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Earth Sound Research Amps [message #28339] Tue, 05 October 2021 13:11 Go to next message
Messages: 454
Registered: October 2001
Location: Georgia
Senior Member
This is somewhat topical, as I'm sure some of the members here are interested in Plush amps as well. I found this article today about Earth Sound Research:

http://www.pedalhaven.com/history-earth-sound-research-ampli fiers/

Apparently, their early amps were "copies" of Plush amps, and the later ones copies of Peavey amps. This is obvious by looking at them, but I was always curious about the background, if Earth was like a spinoff from Plush or Peavey, or if ex Plush/Peavey employees defected and took the designs with them. Turns out neither was the case, but they just got the amps and copied them as much as possible. Why they did that, I don't really understand. Also, apparently there never was any sort of litigation against them, they just folded due to financial troubles.

Also, I think Plush amps copied some Fender circuit designs, so in effect, the early Earth models were copies-of-copies. Weird.

Re: Earth Sound Research Amps [message #28340 is a reply to message #28339] Wed, 06 October 2021 07:57 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4451
Registered: June 2004
Location: NY
Senior Member
Earth amps are one of the few tube amps that I have never had come thru my shop, which is odd since they where made some 70 miles away from where I live.

I do however recall seeing them being sold in the Sam Ash chain of music stores near me back then.

I have worked on far more of the Plush amps and they 98 % copy's of Fender amps. Just in different cabinets!

From the gut pictures I have seen of the Earth amps and working on Plush amps, I would call it a toss up as to build quality!
Re: Earth Sound Research Amps [message #28341 is a reply to message #28339] Wed, 06 October 2021 12:42 Go to previous message
Messages: 1975
Registered: April 2003
Senior Member
Rodak, Thanks for that link.

I've seen a lot of the Peavey copy, Earth amps. I always assumed that they were knock offs to steal business from Peavey.

I know that I had read that Hartley sued them for copywrite infringement and won. His win was not because they stole the electronic designs or because they physically looked like Peavey product, but because they copied the pc board design which was protected by copywrite laws.

I think that Plush amps was run by Ron Lipsky. The circuits are 99% copies of Fender amps, with a diamond tufted version of the Kustom cabinets. They aren't built very well so they tend not to last very long.

And speaking of copies, Hartley often mentioned that Bud Ross was very helpful to him when he was just starting out. I find a lot of similarities in the early Peavey circuits with the K200-B designs.
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