Philips Spectron SP40 loudspeakers

 Philips SP40

Rugged Deep Response Woofer

To meet the specifications for the SP40, Philips engineers were obliged to design a woofer which could meet four rigid acoustic requirements; deep bass response, high efficiency, impeccable fidelity, and rugged durability. The newly designed 10" cone woofer offers all these features.

In any system, a woofer must provide rich, satisfying bass. The Sp40's woofer exceeds even the goals of fine speakers, however, reaching down to 30 Hz for full bottom. With a fundamental resonance frequency of 20 Hz, however, the driver also avoids the hollow, boxy  tones so often found in speakers of this size.

Construction of the cone is from fibre-filled pulp selected for its combination of strength and exceptional resistance to distortion. The driver itself is seated in a new high-compliance suspension.

At the heart of the woofer is Philips patented Feroxdure ferrite magnet and an all-aluminum voice coil. Feroxdure eliminates the need for massive unwieldy magnets which were formely required to create deep bass response. One light-weight Feroxdure magnets provides more strength than orthodox magnet of considerably greater size. At the same time, the aluminum wire-wound voice coil, which minimum mass, offers significantly less resistance to movement than the standard voice coil. And the all-aluminum bobbin radiates heat efficiently, one reason why this driver is so resistant to over-load; even at 60 watts (RMS) of power input, this woofer will stand up to stress.

The efficiency of the SP40 's woofer makes the unit a valuable addition to even moderately=powered system which normally cannot drive acoustic suspension speakers. Because of the new high-compliance suspension, the unit is able to deliver a sound pressure level of a full 96 dB at 1 m with acoustic distortion of less than 1.0% from power input of only 4 watts RMS.

Wide-Dispersion Midrange

The same design features which characterize the SP40's woofer have bean incorporated in the new 2" dome mid-range driver.

The same patented Feroxdure ferrite magnet and the all-aluminum voice coil ensure high efficiency and faithful reproduction along with surprisingly light weight. The power of this new driver is comparable to that of orthodox drivers much larger and heavier.

Normal speaker system force the mid-range driver and woofer to share the same baffle. This design allows interaction between the woofer and mid-range driver which can result in severe distortion. The new Philips mid-range driver is acoustically isolated in its own enclosure. The mid-range driver is capable of operating at full efficiency even outside the speaker cabinet.

Because of the directional nature of mid-range frequencies, the driver has been designed for wide dispersion. The total angle of dispersion is a full 120(o).

Special Acoustically Isolated Tweeter

The same design principles found in the woofer and mid-range driver have been utilized in the design of the new tweeter, a driver which ranks with the world's best.

A 1" dome design, the driver features a 1" copper wire-wound voice coil and the patented Philips Feroxdure magnet. The Feroxdure ferrite magnet packs considerably more power into the same size than orthodox magnets can offer strength means faster response and cleaner sound.

Like the mid-range driver, the tweeter is sealed in its own enclosure, isolating the driver from the woofer which could cause distortion. The tweeter is capable of operating at full efficiency even outside the speaker cabinet.

Specifications

Drivers

Woofer 10" cone-type

Mid-range 2" wide-dispersion dome-type

Tweeter 1" dome-type

Power Handling Capacity:  60 watts (RMS); 100 watts peak power

Impedance :  8 Ω 

Efficiency:  96 dB at 4 watts 1 metre (THD 1.0%)

Frequency Response:  30 - 20,000 Hz

Crossover Frequencies:  500 Hz, 4500 Hz

Crossover Network:  3-way 12 dB/octave parallel type

Fuse Type:  Fast blow protection

Dimensions (H x W x D):  22" x 13" x 10,5"

Weight:  45 lbs

Phase Linear 4000 preamplifier

Phase Linear 4000

the stereo preamplifier designed to correct the shortcomings in the recording process. Noise inherent in tapes, FM broadcasts, and records is reduced to virtual inaudibility. Dynamic range reduced during recording is selectively restored to closely approximate the original information. This means that for the first time you can hear your music against a silent background. Now your music can extend upwards to life like levels - a kettle drum will have the power of a kettle drum - a cymbal will ring with the intensity of a cymbal.

