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The receiver's out put sections are grouped in pairs. Front left and right in one output, rear left and right in second output, and center channel and sub output on the third. Sounds like a semiconductor or semiconductors have gone bad in the center & sub output.
That subwoofer is included in the MHC-GX450 system. I have the amp/CD/radio unit. but not the subwoofer. The control cable connects the LED on the Sub to the main unit. When the main unit detects this connection to the LED it switches on its internal subwoofer amp to drive the subwoofer.
Does the JVC receiver use a "control" circuit through its external subwoofer unit to signal that it is connected to the subwoofer? If not, you do not need to use the control jack on the SS-WG450 to connect to the JVC receiver. Connecting the Sony subwoofer to a subwoofer output on the JVC unit may be enough. Do check the impedance required by your JVC receiver. Sony lists the SS-WG450 as having a Nominal impedance of 6 Ohms. Is this high enough for the JVC unit?
That would require you to disassemble the subwoofer cabinet and disconnect the the supplied amplifier. Connecting this unit to a different amplifier would provide no benefit to you unless the on-board amplifier became damaged.
did you hook up the power antenna or amp. turn On wire? make sure you should ha a wire that is to power an antenna and this is the wire that has 12 volts as soon you turn On your stereo and send 12 volts to your amp. but if you don't connect this wire, the amp will never turns On
try to be a little more clear on what you are trying to do.do you have it connected to hdtv and cable box if so run hdmi cable from cable box to tv and then run optical cable from reciever to cable box you then must turn reciever to cd/dvd to listen to it leave reciever in auto mode go into cable box menu under audio and select dolby digital
you will need a line-level converter to use this subwoofer- it is a rectangular-shaped box with wires coming out on one end and red-and-white RCA plugs one the other. The end with the wires coming out will hook to the receiver, and the other end will need to plug into the sub.
Even if your JVC doesn't have outputs for a subwoofer you can hook it up with the a speaker wire to RCA converter.
You just spice your rear speaker wires to this device then connect RCA's to your amp.
I've used them before... works great.
http://cgi.ebay.com/ebaymotors/Speaker-to-RCA-Line-Level-Converter-Adjustable-High-Low_W0QQitemZ130143832174QQihZ003QQcategoryZ38636QQcmdZViewItem
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