I' m running an epiphone thunderbird (passive), in to a EHX Bass Preacher, running into a EHX Bass big muff pi deluxe, running in to the input of a Fender Rumble 500w combo, which is chained to a GK 1x15 Goldline. Tonight was the first night we tried running the compressor and the Big Muff together . For whatever reason, we could NOT get the same kinds of volume levels we were getting prior to the pedals . I can't figure out why . (Side note, I heard intermittent crackling through something, and I'm pretty sure I nailed it down to a bad cable going from the bass to the compressor, and I realize that could be the problem). Pedals have fresh batteries. The compressor settings are volume at 11 o clock and sustain at 11 o clock , fast attack . The big muff settings are volume at 1230, blend at 11, tone at 2, sustain at 2, noise gate at 7 ( barely engaged), high pass at 2 (we tried multiple settings ), and the low pass was at 10 (also tried multiple settings . We dial in a clean tone on my amp, then added the effects, tweaked them at lower volume, then added volume . It still didn't achieve decent volumes without cranking the pre gain and master to 1-2 o clock . Picture is attached for the settings . Any and all help is appreciated.