(Do you hear anything when you engage the 950's sub test tone?)

No. The left and right give a sound but no sub. I already unhooked the center and rears, so I'm not sure if they give a sound, but they did play just no base.
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HT:
Sony KF-60XBR800 monitor
Outlaw 755 (200x5 surround channels)
Cinenova Grande (300x3 front L/R channels)
JBL S412PII Front
JBL S38II Side
JBL S26II Rear
JBL S Center
Sony SAT TiVo
Samsung SIR-T5360 SAT HDTV Reciever
Pioneer DV-563A