I can't get the external sub woofer to work. I know it worke with other inputs, but can't get it out of the subwoofer outputs on the Yamaha XV661.

SOURCE: sr7200 LFE (sub woofer) output stopped working

Chances are if The Receiver only has sound in Stereo Direct Mode and all surround modes and Sub out are Inop the DSP (Digital Signal Processing) Card is most likey defective. These boards are not available from marantz (D&M Holdings) and must be Component level repaired which usually is not cheap. If Only the Sub out is not working check setup to be sure sub woofer is set for on. Also If On Screen setup menu does not appear on video monitor Unit may need to be Reset manually which entails discharging a Capaitor on main P.C.B Contact [email protected] for details

SOURCE: Sub Woofer Won't Work

mbruno did this work? I have the same issue

SOURCE: Yamaha RX-V1200 subwoofer connection to Mirage BPS-150i subwoofer

just connect your subwoofer mono RCA to your amp sub single out rca connector. you do not need to megre all those 4terminals into one. in fact internal circuit of those 4rca are merging inside to one since the sub uses only a single amp. 4inputs was meant for sources with multiple sub out

SOURCE: sony subwoofer model# sp-pwm505

I have a JVC sub woofer SP-pwm 505 can I use this with any system my receiver has RCA jacks it looks like this uses a S cable...is there a cable that would convert "S" cable from sub woofer to an RCA output jack in receiver [email protected]

SOURCE: Sub-woofer output not working

"Sub-woofer output not working" problem, and notify you when a new solution is offered.
Press the setup key on the front of the receiver
Select the subw setting
Move the multicontrol knob until the sub woofer is on
Turn off the receiver and turn back on- the subwoofer should be on

The operator manual can be downloaded on the web site--- free

http://www.retrevo.com/support/Kenwood-VR-507-Receivers-manual/id/480ag219/t/2/