How else would you describe a preamplifier with:

A peak Unlimiter that restores dynamics lost in recording to closely approximate the original

A Downward Expander that reads "gain riding" and expands dynamics down to precisely the intended level

An Auto-Correlator that makes record/tape hiss and FM broadcast noise virtually vanish without affecting musical content

Plus and Active Equalizer that gives you flat energy distribution over the full audio spectrum. Joystick Balance and Step Tone Controls that allow precise music tailoring to your listening environment and SQ and Phase Linear differential logic for Quad Sound.

The 4000 is an advanced stereo preamp that actually puts back in what recording studios take out, lets your music (at last) reach life-like levels without distortion; lets you (for the first time) hear your music from a silent background. It is , in a word , incredible.

Specifications

Total Distortion:  less than 0,25%,. Typically 0,2%

Total Noise:  

High Level :  83 dB below 2 V

Phono :  72 dB below a 10 mV reference

Input Impedance

Phono :  No less than 47 k Ω  (20 Hz - 20 kHz)

High Level :  50 k Ω 

Gain:  

Phono :  65 dB

High Level :  15 dB

Output Voltage:  Full output  8 V RMS. better than 2 V into 47 k Ω  or greater

Frequency Response: 

Phono :  ±1 dB of RIAA from 20 Hz to 20 kHz

High Level :  ±1 dB from 30 Hz to 20 kHz

Tone Controls

Bass :  Monotonically increasing and decreasing, dual hinge points, +-8 dB at 20 Hz.

Hinge points switch selectable beginning at 40 Hz or 150 Hz.

Treble :  Monotonically increasing and decreasing, dual hinge points, ±8 dB at 20 kHz.

Hinge points switch selectable beginning at 2 kHz and 8 kHz.

Active Equalizer:  6 dB /octave boost below 50 Hz

Peak Unlimiter (Nominal peak unlimit rate attack threshold, front panel variable) 0,5 dB/micro second for +6 dB peak unlimit operation

Nominal Amplitude  Attack Threshold:  0,2 V peak at input to peak unlimiter

Downward Expander:  Donward expansion commences at -35 dB . Ultimate limit is -41 dB. Unlimiter window is 35 dB wide, upper and lower thresholds are simultaneously variable by front panel in limit threshold control.

Four Channel Facilities: Build in CBS SQ system with Phase Linear developed differential logic for enhanced four channel separation.

Semiconductor Complement:  45 Transistors; 9 ICs; 57 Diodes; 2 Zener regulators; 2 LED

Auto Correlator (Noise Reduction Systems):

High Frequency noise reduction commences at 2 kHz and is 3 dB, reaching 10 dB from 4 kHz to 20 kHz.

Low Frequency noise reduction begins at 200 Hz, ultimately reaching 20 dB at 20 Hz.

passive Subsonic filter rejection of -35 dB at 5 Hz.

Weighted overall noise reduction is -10 dB from 20 Hz to 20 kHz.

Tape Monitor:  Two tape switches permitting any input source to be recorded on either of two tape machines, play back selection of either machine, or copy of tape machine 2 on to 1 while listening to a second source.

Power Switching Capability:  Switched outlets are capable of switching up to 25 ampers

Power Consumption:  

Preamplifier :  40 watts

Size (W x H x D):  19" x 7" x 10"

Weight:  18 pounds

 

Panasonic SA-5800 receiver

Panasonic SA-5800

From a highly sensitive FM/AM stereo receiver housing powerful direct-coupled ITL-OTL-OCL amplifier and 2-FETs, 1-ics stereo tuner.

Designed to faithfully entertain your ears, you, the discriminating audiophile. This new FM/AM Stereo Receiver highlights all of the exclusive national Panasonic Features: Direct-Coupled ITL-OTL-OCL amplification circuitry and newly developed Differential amplifier circuits reward you with exciting distortion-free audio power. Two highly sensitive 4-pole (MOS) Field Effect Transistors, a Linearly Variable 4-gang FM capacitor, and a costly Monolithic IC in the specially built MPX circuit will gratify your growing need fro selectivity in today's crowded FM world.

