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Vintage Gretsch Professional Hi Fi Electromatic Guitar amp - pics/video

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Guitars331 of 4371930's Gibson L-OO?Old 5-string, don't know what kind????????? need help.
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Posted 7 years ago

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I was wondering if anyone has any info on this amp. I bought it off of Craigslist along with a Harmony h306. I can't find any info about it anywhere. It has a tube preamp, a tube amp and a built in spring tremolo/reverb. 2 12" unknown speakers and a space where 2 tweeters are supposed to be from the look of it. According to the previous owner it was in storage for several years but when I plugged it in, it fired right up and plays sounds great. I'm just learning to play the guitar so I can't play music on it yet. If anyone knows what this is please let me know.
It looks a lot like the amp in the bottom of the second pic except the controls are different and slightly more modern looking. That's as close as anything I could find to my amp.


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  1. Joe, 7 years ago
    I think your amp was maybe made by the Valco company, and the tone controls are active, Hi-Fi, rather than passive like almost all guitar amps.
    Google: Terry Dobbs, "Mr Valco" he will be able to give you all the info you need
    good luck !
  2. Jack Albright, 7 years ago

    Do you still have this amp ? I have a chassis for one just like it but ther are no schematics available anywhere. Does yours have a schematic insided the cabinet ? If so, maybe you could send me a scan of it or some pictures of the circuitry. Any help you could give me would be greatly appreciated

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