To Jbarker: The Diamond is extremely quiet, there's no detectable noise even with my earphones on. A plus on the EQ sweep knob which does wonders, note the tilt can be disabled via a toggle on the back of the unit. Transparent and allows enough headroom on a 9v for my Sterling. This pedal is great for smoothing the sound or you could use it as a cleen boost and tone shaper.
I've read reviews on the low frequency suck and emailed Diamond, basically for a 4stringer, the present compressor will do great but for a 5/6 stringer, perhaps a wait for the bass compressor will be wiser.
By far the neatest compressor I've tried though I've yet to take on the Demeter.