Sony TA-N77ES Stereo / Mono Power Amplifier; Excellent Condition

This rare and classic amplifier is coming from the original owner in exceptional condition. It is working perfectly... all lights and meters are working as they should. Sound quality is absolutely breath-taking. It has tons of headroom... one of the most dynamic amps I've heard in a while. Ken Rockwell calls it "Japan's greatest power amplifier of all time."

Original owner's manual included.

Cosmetic condition of this amplifier is nearly mint. There is a tiny scuff on the front of the left attenuation control knob. There is one tiny nick on the back, left-hand side, bottom corner of the wood panel - completely out of sight. Otherwise, I do not see any signs of use... it is truly in exceptional appearance. See photos for details.

Made in Japan - 1987. Serial number is A700201

Inputs

30k Ω, 1 Volt.

Two pairs of gold-colored RCA jacks.

Input Sensitivity

1V for unspecified output.

Rated Power Output

200 watts per channel into 8 Ω from 20 - 20,000 Hz at less than 0.004% THD, both channels driven, from 250mW output to 200W.

230 watts per channel into 6 Ω from 20 - 20,000 Hz at less than 0.005% THD, both channels driven, from 250mW output to 200W.

270 watts per channel into 4 Ω from 20 - 20,000 Hz at less than 0.006% THD, both channels driven, from 250mW output to 200W.

Dynamic Power

300 W at 8 Ω.

370 W at 6 Ω.

520 W at 4 Ω.

800 W at 2 Ω.

660 W at 1 Ω.

Power Bandwidth (IHF)

10 ~ 100,000 Hz, 8 Ω or 4 Ω at 0.02% THD.

Dynamic Headroom (IHF 1978)

1.8 dB at 8 Ω.

2.8 dB at 4 Ω.

THD at 10 Watts

0.0018% at 8 Ω.

0.003% at 6 Ω.

0.004% at 4 Ω.

SMPTE IMD at Rated Output

0.004% at 8 Ω.

0.005% at 6 Ω.

0.006% at 4 Ω.

Damping Factor (8 Ω, 1 kHz)

0.004% at 8 Ω.

0.005% at 6 Ω.

0.006% at 4 Ω.

Slew Rate

150 V/µS.

(300 V/µS inside before the signal hits the output series inductors.)

Output Noise

< 35 µV, A-weighted.

SNR (IHF 1978)

120 dB, A-weighted.

Frequency Response

1 ~ 200,000 Hz, +0, -3 dB.

Power Input & Consumption

Varies by market.

Oddly rated 380 watts consumption for USA, even though rated to produce more than 400 watts continuous output.

It draws zero power when turned off because it has a real power switch. It's not like modern equipment that never really turns off and consumes power and remains a fire hazard any time its plugged in. The TA-N77ES is completely disconnected when switched off.

When switched-on, there is a 9.0 second mute during which it draws 30 watts. Even if ON, the meters are dark for those first 9 seconds.

The meter bulbs are rated a total of 7.2W (1.2W x 6 bulbs).

Actual measured power drain is:

Cold, idle
37.5w, meters off.
46.0w, meters on.

Warm, idle
43.5w meters off.
52.0w maters on.

1 W output, both channels
69.5w meters on.
61.7w meters off.

10 W Output, both channels
138w meters off.
147w meters on.

180 W output, both channels
597 W, meters on (0.859 V audio input, 115.6V from wall).

Warm Idle, if power supply rails at full voltage:
54.4w, meters on
47.7w, meters off.

Size

Overall: 7-3/8 x 18-5/8 x 17-3/8 inches HWD.

If you take off the fake wood side panels, what's left is standard 17" wide, but with nothing covering the sides! Unlike other Sony items with fake wood side panels, there is no metal case underneath on the sides.

Weight

55.125 pounds (25 kg).