Thanks for bringing up this subject, Chony.

My main amp is a Peavey KB300 and I'd like some of the aforesaid "thump" added to this. Any advice on which brand and power output of a sub for this unit would be appreciated.

The back of the Peavey has 1/4" jacks for "pwr amp in", "preamp out", (these are both labelled 1.0V 0dBV, plus another one labelled "line out (0.3V -10dBV). Which of these would a sub be connected to? Thanks in advance.