boss es-8 levels issue

[Cokers4]

i'm setting up my es8 and I'm trying to match volume levels. there is a substantial volume drop between when i have the es8 active (no active loops) and when i bypass the es8 is there a way to fix this i have already maximized the output buffer to +6db. I use my polytune's input buffer.

[Pepe]

That sounds like a very strange issue. Normally you would expect to have a slight volume boost, but not such a significant volume drop. I don't know if someone of our long-time members have the ES-8. Hopefully you will find a solution soon.

I just had a quick look at the manual. Does it change its behaviour if you switch the input buffer on or off?

[Cokers4]

I figured out that bypassing the es 8 in the 4 cable method removes the preamp (in the volume loop) causing the drop in volume