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Higher output with reverb on mod/tweak?
First post! 
I have a Rivera S120 2x12 combo that I absolutely adore but when I turn on the reverb I get a noticeable drop in output volume. It's been like this since I got the amp, used, about 10 years ago but since I almost always have the reverb on (at about 3.5-4.0) I've always just turned up the master a notch to compensate.
I've thought about having someone look at it over the years but I've never really been bothered by this too much until two days ago when I was testing various newly acquired pre-amp tubes. I was recording some riffs into Sound Forge, swapping tubes, recording the same riffs again (keeping the same settings, of course), etc., in order to quickly A/B the sound of the tubes. Then I tried it with and without reverb... well, it seems I'm losing about 4 to 5 dB with the reverb on, regardless of which tubes I'm using. Funny how seeing the problem this graphically kicked in my anal-retentive streak, lol.
This got me thinking about trying to fix this again and that there must be a reverb output pot/resistor or some kind of internal mixer adjustment I can do. Has anyone had a similar problem, know how to adjust the dry/reverb mix on a Rivera amp or know of a mod I can do to get the volume up with the reverb on? I'm not an electronics wizard by any stretch but I can do basic troubleshooting and I'm comfortable with a soldering iron.
I have a Rivera S120 2x12 combo that I absolutely adore but when I turn on the reverb I get a noticeable drop in output volume. It's been like this since I got the amp, used, about 10 years ago but since I almost always have the reverb on (at about 3.5-4.0) I've always just turned up the master a notch to compensate.
I've thought about having someone look at it over the years but I've never really been bothered by this too much until two days ago when I was testing various newly acquired pre-amp tubes. I was recording some riffs into Sound Forge, swapping tubes, recording the same riffs again (keeping the same settings, of course), etc., in order to quickly A/B the sound of the tubes. Then I tried it with and without reverb... well, it seems I'm losing about 4 to 5 dB with the reverb on, regardless of which tubes I'm using. Funny how seeing the problem this graphically kicked in my anal-retentive streak, lol.
This got me thinking about trying to fix this again and that there must be a reverb output pot/resistor or some kind of internal mixer adjustment I can do. Has anyone had a similar problem, know how to adjust the dry/reverb mix on a Rivera amp or know of a mod I can do to get the volume up with the reverb on? I'm not an electronics wizard by any stretch but I can do basic troubleshooting and I'm comfortable with a soldering iron.
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