Last week I picked up a Diamond Compressor CPR-1 as the bass version BCP-1 was not in stock and I also play 6 string guitar. I use it mainly with my passive Jazz Bass and it's a delight. I decided to add this post for those, like myself, who are unsure if they need to get the bass version.
It's true what Bongo says.. this thing is absolutely silent (which is more than I can say for the JB!). No swelling noise floor after each note.
Before using this pedal I didn't really understand what "transparency" really meant but this pedal compresses with little of the "clamp down" effect evident in most other compressors I have tried. If you are looking for that effect then you may need a pedal with a higher compression ratio.
I like the "Tilt" EQ feature, it gives what is described as a 'musical' equalisation to the tone, but I have a feeling it will remain in the mid detent position.
Build quality is great and it looks robust. I power it with a 12v adapter but according to the manual it will accept up to 24v. I'm unsure if a higher voltage is a benefit with the CPR-1 but I understand that the BCP-1 gains more headroom with higher voltage supply.
The BCP-1 EQ caters for a low B string on a fiver but as I struggle with just 4 strings that isn't important to me.
I can highly recommend this pedal.
btw, the Diamond Bass Comp is the best sounding pedal bass compressor I've used.
