Very good Audio Pro B2-50 sub. Great reviews on line. Very nice condition, with minor marks. Oiled walnut, with black grill cloth. Finished on all 5 sides. Amp has been completely gone through, caps replaced. The two 6.5" woofers have rubber surrounds, so no foam rot to deal with. Performance is superb, flat to 20 cycles, with cut off below that point. Fast and detailed, works great with electrostatic and horn speakers. High and low level inputs, outputs, variable level, and crossover points for sub and signal going to main speakers or power amp.
Do a Google search for more information. Includes Audio Pro cables for hookup to amp or preamp outputs.
This is the second of two I have.
Pics to come.