Wider frequency response, higher damping factor with lower distortion and noise level, and superb, clear output signal all add up to incomparable stereo enjoyment. The skilfully designed station targeting system, bolstered by highly sensitive tuning circuitry, makes the SA-5800 the most advanced stereo receiver available today. The well-bred child of a close-knit family of electronics wizards, this sensitive instrument effortlessly meets your highest standards.

Powerful 100W Music Power

Lend an Ear & Listen with Care. No sound has ever been so pure and so powerful as that of the SA-5800. These 100 watts of output power are more than sufficient to engulf your whole house in a sea of crystal-pure sound. Whether you want to lose yourself in the driving rhythms of Jazz or the New Rock, or slide into that warm, classical world, let the SA-5800 be your magic Carpet. Its vibrant power will set a crowd swinging to the throbbing beat, or gently soothe the meditative individual.

Reliable, Stable Amplification

Apart from the unique Direct-coupled circuitry, this receiver also features newly developed differential amplifier circuits. No matter how weak the input signal, the amplifier section will magnify it faithfully, in no way impairing its tonal colors. Furthermore, it assures you of rock-stable performance with clean, linear response to all audible frequencies.

Exclusive ITL-OTL-OCL Circuitry

The Tremendous power of the SA-5800 is channelled through a totally new concept in circuit construction. By eliminating the need for the input and output transformers, and the output capacitor, the very source of noise and signal distortion has been eradicated. this new direct-coupled circuitry greatly widens the range of frequency response and  boosts the damping factor to new higher levels. it also reduces the signal distortion to the range of imperceptibility.

Clean Full-Bodied Sound

Even the transistors at the heart of this unique circuitry are totally new. Specially selected high performance transistors have been liberally employed throughout, enabling your to fully perceive the richness and grandeur of any musical sound.

The full complement of tone controls gives you the greatest possible range of Bass and Treble selection allowing you to tailor the sound to your most demanding needs and tastes. The volume control will help you to fill your ears with full concert hall stereo reality

Totally Noise-Free Pre-Amplifier

The SA-5800 offers your ears crisp-clear sound rich, in all the perceptible tonal colors. ALL the thanks go to the extremely low-noise transitory (2SA666) and the honestly built 2-stages PNP-NPN directly coupled equalizer incorporated in the pre-amplifier.

Whatever the strength of the signal you feed into theSA-5800, it will respond faithfully, keeping the amplified signal free from any distortion or noise.

Regulated Power Supply

Have no worries. Be assured that the power output of the SA-5800 as in all National Panasonic's top quality audio in its, is perfectly regulated for reliable sure performance. For producing electrifying Symphonic climaxes, heavy Rock, cool Gypsy violins or soft Mood Music, The power supplied to the different component circuits is maintained at the same stable level allowing precisely balanced stereo reproduction and tonal richness.

Two Highly Selective MOS FETs

The SA-5800 features an entirely new FM frontend design. Completely shielded in a subchassis from distortion producing interference and trouble power hum , it houses two highly selective Field Effect Transistors (4-pole MOS type) in both the first and the second RF stages which are perfectly co-ordinated with a linearly variable 4-gang Tuning Capacitor and 4 tuned circuits. This flawlessly engineered design, assures you of unrivalled sensitivity and peak selectivity for collecting any FM station, near or far.

Stage IF Amplification Circuit

Complementing the highly effective FM frontend, is a specially designed 6-stage IF Amplification Circuit employing 5 Differential Amplifiers and a unique 6-element Ceramic Filter. The highly refined selectivity characteristics offered by this advanced 6-stage IF Circuit are unparalleled by any receiver or tuner of this price range. Alternate Channel Selectivity is as much as 80 dB and capture ratio is far better than 1,5 dB

Noise-Eliminating Muting Switch

The SA-5800 is an absolute joy to operate. You'll find that its performance is as clear and smooth as the cool, distinctive lines of its solid teak cabinet. Its pure tones should never be marred by interstation static shocks, hisses or hums. However, if it happens that such noise does interfere with your listening pleasure, just switch on the Muting Circuit. This feature rids the signal of unwanted noise for uninterrupted musical enjoyment.

