Vintage HiFi Audio Forum

Audio Discussion => List your system => Topic started by: non-prophet on April 15, 2017, 04:17:53 PM

Title: You gotta see this amp
Post by: non-prophet on April 15, 2017, 04:17:53 PM

Octave Research OR-1 pure class A amplifier.  This beast was designed by Andy Rappaport, based off of his amp-1, only with a spare no expense mentality, I think it retailed for $4000 ish in the early 80s.  The entire chassis is machined aluminum!  Weighs in around 70 lbs, 3 internal cooling fans, those caps...  Are you ready for this?  110,000 uf x 2 per channel!  utterly ridiculous.  Now the fun fact, it's only 42 wpc?  There are conflicting numbers between 85 and 42, 4 and 8 ohm.  I believe it to be 42 @ 8 ohm, it probably specs out around 80.  One sweet sounding amplifier, probably won't stay in my collection, I like power way too much.  But, still a fun amp to have laying around.  Enjoy these pics.

Title: Re: You gotta see this amp
Post by: Sir Thrift-a-Lot on April 15, 2017, 04:36:12 PM

But how many amps put out 42 watts of pure class A?   Don't most go A-B at around five watts?   (I may have this all screwed up, amps are not my forte.)

Title: Re: You gotta see this amp
Post by: Sir Thrift-a-Lot on April 15, 2017, 04:36:56 PM

I'd REALLY like to hear it once.

Title: Re: You gotta see this amp
Post by: non-prophet on April 15, 2017, 04:50:18 PM

In the first pic, the black amp next to the Octave.  My white audio labs a100, class A to about 75-85 then AB to 100, specs out around 165 wpc. 

Title: Re: You gotta see this amp
Post by: RuralTom on April 16, 2017, 04:32:58 AM

That's a gorgeous hunk o' aluminum right there!  What's you audition it on?

Title: Re: You gotta see this amp
Post by: Resident on April 17, 2017, 09:11:48 AM

Yeah I saw that amp on CL for a while.  Considered getting it but the drive for me was  bit to far.  Grats on a great amp, bet she does sound really nice.