what are you listening to?

BlazeES

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Sony Metal Master FTW !
What's the rating on that N-77 Tony??
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).

Quality

Made in Japan.


Courtesy of Ken Rockwell
 
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orange

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Broken beyond repair but highly affable
A repeat of the morning news...avalanches and flooding nearby and around Idaho.
 

BlazeES

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Sony Metal Master FTW !
Nice specs Tony, that residual noise spec is phenomenal for an amp.

Ya need to measure that..
Yeah, I do look forward to measuring that - and checking out my assortment of tape decks too.
Hopefully in a week or two I'll be ready to go. AP is slow but I don't want to rush them.

I can't imagine the noise floor being electrically up to snuff after 30 years but who knows.
I do know this - my ears tell me this amp is damn quiet and packs a lot of dynamic punch, so maybe it's still close to spec.
 

orange

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Broken beyond repair but highly affable
Supposed to be a blizzard coming soon... any news on that?
I have no idea what the weather is like in South Carolina, just continuing avalanche warnings in the usual mountain areas of Idaho and stuff.
 

BlazeES

Veteran and General Yakker
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Sony Metal Master FTW !
Listening to what I've labeled as 'tape zero'.
All of my Metal Master mix tapes get a serial number and creative names depending on content & mood.

It's the first ever mix recorded on my TC-K870ES - circa 1992 - with my favorite tracks off of Eric Johnson's 'Tones' and 'Ah Via Musicom' albums on one side & a mix of Aerosmith, John Cougar Mellencamp tracks on the other.

Listening to this tape reminds of all the prognosticators and their BS about cassette tapes losing high frequency content over time. This tape sounds just as good as the day I recorded it. Pretty amazing considering it's been moved, stored, handled across 4 different 'States' of residency and probably played in excess of 100 times...

It's also a testament to the reliability of the deck.

IMG_20190416_1.jpg

IMG_20190416_2.jpg
 
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