power Requirements:  20 Watts or more

Dimensions (H x W x D):   49” x 8” x 13”

Weight:  22,68 kg (50 lbs)

 

Elac 1 Series 105 speakers

Good style has a name, and costs almost nothing.

For µsec, music is an indispensable part of life, happiness. Joy, relaxation, social medium. In your living room, it is not only musical excellence that makes quality, but also the physical presence of the loudspeakers; they must be beautiful, modern and easy to integrate, and  - affordable.

The new 1 Series unites all the virtues of loudspeaker culture:

Natural sound, individual design, advanced technology.

For the 1 Series, new drive units have been developed : tweeters whose wave guide models especially the horizontal dispersion and lends the loudspeaker a dynamic outward appearance; woofers that show the Elac design classic - the aluminum membrane - in an anodised version for the first time.

Graceful floor standing speakers and compact monitors provides adequate set up options for any room - as a home theatre set, or as a classical stereo set.

Elac 105

Graceful 2-way floor-standing speaker with elegant driver style through anodised aluminium woofers and dynamically curved wave guide of the tweeter.

Specifications

Type: 2-way bass reflex d'Appolito configuration

Drivers:

low Frequency :  2 x 140 mm Midrange-Woofer

High Frequency :  1 x 24 mm tweeter

Crossover Frequency:  3,800 Hz

Nominal Power:  80 W, 

Music Power:  120 W

Impedance: 4 Ohm

Frequency Response:  40 - 22,000 Hz

Efficiency:  86 dB

Recommended Amplifier Power:  20 - 150 W

Dimensions (W x H x D):  900 x 180 x 252 mm

weight:  11.4 kg

Finishes: matt black, silver, cherry

 

Focal Chorus 806V speakers

For Focal, Chorus symbolizes one of the most stimulating challenges for the loudspeaker and refined product manufacturer that we are: to allow the greatest number of consumers to access our technological innovations. For the first two generations Chorus (2000) and Chorus S (2003), the objective was to conserve a hi-end sound and maintain sophisticated Focal technologies by adapting our industrial machine to the highest standards. While outsourcing had become a key economic strategy for the majority of manufacturers, we chose on the contrary to heavily invest in our manufacturing process in order to achieve an exceptional sound quality while at the same time remaining competitive. It is the only possible way in this path of permanent innovation: development and manufacturing of loudspeakers ”Made in France”, design by cabinet-makers, mastery of quality, total autonomy in the design and development of our products. This strategy has been key to the success of the preceding Chorus lines.

This third generation known as Chorus 800 V will go even further in this strategy. Technological innovation does not only solely touch strategic components of the speaker, but the actual whole of the design. Thanks to the use of advanced and exclusive materials, elaborate manufacturing techniques of the cabinets, the Chorus 800 V line of today shines with a unique, hi-end esthetic. Chorus V isn’t only a performing product line, ideal for entering the Focal universe, but objects that will inhabit living spaces, with an innovative esthetic, quality of manufacture and a finish worthy of a higher segment. This is indeed a new esthetic dimension, a new era for the ”Spirit of Sound”.

 

Neutral and balanced, the Chorus 806 V seduces by the richness of its upper midrange and the speed of its bass. An entirely refined speaker, ideal to play in rooms under 20 m2 without any limits. And easily larger spaces if it is combined with SW 800 V.

 

Specifications

Type:  2-way bass-reflex bookshelf speaker

Drivers:

Low Frequency:  165 mm (6-1/2") Polyglass mid-bass

High Frequency:  25 mm (1") TNV AL/Mg Inverted dome tweeter

Frequency Response:  55 Hz - 28 kHz (±3 dB)

Low Frequency Point:  77 Hz (-6 dB)

Sensitivity:  90 dB (2.83 V/1 m)

Nominal Impedance:  8 Ω 

Minimum Impedance:  3,6 Ω 

Crossover Frequency:  3,000 Hz

Recommended Amplifier Power:  25 - 120 W

Dimensions (HxWxD):  390 x222 x 293 mm (15-3/8" x 8-3/4" x 11-9/16")

Net Weight:  8,2 kg  (18 lbs)

 

Focal Chorus 705V speakers

Since the year 2000, the different generations of the Chorus line have benefited from this approach, as we produced speakers that cost less and performed better. To achieve this goal, we invested massively in a superior method to speaker manufacturing, where intelligent machining and precise handwork were absolutely necessary.

