Looking for info on Alison Research Kepex compressor modules?

[Aloha]

Ever hear of these? They look pretty cool, seen afew for sale awhile ago. Need any info anyone might have.

[Aloha]

Need info specifically on the gain brain compressor and the kepex noise gates

[Rick Sutton]

I had a rack of the original Allison Gain Brains and Kepex's in the 70's. They also came out with a series 2 that was supposed to be a step up in quality, although I only used those at other studios and didn't log enough time on them to say much. The original Gain Brains were more like a limiter than a compressor...I think they were a 20/1 ratio and smacked pretty hard. Not a subtle unit. The Kepex was a fairly normal gate and I used it on toms and kick. Later the Allison company morphed into Valley People and produced a combo unit, the Dynamite, that can limit or gate. I sold my kepex/gain Brain rack long ago and really never missed it although I still keep a stereo Dynamite around that is useful in the expand mode for guitar amp noise elimination. Just as a note of interest, Paul Buff ( an LA studio owner in the sixties and I believe did some of Zappa's early stuff) was the man behind Allison and Valley People. Cheers, Rick

[MIKEHARRIS]

Allison Research became ValleyAudio...which made the first cool (affordable)digital compressor...Valley became part of Galaxy audio...the HotSpot monitor folks..and they may have info in their archives

[Aloha]

Thanks

[Bob Olhsson]

The Keypex was probably the first gate that really worked decently. Fairchild made a gate earlier but it was something I avoided using like the plague.

It feels a bit strange to think of a Keypex as "vintage gear." Come to think of it, it feels a bit strange to be over 30!

[juniorhifikit]

I have an Alison rack that has 11 Kepex gates and 2 Gainbrains. I certainly don't need 11 noise gates, but would like a couple more of those FET limiters. Anyone want to do some trading?

[bluheron]

I have two Gain Brain 700 cards I am not using, but I can't figure out their value. Interested??

[geoffdake]

The Kepex was made by Allison Research and was not a gate[, but an expander. A gate turns on at it's threshold like a switch. An expander's output is proportional to it's input. It's like a compressor inside out. The first Kepex was all discrete. The Kepex II used a vca. They were the creation of Paul Buff. Allison was his wife. When they divorced, it began to unravel. Paul now makes professional photographic studio lighting.

Geoff

[Philip S Bova]

The original FET Gain Brains are great little units. They get used around here for Bass during mixdown sometimes.


philip

[bluheron]

Alison Research Kepex Model 500 card for sale - as is

Make offer. I don't know if it works, but the rack mounts worked with my Gain Brains.

send e-mail to folk.and.blues.project@gmail.com

Bob Friedman

[George Necola]

Or check my add in the classified.. 2x gainbrains ans 2 kepex