I use a BPS, then I replace it with a pair of speakers more powerful amplifier (Yamaha MSR 400) with a small table. For a rock band, even in the BPS, the power is insufficient. We have to put this silent little background sound for a password (vocals). So it's not good for the hardware, and not out in concert.

I do not return to the design, well thought trs. The effects seem to me a lot, but I did try once. Good product, but only for low volume playing: acoustic group without a battery for example.