It was the only possible way in this drive for quality and competitiveness: development and manufacturing of French-made loudspeakers, design of the cabinets, quality control, a total autonomy in the development and design of our own products. This method allows us to innovate, to entirely and independently turn ideas into reality, to place patents internationally, and have the means to anticipate trends. And finally, to progress.

The third generation, Chorus 700 V, goes even further. A direct descendant of the Chorus 800 V line of which it heavily borrows technical elements (except Power flow) yet with a more Amati traditional finish, Chorus 700 V invites you in to the Focal universe. The build quality and high-end finishing work are entirely unknown in this price-range.

 

Chorus 705 V is the ideal loudspeaker for installation in rooms of modest dimensions (approximately 15 m²). With a responsive and lively bass, it represents the foundations of a great system, especially when paired with the SW 700 V subwoofer.

 

Specifications

Type:  2-way bass-reflex bookshelf speaker, wall mounting.

Drivers:

Low Frequency:  140 mm (5") Polyglass midbass

High Frequency:  25 mm (1") TNV AL./Mg Inverted dome tweeter

Frequency Response:  65 Hz - 28 kHz (±3 dB)

Low Frequency Point:  57 Hz (-6 dB)

Sensitivity:  89 dB (2.83 V/1 m)

Nominal Impedance:  8 Ω 

Minimum Impedance:  3 Ω 

Crossover Frequency:  3,000 Hz

Recommended Amplifier Power:  25 - 100 W

Dimensions (HxWxD):  315 x192 x 248 mm (12-3/8" x 7-9/16" x 9-3/4")

Net Weight:  5,7 kg  (12,5 lbs)

Castle Harlech speakers

Rather than sacrifice the superb stereo imaging that result from a narrow cabinet, Castle has employed two small polypropylene coned mid/bass drive units in the Harlech -  on the top and one on the front face - instead of a larger mid/bass drive unit.

Each driver works with its own Quarter Wave pipe tuned to different frequencies but which join in a common vent at the speaker's base. The two drive units give exceptional bass extension and superior control but also radiate midrange energy into the room in a way that produces a large, spacious sound with very low distortion.

 

Quarter Wave

Competing speaker systems set themselves apart by the techniques with which bass extension is achieved. For the largest models in its range of floor-standing speakers Castle has adopted Quarter Wave loading. This technique can be traced back to the work of the legendary Paul Voigt inn the 1930s and has more in common with vibrating columns of air in organ pipes and folded horns that with alternative methods of bass extension like reflex or transmission line loading.

Designer Roger Loughton's execution of Quarter Wave techniques for Castle uses the latest measurement and optimisation techniques. The open, natural quality of attuned pipe has been retained in a tapered version that, with the drive unit at an optimum position along the pipe, reduces unwanted excitation at the fundamental frequency of the pipe and associated harmonics by natural acoustic filtering. Tapering the pipe also allows it to be folded inside the cabinet that not only brings it down to domestic size but enables the internal structure considerably to add to the rigidity of the enclosure.

The superiority of the Quarter Wave technique, correctly executed, over orthodox reflex loading with a cabinet of the same or bigger size is higher bass efficiency, maintained down to a lower frequency. Quarter Wave systems have the natural power and character of true, deep bass.

 

Specifications

Frequency Response:  40 Hz - 22,000 Hz

Nominal Impedance:  8 Ω

Sensitivity:  88 dB for 1 W at 1 m

Amplifier Requirements:  25 - 150 watts

System Type:  Quarter Wave

Bass Unit:  Twin 130 mm in a cast chassis with injection moulded cone

Treble Unit:  25 mm metal dome

Dimensions (W x H x D):  200 x 940 x 320 mm

Weight:  48 kg (packed)

 

Castle Howard S2 speakers

The Howard S2 is the largest member of the Castle Quarter Wave family. The narrow fronted cabinet coupled with a 25 mm metal dome tweeter guarantees stable stereo imagery with excellent presentation of depth and separation

The two 165 mm plasticised paper pulp drivers were developed especially for the Howard. They have massive high energy magnets, stiffer than usual suspensions and are built into substantial die-cast chassis.

