bass preamp

My bass player just fried two channels on my board. He used a preamp compression pedal, into a passive DI box into an XLR channel. My formerly beautiful board smoked. It was clipping. We changed channels, DI box, cables and the second channel started to smell too. I disconnected the bass player and ran him thru my Roland keyboard amp. Please help me understand what happened!

The VTBP-201S or HBP-1.

I need some pros and cons. Also, anybody know what may have preceded these units at Demeter?

A chap has got one and says it's 4 -5 yrs old and all he can remember is it's got BP in the model number.

What's the consensus in general?

Ciao,

Woods