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Old 12-13-2012, 10:34 PM   #1
Anthoje
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Solo switch in amp is before or after pre-amp?

Quick question:

I am cabling my new pedalboard and was wondering if a solo switch that is built-in in an amp is:
before the pre-amp section?
after the pre-amp section, before the fx loop?
after the fx loop, before the power amp?

In case it matters my amp is a Carvin V3M.

Thanks!
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Old 12-13-2012, 10:40 PM   #2
NakedInTheRain
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i'm not familiar with the solo switch, but if it's an eq thing, it'll be before the preamp, before the fx loop, and if it's a boost thing, it'll be after the fx loop, before poweramp.
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Old 12-13-2012, 11:02 PM   #3
Cathbard
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I can't find a schematic, find one and I'll tell you for certain what it's doing.

Here's how to work it out empirically. Keep the volume down fairly low so that even on boost there's not going to be any power amp distortion.
Now hit the boost switch - did the distortion increase or just the volume? If the former, it's before the preamp. If it's the latter, it's after the preamp.
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Old 12-13-2012, 11:08 PM   #4
Anthoje
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Just the volume was boosted using my footswitch, so it is after fx loop. And actually for first replier, I have a manual EQ boost switch on every channel. So this one is the boost before the pre-amp.

Thanks!
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Old 12-13-2012, 11:22 PM   #5
Cathbard
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Well you can't say it's before or after the FX loop without further testing but you've shown that it's after the preamp and that's the important part.
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Old 12-14-2012, 03:04 AM   #6
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Totally depends. On my YCV40 the boost is a gain and bass boost, but other amps, I think it would be different.
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Old 12-14-2012, 03:06 AM   #7
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Depends on the amp.

Mark V just boosts volume.


Any reason you are asking TS?
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