Been gifted with Accuphase P-300...

[jinjuku]

What is the general scoop on this amp? Thing looks practically brand new...

 

[Alex2507]

Looks like a good deal for the price.

A friend of mine is always talking about amps from back in the day but he always gets Accuphase ans Phase Linear confused. TLS or Walter might know stuff and dare I say Rick ... he's pretty old too.

I just took a quick peak and saw that it's weight/watt seemed rather excessive. You better start working out if you're going to heft that thing around.

I'm sure you know that Audiokarma is the site for those old beasts.

I know, I know ... nearly useless but I wanted to see this get bumped before it slid off page 1.

 

[jcl]

From what I remember Accuphase has always been expensive, but I think respected gear. Never anything that I would look at, except say in a magazine.

Did you check out their website? According to that the p300 is from ~ 1973.

Here's a sales flyer with some info from their 'product museum' -
http://www.accuphase.com/cat/pcten.pdf

They do have a number of later revisions of the p300 listed, so maybe yours is newer?
Accuphase Laboratory, Inc.　Product museum

 

[walter duque]

Never did own one of these. Had a few Sony power amps almost like that, with the 1/4-1/2 and full output controll. The Sony amps where great and this one seems to be even a better build and most likely more expensive. The Sony amps where not cheap either, I think they put out 140 watts@8ohm. Rick has them now and I do believe they are still working.

 

[Rickster71]

Accuphase made some really great tuners.
All nice stuff in general.
It does depend on what transistors are in the amp: Amplifier Repairs in the North West of England and information about hifi equipment.

 

[jinjuku]

The amp is one year younger than me I appreciate the gifting of it but really don't see myself putting any $$ or time into it....

Thanks for all the feedback. Any ideas what I could sell this for to someone what would have appreciation for it?

 

[Alex2507]

Any ideas what I could sell this for to someone what would have appreciation for it?

It's really not worth much but I could sure use me an amp for my 360's.

 

[jinjuku]

It's really not worth much but I could sure use me an amp for my 360's.

You pay shipping plus $50 for me boxing it up. Send me a PM...

 

[Alex2507]

Thanks Jin but after reading Rick's link and something else I found on AK I have to pass. I'd like to be better at restoring stuff but I've had old gear beat me a few too many times to bet on my skills in that arena.

 

[Stereojeff]

From my memory, the P-300 dates to 1975 when Teac was distributing Accuphase in the US. Great equipment in general. I owned the preamp and the tuner but did not purchase the amplifier as it had a tendency to shut-off driving 4 ohm loads.

Jeff

 

[jinjuku]

From my memory, the P-300 dates to 1975 when Teac was distributing Accuphase in the US. Great equipment in general. I owned the preamp and the tuner but did not purchase the amplifier as it had a tendency to shut-off driving 4 ohm loads.

Jeff

Yep, it has the TEAC sticker on the back and built in Japan.

 

[shepmon]

Yep, it has the TEAC sticker on the back and built in Japan.

Hi. I just saw this thread and joined audioholics to respond. If your still want to part with the Accuphase, I am interested. Thanks, Bob

 

[TLS Guy]

What is the general scoop on this amp? Thing looks practically brand new...

The Accuphase P-300 is a first generation "super" amp.

A little history.

D. T.N. Williamson developed the first push pull tube amp with negative feedback in 1947.

Harold J. Leak refined it and broke the 0.1% distortion barrier. This basic circuit defined Hi-Fidelity for around 20 years.

Tobey and Dinsdale developed the push pull transistor class B amp in 1961. They sounded awful and were unreliable. There were many examples, but likely none still working.

Peter Walker with D. T.N. Williamson worked to produce a solid state amp with comparable quality to tube amps. The Quad 303 appeared in 1969. This was A/B bias and was 45 watts per channel. It was very reliable due to an underrated triple output stage.

In the early 70s a number of transistor "super" amps appeared, which were direct coupled to the load. These were in the 150 to 200 watt per channel range. The output devices were not reliable and most had no speaker protection from DC offset when the power transistors blew which was frequent.

The Accuphase P-300 was one of the few that did and had relay speaker protection. However relay protection is relatively slow and these amps can still destroy speakers.

Power is 200 watts into 4 ohms and 150 watts into 8 ohms.

Last year of production I think was 1973.

I really do not recommend using these early transistor "super" amps, for reasons of reliability and the presence of significant crossover distortion.

Most of us used tubes well into the seventies. I switched from a DIY Williamson design in 1972 with the Quad 303. It's still going and I have never opened the case.

 

[AcuDefTechGuy]

Looks nice.

 

[azlake]

Hi evryone ) I'm desparately seeking a Owner's Manual = User Guide for the 'gifted' P-300 - pdf would do . Would like to swap with whatever is needed if I have ...