Hi - I'm not a techie at all, so bear with my ignorance, please.

I use a E-H Holy Grail reverb in the (passive) effects loop, and while it sounds fine on the clean channel, switching to overdrive makes it break up into really nasty digital distortion. Would it be possible to add a pot at the loop input to reduce the amount of signal going into the loop?

Thanks in advance for your help.

Thanks, but that really doesn't answer my question.

I breathlessly await relevant responses.

Well, I'd *rather* not have to buy an extra piece of equipment or have yet another box to deal with. My thinking was that if I can reduce the gain into the effects loop, there is enough overhead (spare volume) in the amp to make up for the reduction, or am I wrong?

If I were to add a potentiometer, what value should it be?

Thanks again for any help.

I would use a 1M pot, which is similar to the input impedance of both the Dumblator and the Klein.
(A 250K pot might roll off some of the high frequences in the signal). Remember not to use too use long connection cables, which might also roll off highs.

Tip: If you have a small booster pedal, you can put this after the reverbpedal in order to get the signal up to the same level as before the pot. Your signal path would look like this:

Overtone preamp (send) => 1M pot => reverb pedal => boost pedal => (return) Overtone poweramp

This way you get the essence of a Klein/dumblator, even though a klein or dumblator would be superior.

I've been all over the ceriatone product page...where does purchase this mythical Klienulator?

Thanks for the link...not sure why I couldn't see the damn thing on the product page

You guyz are right about the gain getting all fucked up without the buffer.  I used my Overtone at a gig for the first time with a pedal board in the effects loop and I had distortion on the clean as well as the drive.  Ya know what?  Even with that, this damn thing sounded pretty fuckin sweet!    I even got compliments from the other guys in the band.  If you've read any of my other posts about this amp you'll know that I have had less than glowing things to say about it but, maybe I've been converted after all... PRAISE THE LAWD!