Other Features:

Two Tape Monitors,

Efficient Loudness Control,

High Cut-off Filter,

Unique Station Targeting System,

Monolithic IC in the MPX circuit,

Versatile FM Antenna Circuit and Sensitive Ferrite-bar antenna,

Superb Selectivity, and Unmatched Sensitivity of AM sound,

Signal Strength Meter for AM,

Center Tuning meter for FM,

Reverse Automatic Gain Control,

Functional Slide Rule Tuning Panel.

Specifications

Audio Section

Music Power

2 x 50 W at 4 Ω 

2 x 37,5 W at 8 Ω 

RMS Power Each Channel

37 / 37 W At 4 Ω 

27 / 27 W at 8 Ω 

RMS Power Both Channels

27 / 27 W at 4 Ω 

23 / 23 W at 8 Ω 

Total Harmonic Distortion:  0,5% at 40 - 16,000 Hz (rated power, 4 Ω ); 0,5% at 1,000 Hz (Rated power, 4 Ω )

Intermodulation Distortion: 0,7% at 250/8000 Hz =4:1 (Rated power, 4 Ω )

Power Bandwidth:  5 - 40,000 Hz (-3 dB)

Frequency Response:  15 - 85,000 Hz (-3 dB)

Damping Factor:  70 (8 Ω )

Load Impedance:  4 - 16 Ω 

Signal-to-Noise-Ratio  (at rated power)

Phono :  62 dB

Aux :  77 dB

Input Sensitivity

Phono (mag) :  2 mV/ 50 k Ω 

Aux :  180 mV/ 100 k Ω 

Tape Monitor (DIN)

Input :  300 mV/55 k Ω 

Output :  60 mV/70 k Ω 

Tape Monitor (Pin terminal)

Playback :  180 mV/40 k Ω 

Rec Out :  180 mV/750 Ω 

Tone Controls

Bass :  +13 -14 dB at 50 Hz

Treble :  +10 -10 dB at 10,000 Hz

FM Tuner Section

Antenna Terminals:  300 Ω  (balanced); 75 Ω  (unbalanced)

Frequency Range:  88 - 108 MHz

Sensitivity

Antenna 300 Ω   (at ± 40 kHz deviation)

1,8 µV  (s/n 30 dB)

1,6 µV  (s/n 26 dB)

Antenna 75 Ω   (at ± 40 kHz deviation)

1,2 µV  (s/n 30 dB)

1,0 µV  (s/n 26 dB)

Harmonic DIstortion (at ± 40 kHz deviation)

Mono : 0,2%

Stereo :  0,6%

Signal-to-Noise-Ratio  (at ± 40 kHz deviation)

Mono :  64 dB

Stereo :  63 dB

Selectivity:  80 dB  (at 400 kHz)

IF rejection:  100 dB

Image Rejection:  90 dB

AM Suppression:  45 dB

Capture Ratio:  1,5 dB

Leak Carrier:  38 dB (at 19 kHz); 50 dB  (at 38 kHz)

Stereo Separation:  40 dB at 1,000 Hz

Limiting Point (-3 dB):  1,2 µV 

Deemphasis:  50 µsec

Auto Stereo Operation Level:  6 µV 

Bandwidth

IF Amplifier :  400 kHz

FM-Demodulator :  400 kHz

AM Tuner Section

Frequency Range:  525 - 1605 kHz 

Intermediate Frequency (IF):  455 kHz 

Sensitivity:  15 µV 

Selectivity:  30 dB

Image Rejection:  65 dB

IF Rejection:  70 dB

General

Power Supply:  AC 110/120/220/240 V 50/60 Hz

Power Consumption:  230 W

Dimensions (W x H x D):  406 x 140 x 356 mm (16" x 5-1/2" x 14")

 

McIntosh MC402 power amplifier

McIntosh MC402

Producing a minimum 400 watts per channel in stereo, 800 watts in mono, the MC402 delivers power that is fully balanced from input to speaker output. The extraordinary quad-differential design of the MC402 actually consists of four complete amplifier circuits. Each channel contains two amplifier circuits, each the mirror image of the other, whose outputs are combined in the unique McIntosh Output Autoformer® resulting in totally balanced operation from input to speaker output and the cancellation of virtually all noise and distortion.