These drive units excite the tapered and folded Quarter ave pipe inside the rigid cabinet. Exceptionally clean, extended bass with low distortion, high energy mid and sweet treble are the hallmarks of the Howard S2.

 

Our largest Quarter Wave system loudspeaker, the Castle Howard S2, is tuned to roll of below 35 Hz, making the system larger than the Harlech, and requiring an extra bass driver to load its longer horn and increased internal volume. Thanks to the high efficiency inherent in Quarter Wave systems, the increased cabinet volume also produces increased sound volume which remain slow in distortion and high in accuracy, the two key parameters for true high fidelity sound. Higher register are delicately handled by our proven 25 mm metal dome treble unit. As beautiful to look at as it is to listen to, the new Castle Howard S2 is engineered for a lifetime's enjoyment.

 

The room filling spaciousness in the Howard S2's sound is aided by careful positioning of the bass/mid drivers on both the front and top surfaces of the cabinet, so you can enjoy more of the music, in more locations within the room.

 

Specifications

Frequency Response:  35 Hz - 22,000 Hz

Nominal Impedance:  8 Ω

Sensitivity:  88 dB for 1 W at 1 m

Amplifier Requirements:  25 - 130 watts

System Type:  Quarter Wave

Bass Unit:  Twin 165 mm in a cast chassis with doped paper cone

Treble Unit:  25 mm metal dome

Dimensions (W x H x D):  230 x 1030 x 360 mm

Weight:  52 kg (packed)

 

Apogee Acoustics Centaur Minor loudspeakers

The Centaur Minor was Apogee's first and smallest ribbon hybrid when it was released in 1991. Also the cheapest yet Apogee at £1150 in the UK, and a similar price in $'s in the US.

At 100 cm tall, 35 cm wide and 22 cm deep, its footprint is no bigger than a stand mounted mini-monitor speaker.

The 26" (6 element) etched ribbon tweeter is the same version which is used in the later model of the Stage. The 6.5" dynamic cone woofer is in a long rectangular enclosure set towards the outside of the speaker so the dipole ribbon fires into 'free air'. It is positioned at a height which is the mid-point of the ribbon tweeter, it can just be seen behind the (hard to remove) grill.

 

Specifications

Bass :  6.5" Dynamic cone

Midrange :  26" Aluminium/Kapton ribbon (etched 6 segment)

Max. Sound Level:  107 dB

Sensitivity (at 3 m):  85 dB

Frequency Response:  40 Hz - 20,000 Hz  (-3dB)

Recommended Amplifier Power:  50 W (8 Ω  load)

Crossover Frequency:  800 Hz

Nominal Impedance:  6 Ω  (4 Ω  minimum)

Dimensions)H x W x D): 1000 x 350 x 220 mm

Weight:  52 lbs each

Finishes Available:  Silver grey

 

Apogee Acoustics Centaur Major loudspeakers

The Centaur range was the first hybrid speakers range from Apogee, the Centaur Major being biggest model.

Using a 10" dynamic woofer and a 40" ribbon tweeter the Major stands 163cm tall, 46cm wide and a total depth of 30cm.

The enclosure for the woofer is approximately 107cm high, 28cm wide and deep. The tweeter ribbons are on the inside edge of each speaker and like all Apogee's work as a dipole.

The speakers are nearly as room dominating as the Duetta Signatures, with only the width being significantly smaller, and require nearly as much free space around them.

Although they will work with smaller amps, they justify being fed by a high quality, high current amp.

