#1
i have had my mxr phase 90 for a few months and have had it in the same spot in my chain but whenever i engage it, it gives an undesirable volume boost (usually when i'm using it with distortion). My current chain is this:

guitar>wah>ds-1>sd-1>phase>chorus>amp

any suggestions to eliminate the volume boost? thx
Gear:
Schecter C-1 Classic
Crate fxt65
Boss CE-5 Chorus
Boss SD-1 Overdrive
Boss DS-1 Distortion
MXR Phase 90
Dunlop Crybaby Wah
#2
that's unfortunately a common problem with MXR phase 90's

there is an 'R28' mod which you can do (look it up on google), which is relatively easy in theory, but doing it to mine just made matters worse.

In the end I sold mine and am awaiting an EHX small stone in the post