The exclusive McIntosh Output Autoformer® is a handcrafted matching device that provides an ideal impedance match for all speaker types regardless of their rated impedance. Any departure from an optimum impedance match increases stress on the amplifier which threatens a rise in distortion as well as a reduction in the life expectancy of the amplifier. McIntosh Output Autoformers® enable the MC402 to operate at maximum efficiency and to always deliver full power, without stress, to any type of loudspeaker.

Exclusive McIntosh

Power Assurance System - A collection of technologies that enhance performance and reliability while protecting the amplifier and loudspeakers.

Power Guard - A waveform comparison circuit continuously monitors both input and output signals. Power Guard dynamically adjusts the input level to avoid clipping while preventing harsh sounding distortion.

Sentry Monitor - Fuse-less short-circuit protection circuit disengages the output stage before current exceeds safe operating level – resets automatically.

Thermal Sensors - Protects against overheating if cooling air is blocked and output transistors become too hot.

DC Failure Protection - Protects speaker against output circuit failure. Any DC current that appears in the output is shunted to ground by the output autoformer.

Exclusive Double Balanced Circuity - Each channel of the MC402 consists of two balanced power amplifiers operating in push-pull with their outputs combined in a McIntosh Autoformer. This double balanced configuration from input to output cancels virtually all distortion

Output Autoformer - Unique McIntosh technology delivers the full rated amplifier output with the least possible distortion into loudspeaker impedances of 2, 4, or 8 Ohms; you get all the power you paid for and the freedom to choose any loudspeaker.

Wattmeter - Swift, accurate response reveals program peaks so staying within the power limits of your loudspeakers is easy.

Turn-on Delay - Delays operation for about two seconds after turn-on, to silence any pops or thumps generated by other equipment.

Soft Start Inrush Protection - Eliminates component stress during turn-on. Theristors in the power transformer act as a cushion against inrush current

Balanced and Unbalanced Inputs

Balanced connections guard against induced noise and al-

low long cable runs without compromising sound quality.

Illuminated Power Meters - The Illuminated Power Output Watt Meters on the MC402 are peak responding, and indicate the true power output of the amplifier. The Peak Watt Hold Mode allows the meters to temporarily stay at the highest power output and then slowly decay. The Front Panel Meter Illumination may be switched Off at any time.

Fiber Optic Solid State Front Panel Illumination The Illumination of the Front Panel is accomplished by the combination of custom designed Fiber  Optic Light Diffusers and Light Emitting Diodes (LEDs). This provides even Front Panel Illumination, together with the extremely long life LEDs.

Glass Front Panel and Super Mirror Chassis Finish - The famous McIntosh Illuminated Glass Front Panel with a three dimensional look and the Stainless Steel Chassis with Super Mirror Finish ensures the pristine beauty of the MC402 will be retained for many years

Specifications

Frequency Response: 

20 Hz to 20 kHz, +0 / -0,25 dB

10 Hz to 100 kHz, +0 / -3,0 dB

Total Harmonic Distortion: : 0.005% max. at any level from 250 mW to rated power output

Intermodulation Distortion (SMPTE):  0.005% maximum if instantaneous peak output does not exceed twice the output rating

Signal-to-Noise-Ratio: (A-Weighted )

Unbalanced : 94 dB (120 dB below rated output)

Balanced : 98 dB (124 dB below rated output)

Power Output RMS (sine wave continuous average power output from 20 Hz-20,000 Hz)

Stereo :  400 W min.

Mono :  800 W min.  

Input Impedance

Unbalanced : 10,000 Ω 

Balanced :  20,000 Ω 

Output Load Impedance

Stereo :  Terminals for 8, 4, or 2 Ω 

Mono :  Terminals for 1, 2, or 4 Ω 

Input Sensitivity:  

Unbalanced :  2,0 V,

Balanced : 4,0 V

Wide Band Damping Factor:  Greater than 40

Dynamic Headroom:  2,1 dB

Rated Power Band:  20 Hz to 20 kHz

Power Guard:  Clipping is prevented and THD does not exceed 2% with up to 14 dB overdrive at 1 kHz

Power Requirements:  120V 50/60Hz, 10A

Dimensions (H X W X D):  444,5 x 239,7 x 508 mm  (17-1/2" x 9-7/16"  x 20")

Weight:  50.1kg (110,5 lbs. net); 5,1 kg (143,5 lbs. boxed)

 

McIntosh MA6500 amplifier

McIntosh MA6500

Introduce yourself to McIntosh quality with the MA6500 Integrated Amplifier

Hardly a "slimmed down" model, the MA6500 incorporates premium McIntosh technologies, including Power Assurance and Silent Electromagnetic Switching, as well as several features that will assist you as you integrate and expand your McIntosh system.

