I've used a BDDI through the FX send/return on my amp before and got great tube warmth. I found that I couldn't get any grit without having massive hiss from the gain setting. Could I add a Sansamp GT2 in tha chain (amp send > BDDI > GT2 > amp return) and add non-hissy grit to my sound? Would turning the GT2 on while the BDDI is on make the sound too thick or boost the volume too much? How could I make this work? Any ideas?
I don't see why it can be a problem. Both have level controls. You can also try putting the GT2 before your amp.
What bass are you using? What are the settings on the Blend/Treble/Presence Controls? Too much treble boost could cause this. Or your bass has a very low output. Another possibilty might be that the FX send does not drive your BDDI hard enough, leaving the Drive control on the BDDI doing the job of boosting the signal
At the time I was using a Jazz bass with Dimarzio Ultra Jazzes. Right now I have a Carvin LB70P which had plenty of headroom, but I don't want added hiss. I found that any grit that the BDDI gave came at a hissy price from boosted gain levels.
I have always worked on this rule of thumb: distortion based effects between bass and amp, time based between preamp and power amp. I have a feeling that running the SABBDI after the preamp would increase the hiss... KNock the presence down a bit. Guitar based effects will "de-bass" your distorted bass sound as they compress the whole sound rather than just a selected part of it. I mean, you can't adjust affect level. IIRC.
Yes. And a volume pedal after your distortion pedal and before your amp in or preamp, so the volume knob on your bass basically adjusts your distortion, and your volume pedal adjusts your actual volume.