I got
the BDI21 today.
My initial impression is pretty favorable, though they hurt my feelings by not including a battery!
I popped it apart to take a good look at it and it's definitely a pretty sophisticated circuit, microminiature surface-mount robotic build, as expected --
a lot of effect for $30, especially if you're used to paying more for some stomp with about sixteen components and a circuit the schematic for which you could draw in crayon on the palm of your hand.
The controls worked and were noise-free. As mentioned, the output is not strong (nor is it on the SansAmp), but the noise floor is OK and with a bit of doinking around, you can get some
nice sounds from the unit. For me to say that is very high praise indeed, as at least 95% of the effects I've messed with (and I've messed with hundreds) I find of very low utility, with sounds that do not justify dealing with their nuisance value. This unit I
will use. It does not sound cheap -- most effects do.
I had my new American Series Jazz Bass with 8250 strings and my '54 Precision RI with a fresh set of 9050L flatwounds handy for testing. I plugged them into
an Ampeg B-100R with controls flat and I was impressed by the variety of sounds I could get from both basses.
I'll take it into the studio next week and fool around with it some more with different basses, recording with the DI balanced out and see what's happening with that. So far, it's looks like it's going to be a far more useful piece than I expected!