At the heart of MA6500's Power Assurance System is Power Guard clipping protection, input volume reduction that acts literally at the speed of light to keep distortion below 2% and deliver clipping-free output. Sentry Monitor current protection, Thermal Cutout, Turn-On Delay and Soft start inrush protection join Power Assurance to protect and prolong the life of your equipment.

Silent electromagnetic switching gives the MA6500 distortion-free switching. A glass tube containing oxygen-free gas and two signal leads sits in a copper coil and shock absorbent plastic, awaiting DC voltage to create a magnetic field that delivers the input signal and completes the circuit. 

Performance Features

Power Output

The MA6500 consists of two separate power amplifier channels, each capable of 200 watts and a sophisticated control center in one compact unit with less than 0.005% distortion.

Power Guard

Both channels include the patented McIntosh Power Guard circuit that prevents the amplifier from being overdriven into clipping with its harsh distorted sound that can also damage your valuable loudspeakers.

Electronic Input Switching

Digital Logic integrated circuits drive Electromagnetic switches on all six inputs and operating functions for reliable, noiseless, distortion free switching.

Speaker Switching

Front panel Speaker push-buttons control two switched outputs that allow you to send signals to two separate pairs of loudspeakers.

Sentry Monitor and Thermal Protection

McIntosh Sentry Monitor power output stage protection circuits ensure the MA6500 will have a long and trouble free operating life. Built-in thermal protection circuits guard against overheating.

Illuminated Power Meters

The illuminated power output watt meters on the MA6500 are peak responding, and indicate the power output of the amplifier

Specifications

Power Output:  Minimum sine wave continuous average power output per channel, all channels operating is:

200 watts into 4 Ω  load

120 watts into 8 Ω  load

Rated Power Band:  20 Hz to 20,000 Hz

Maximum Total Harmonic Distortion (at any power level from 250 milliwatts to rated power output is):  0.005% for 4 or 8 Ω  loads

Dynamic Headroom:  2.4 dB

Frequency Response

+0, -0.5 dB from 20 Hz to 20,000 Hz

+0, -3 dB from 10 Hz to 100,000 Hz

Sensitivity

Phono :  2.5 mV for 2.5 V rated output (0.5 mV IHF)

High Level :  250 mV for 2.5 V rated output (50 mV IHF)

Power Amplifier Input :  2.5 V for rated output

Signal To Noise Ratio (A Weighted)

Phono Input :  90 dB (84 dB IHF) below 10 mV input

High Level :  100 dB (90 dB IHF) below rated output

Power Amplifier :  110 dB below rated output

Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20 Hz to 20,000 Hz, with all channels operating is:  0.005% for 4 or 8 Ω  loads

Input Impedance

Phono :  47 K Ω , 65 pF

High Level :  22 K Ω 

Maximum Input Signal

Phono :  90 mV

High Level :  8 V

Preamplifier Maximum Voltage Output

Phono :  8 V at tape output

High Level :  8 V at tape output

Main Out :  8 V at preamp output

Voltage Gain

High Level to Tape: 0 dB

High Level to Main: 20 dB

Damping Factor

120 at 4 Ω 

230 at 8 Ω 

Tone Controls

Bass :  ± 12 dB

Treble :  ± 12 dB

Power Requirements

100 Volts, 50/60Hz at 7.4 amps

110 Volts, 50/60Hz at 6.2 amps

120 Volts, 50/60Hz at 6.2 amps

220 Volts, 50/60Hz at 3.1 amps

230 Volts, 50/60Hz at 3.1 amps

240 Volts, 50/60Hz at 3.1 amps

Overall Dimensions

Front Panel: 17-1/2 inches (444,5 mm) wide, 7-1/8 inches (181,0 mm) high.

Depth behind front mounting panel is 16-1/2 inches (419,1 mm).

