Well I went back to my SMM just to double-check since if I noticed any volume drop before, that would be enough for me to take it back off my board and keep searching ... but I've always loved that all the EHX pedals I have owned were at unity gain without havng to fuss with a volume knob on the pedal or utilize my boost.
My SMM is incredibly conistent in delivering back the delay at the same volume. I even put the BLEND all the way clockwise so it was only the pedal signal coming through ... not one iota of volume drop. With the FILTER knob turned all the way counter-clockwise, taking away higher freqs, the tone doesn't cut through so there may be a percieved volume drop ... but there isn't ... it just obviously won't cut through a mix as well, and just doesn't sound good IMO ... that setting makes more sense for guitar than for an instrument that is already "bassy".
The only other thing that I think could impact where the tone sits in the mix is if the DECAY and BLEND are simultaneously set too high ... too "reverby" with it sounding like the bass is down a long tiled hallway 100 yards away. That's just how those controls work on any delay pedal though, and not a fault of the pedal ... it's just a weird setting.
The Memory Toy was similar in that the volume was dead-on consistent regardless of where the BLEND knob was set.
Oh ... both pedals are / were also in an effects loop so there's no difference whether or not they are in the signal chain even when they are off. No added noise to the chain, no volume drop or tone suck, etc.
interesting. I might have to check one out.
lol)