 

Specifications

Bass :  10" Dynamic cone

Midrange :  40" Aluminium/Kapton ribbon (etched 5 segment)

Max. Sound Level:  110 dB

Sensitivity (at 3 m):  83 dB

Frequency Response:  30 Hz - 20,000 Hz  (-3dB)

Recommended Amplifier Power:  100 W (8 Ω  load)

Crossover Frequency:  450 Hz

Nominal Impedance:  6 Ω  (3,5 Ω  minimum)

Dimensions)H x W x D): 1630 x 460 x 300 mm

Weight:  100 lbs each

Finishes Available:  Rosewood, walnut, oak and mahogany or silver grey

 

Cybernet SRC-80 receiver

SRC-80 Integrated Stereo Receiver - The Slimline Series SL-80

Amplifier Section Features:

Direct coupled OCL circuitry

Wide, dynamic range phono equalizer amplifier

Loudness compensation

High and low filters

Moving magnet and moving coil cartridge capability

Detented tone controls

41 detent volume control

Two tape monitors with 2-way dubbing

Instant audio mute switch

 

Tuner Section Features

Quartz controlled frequency synthesized tuning

Fluorescent digital display

14 programmable preset station selection and indicators

Automatic scanning

Sensitive dual gate MOS FET in FM front end

Highly selective IF section with 3 dual element ceramic filters

PLL multiplex decoder

LED signal strength and auto stereo indication

Last channel memory circuit

 

Specifications

Amplifier Section

Power Output:  50 W + 50 W (20 - 20,000 Hz) at 8 Ω

Total Harmonic Distortion (rated power at 20-20,000 Hz):  0,08% at 8 Ω

SMPTE Intermodulation Distortion:  0,08%

Frequency Response:  20 - 20,000 Hz ±0,5 dB

Power Bandwidth:  7 - 35,000 Hz _3 dB

Input Sensitivity/Impedance

Phono MM :  2,5 mV/47 k Ω

Phono MC :  100 µV/47 K Ω

Others :  150 mV/47 k Ω

Huma and Noise Ratio

Phono MM :  73 dB

Phono MC :  62 dB

Others :  93 dB

Maximum Input Voltage

Phono MM :  150 mV

Phono MC :  6 mV

Damping Factor:  40 (8 Ω , 1 kHz)

Tone Controls

Bass :  ±10 dB at 100 Hz

Treble :  ±10 dB at 10 kHz

Loudness Compensation +7 dB (at 100 Hz) +3,5 dB (at 10 kHz)

Filters

High :  10 kHz (6 dB/oct)

Low :  40 Hz (6 dB/oct)

Audio Mute:  -20 dB

Tape Recording Output :  130 mV (at rated input sensitivity)

FM Section

Tuning Range:  87,5 to 108 MHz

Usable Sensitivity: 

Mono :  10,9 dBf

Stereo :  20 dBf

50 dB Quieting Sensitivity

Mono :  18 dBf, 4,4 µV (IHF)

Stereo :  40 dBf, 54,7 µV (IHF)

Total Harmonic Distortion

Mono :  0,15%

Stereo :  0,3%

Alternate Channel Selectivity:  60 dB (±400 kHz)

Capture Ratio:  2 dB

Selectivity )±400 Hz):  60 dB

Stereo Separation(at 1 kHz):  45 dB

Audio Frequency Response:  30 Hz - 15 kHz (±0,5 dB)

Signal-to-Noise Ratio: 

Mono :  70 dB (A-weighted)

Stereo :  65 dB (19/38 kHz filtered)

Spurious and IF Rejection:  70 dB

Image Rejection:  45 dB

Subcarrier Ratio:  65 dB

Tuning Frequency Space:  50 kHz

Antenna:  75 /300 Ω

AM Section

Tuning Range:  531 to 1,602 kHz

Sensitivity (loop Antenna):  350 µV/m (S/N=20 dB)

Image Rejection:  45 dB (600 kHz)

Alternate Channel Selectivity:  45 dB (20 kHz)

Distortion: 0,5%

Signal-to-Noise Ratio:  45 dB

Antenna:  Built-in adjustable ferrite bar, and provision for ext. Antenna

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

Dimensions (W x H x D):  430 x 106 x 390 mm (16-15/16" x 4-3/16" x 15-3/8")

Weight:  12,3 kg