Clearance required in front of the Front Panel is 1 inch (25,4 mm) for knobs.

Weight

33.8 Kg (74.5 pounds) net, 41.7 Kg (92.5 pounds) in shipping carton

 

Sony ST-V7 tuner

 Sony ST-V7 Remote Controlled AM/FM Tuner

Direct Comparator Quartz Synthesis AM/FM Tuner with Supplied Remote Control

Key Selling Feature : Remote Control

Remote control is one convenience feature that makes an appreciable difference. That's why Sony has included a remote commander as a supplied accessory with the ST-V7. The commander controls the 8 station presets on this tuner. But its capability extends far beyond this . When used with the matching TA-V7 amplifier, it controls function, volume, tape monitor, acoustic memory and muting. Add a compatible Sony turntable and cassette deck, and you have a total remote control system.

Key Demonstration

Be certain to display the tuner with the matching TA-V7 amplifier. make sure to point out the benefits of the supplied remote control. If the customer is a novice, you should let him know that the remote control receiver is built-in. Then, use the remote control and the tuner as a stepping stone to sell the TA-V7 amplifier. Point out the matching cosmetics. Raise the volume by remote. Switch from preset station to preset. Then , as the clincher, show the customer how you can recail precise tonal settings with the acoustic memory button.

Technology Features

Quartz Frequency Synthesis - the most accurate , most convenient tuning system

Sony's Exclusive Direct Comparator - provides exceptionally quiet FM reception

Extraordinary FM S/N Ratio - 84 dB in mono, 78 dB in stereo

Buil-in Lithium Battery - to maintains preset station memory.

Convenience Features

Supplied with RM-V70 remote control capable of the following functions:

AMP - function, volume, tape monitor, acoustic memory, muting

TUNER - 8 station presets

TURNTABLE - Cue, start, and stop

CASSETTE DECK - Forward play, reverse play, fast-forward, rewind, stop, pause and Automatic Music Sensor

Microprocessor tuning with manual "step" tuning up and down

8 station memory presents with random assignment of Am and FM stations

Multiprocess memory stores the frequency, mono/stereo mode, and muting condition of each preset station

Memory scan provides a four second sample of each preset station

Fluorescent multi-function display indicates received frequency, muting mode, FM or AM reception

Three-LED signal-strength meter for optimum antenna positioning

Back-panel Beep Tone switch : beep tones indicate remote command has been received

System power switch can turn on entire music system

"Membrane" style feather-touch switches

14" size and cosmetics complement Sony's other V-series components

Back-panel control cables for other compatible "V" series components

Specifications

FM Tuner Section

Usable Sensitivity (Mono)

10,3 dBf/1,8 µV 

50 dB Quieting Sensitivity:

Mono :  16,1 dBf/3,5 µV 

Stereo  :  37,9 dBf/43 µV 

Signal-to-Noise-Ratio: 

Mono :  84 dB

Stereo:  78 dB

Total Harmonic Distortion: 

Mono :  0,08%

Stereo :  0,15%

Intermodulation Distortion

Mono :  0,08%

Stereo :  0,15%

Frequency Response:  30 Hz - 15 kHz +0,5 dB -2,0 dB

Stereo Separation:  50 dB at 1 kHz

Alternate  Channel Selectivity (at 400 Hz) :  80 dB

Capture ratio:  1,0 dB

AM Suppression:  60 dB

Image Rejection:  80 dB

Spurious Response:  100 dB

IF Response:  90 dB

RF Intermodulation (IHF):  74 dB

Muting/Tuning Threshold:  25 dBf

AM Tuner Section

Quieting Sensitivity:

Built-in antenna :  200 µV /m

External antenna :  30 µV /m

Signal-to-Noise-Ratio:   55 dB at 50 mV/m

Total Harmonic Distortion:  0,3% at 50 mV/m; 400 Hz

Selectivity (10 kHz):  38 dB

Image Rejection:  45 dB

General

Output Level/Impedance:  750 mV/4,7 k Ω 

Power Requirements:  AC 120 Volts, 60 Hz

Power Consumption:  17 Watts

Dimensions (W x H x D):  355 x 55 x 270 mm (14" x 2-4/8" x 10-5/8")

Weight:  3 kg (6 lbs 10 oz)

Supplied Accessories:  RM-V70 remote control

NEC A-10 amplifier

NEC A10

The revolutionary Compact Disc places severe demands ion all equipment in the audio chain, particularly the amplifier. In order to reproduce ultra wide dynamic range music from digital sources with maximum accuracy, an amplifier must be able to reproduce high-energy transients at low distortion levels. The NEC A-10 is just such an amplifier, because it was specifically designed for the digital age.

