Audio Pro Sub B1.35 Features

Home Theater with Black Diamond,
Black Vector and B1.35
USA: Stereofile - a guide to home theater, 2001
Conclusion
"The integration of Audio Pro's six Black Diamonds, one Black Vector
and B1.35 subwoofer was seamless. ... The continuity of tone, transients
and space was fantastic. ... Revealing clarity, articulated enunciation, call
it what you want - there's good reason these speakers gather awards in
the European press."