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-   -   Nakamichi PA-7 and PA-5 amps (http://www.diyaudio.com/forums/pass-labs/165673-nakamichi-pa-7-pa-5-amps.html)

Redwingnine 24th April 2010 02:13 AM

Nakamichi PA-7 and PA-5 amps
 
Hello all,

New to DIY audio.

I just picked up a pair of PA-7's and a PA-5 for use with the music and HT rig. I recently picked up a pair of Legacy Signature III's for the front, and a Legacy Silver Screen for the center channel. Will be using Polk LSI 15's for the rear speakers.

I am really impressed with the sound of the Nak amps. I've been told that they are basically the same as Threshold amps.

Can someone provide some more background? Thanks!

john65b 24th April 2010 02:24 AM

They are both Stasis amps designed by Nelson Pass...while not class A, still very good amps...

I made three attempts to purchase, but just never could get my hands on one. The PA7 MKII is the one to get...

Redwingnine 24th April 2010 02:27 AM

What is the difference between the orignal and the Mark II? Is that something that could be done as a DIY effort?

jam 24th April 2010 04:31 AM

I would go with the Mk1. I believe that Nakamichi scewed with Mr.Pass's original design in the Mk2 and it does not sound as good despite better distortion numbers.

Jam

Redwingnine 24th April 2010 04:38 AM

Quote:

Originally Posted by jam (Post 2164502)
I would go with the Mk1. I believe that Nakamichi scewed with Mr.Pass's original design in the Mk2 and it does not sound as good despite better distortion numbers.

Jam

Thanks, Jam.

As it turns out, I have obtaind 2 PA-7's and 1 PA-5 (MK1).

I did see a thread where Mr. Pass had designed an updated driver board for the PA-7. I might look at that to see just what the update does.

So far, I really like the PA-5. It's a great amp, with lots of reserve power and excellent control of the bass drivers. I can't wait for the PA-7's to arrive next week.

jam 25th April 2010 03:12 PM

All things must Pass
 
Redwingnine,

Send me an e-mail. I think I have a copy of the service manual if you want.
I believe that Mr.Pass scored a winner with the Stasis output stage which in my humble opinion is far better than most traditonal topologies. I used to have a PA-7 which still rivals most contemporary designs. I am sure a few mods would turn it into a giant killer..........bummer, I should have kept my PA-7.....like all Mr.Pass's designs it stands the test of time.

Regards,
Jam

Redwingnine 28th April 2010 10:52 PM

Thanks, Jam

ROGER WILCO

jam 29th April 2010 05:03 PM

You should post pictures.

Jam

Nelson Pass 29th April 2010 06:20 PM

Quote:

Originally Posted by Redwingnine (Post 2164506)
I did see a thread where Mr. Pass had designed an updated driver board for the PA-7.

I don't recall doing such a design.

:cool:

Redwingnine 29th April 2010 11:20 PM

Quote:

Originally Posted by Nelson Pass (Post 2170271)
I don't recall doing such a design.

:cool:

Oops!

Here is the thread has has a drawing of it:

What speakers to pair with Nakamichi PA 7 - AudioKarma.org Home Audio Stereo Discussion Forums


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