The deficiencies of conventional power supplies.

A conventional amplifier power supply uses a capacitor-input filter" in its rectifier circuit in order to smooth out the current going to each of the amplifier circuits. However, in a common rectifier, the current at the filter output is not as smooth and steady as it should be. Instead, it fluctuates. This occurs because as one filter charges, the other discharges in a seesaw fashion. Extra loud musical passages place a massive current drain on the power supply. If this occurs when the current at the output of the filter is on the decline, the power-supply impedance will increase, which, in turn, causes a clipped waveform at the amplifier's output. the result is distortion.

The NEC Reserve Power Supply - more power for more solid bass.

The NEC Reserve Power Supply utilizes a switching circuit which instantly charges one filter the moment the other filter stops charging and starts discharging. Composite filtered current is much smoother and steadler. This keeps power-supply impedance constantly low, so that clipped waveforms do not occur even under heavily loads. The sound you hear is essentially devoid of distortion at all power levels, with bass sounding rich and powerful even during the loudest passages.

Sophisticated power supply design.

The NEC A-10 has a sophisticated power supply design that uses independent supplies for the phono amps (used with moving coil and moving magnet cartridges), buffer, voltage amp, and current amp. Moreover, to supply the power output stages, the Reserve Power Supply provides a big power reservoir for solid performance. NEC's sophisticated power-supply design assures consistently low distortion and solid, powerful bass reproduction at all output levels - the reason why the A-10 sounds far more powerful than its power rating suggests.

High-gain head amp for moving-coil cartridges.

The NEC A-10 features a separate, high-quality head amp for moving-coil cartridges to extract all the delicacy and subtlety MC cardridges are renowned for. Its high equivalent input noise of -154 dBV (at 90 µV /10 Ω ) is a good indication of the high caliber of this pre-preamp.

Simple Design

To ensure that the signal path is as simple and straight as possible, no tone control system is included in the A-10. In instances where tone control is needed or desired, NEC recommends that the A-10 be matched with a separate, high-performance graphic equalizer.

Specifications

Power Amplifier Section

Rated Output (both channels driven at 20 Hz - 20 KHz)

120 W + 120 W into 4 Ω 

60 W + 60 W into 8 Ω 

Total Harmonic Distortion:  0,003% or less (at rated output)

Intermodulation Distortion:  0,003% or less (at rated output)

Power bandwidth:  5 - 300 kHz 

Input Sensitivity:  1,23 V

Preamplifier Section

Input Sensitivity/Impedance

Phono MM :  2,5 mV/47 k Ω 

Phono MC-1 :  80 µV /10 Ω 

Phono MC-2 :  250 µV /100 Ω 

Tuner :  150 mV/30 k Ω 

Tape 1, 2 : 150 mV/30 k Ω 

CD :  150 mV/30 k Ω 

Aux :  150 mV/30 k Ω 

Output Level/Impedance 

Rec Out :  150 mV/100 Ω 

Preamp Out :  1,23 V/600 Ω 

Phono Overload Capability:  300 mV (MM)

Signal-to-Noise-Ratio: 

Phono MM :  90 dB (-142 dBV)

Phono MC-1 :  72 dB/90 µV  (-154 dBV)

Phono MC-2 :  83 dB/250 µV  (-154 dBV)

Tuner :  110 dB (-126 dBV)

Tape 1, 2 :  110 dB (-126 dBV)

CD :  110 dB (-126 dBV)

Aux :  110 dB (-126 dBV)

Subsonic Filter:  15 Hz (-3 dB, 6 dB/oct.)

Power Requirements :  100/ 120/ 220/ 240 V AC, 50/60 Hz

Power Consupmtion:  335 W

Dimensions (W x H x D):  430 x 150 x 430 mm

Weight:  20 kg