What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Sony TA-N77ES (1987-1989)

The ES Series: The next step in digital audio, fromthe creator of the compact disc.

Sony has been the leader in both professional and home digital audio for over a decade. With such breakthroughs as PCM processors, Compact Disc Players and Digtal Audio Tape recorders. Now, the Sony ES engineerss, a dedicated group who are above the compromise between technology, convenience and price, have created the ES Series. Each component in the ES Series represents an ES engineer's dream. Once you.ve heard them, you'll want to own them.

The ES Series: Proof positive that Sony is still the leader in digital audio.

When the ES engineers created the ES Series, they had permanence in mind. These components will please their owners for years to come. All ES components, including our integrated amplifiers, tuners, cassette decks and digital processors, are designed with meticulous detail and built with extreme care. That's why Sony backs each ES component with a three-year parts and labor limited warranty.

The TA-N77ES:

Apower amplifier worthy of the Sony ES name.

Even the most advanced components require superior amplifier performance. The TA-N77ES deliveres 200 watts of continuous power per channel into 8 ohms and has the operating stability to deliver 660 watts ofdynamic power into a 1 ohm load.

A Spontaneous Twin Drive design with separate voltage and current stages helps reduce cross-interference. And the oversized power transformer and high-current non-switching discrete output stage provide additional power on demand.


200 watts per channel, both channels driven into 8 ohms, 270 watts per channel, into 4 ohms; Spontaneous Twin Drive (STD) design; 520 VA power transformer; non-conductive, low-resonance G-Chassis; high-current, non-switching discrete output stage.

System: Super legato linear, purecomplementary SEPP power amplifier, powerful power supply

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

Power consumption: 380 W (US model), 490 W (UK model)

Dimensions: (W x H x D) 470 x 185 x 440 mm, ( 18⁵⁄₈ x 7³⁄₈ x 17³⁄₈ inches)

Weight: 25 kg, (55 lb 2 oz) net

Continuous RMS power output (both channels driven simultaneously):

2 x 270 W (4 Ω, 20-20,000 Hz, THD 0,006%);

2 x 230 W (6 Ω, 20-20,000 Hz, THD 0,005%);

2 x 200 W (8 Ω, 20-20,000 Hz, THD 0,004%)

Dynamic power:

660 W, 1 ohm;

800 W, 2 ohms;

520 W, 4 ohms;

370 W, 6 ohms;

300 W, 8 ohms

Power bandwidth (IHF):

10 Hz - 100 kHz, (4 ohms, 0,02%)

10 Hz - 100 kHz, (8 ohms, THD 0,02%)

Dynamic haedroom ('78 IHF):

2,8 dB (4 ohms);

1,8 dB, (8 ohms)

Total harmonic distortion:

0,004%, (4 ohms at 10 watt output);

0,003%, (6 ohms at 10 watt output);

0,018%, (8 ohms at 10 watt output)

Intermodulation (IM) distortion (60 Hz: 7 kHz = 4:1):

0,006%, (4 ohms at rated output);

0,005%, (6 ohms at rated output);

0,004%, (8 ohms at rated output)

Damping factor: 100 (8 ohms, 1 kHz)

Slew rate: 150V/μsec, 300 V/μsec (iside)

Residual noise: 1 Hz - 200 kHz, +0 -3 dB

Input sensitivity: 1 V, 30 kohms

S/N (network) 78 IHF: 120 dB (A)

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