Electro Harmonix Tri Parallel Mixer

I highly recommend this for any bass player who uses distortion pedals. I use it on an Ampeg stack with a Darkglass Alpha-Omega distortion, Behringer Ultra Metal or Super Fuzz and some additional clean tone or other effects coming from a Zoom B1Four and I can finally hear everything I love about all four of these tones at the same time, with nothing being lost. If you let in the high end from your bass to this setup it's like letting a mirror image of you but on regular guitar to play along.

One minor thing to complain is that my copy has one of the phase knobs slightly twisted, but this does not affect the functionality at all, I didn't even bother having it replaced or serviced with Thomann, the shipping hassle would be way too much much to deal with for me for a problem of this magnitude. Other than that the build is quite solid and I feel confident it won't break unless I really mishandle it.