Sony SA-WMSP87 Active Sub -- No sound, but can still turn on/off
I have an active (powered) subwoofer that came with my Sonyhome theater in a box system. I am not sure what the home theatersystem kit model number is any more, but the model number of thesubwoofer is SA-WMSP87. Just this past weekend, the subwoofer stoppedproducing any more sound. When plugged into the electric outlet, I canstill turn on the subwoofer when the power button is pressed. Just nosound comes out. I swapped the RCA from the A/V receiver to thesubwoofer, and still no sound. I also borrowed a similar Sony poweredsubwoofer from a friend and connected this to my A/V receiver to makesure it's not the A/V receiver or the wire.
What could be wrong? Please, any help would be greatly appreciated.
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Depending of the type of Subwoofer that required your system.
A) Amplified Subwoofer. (With 110volts A.C. cord attached to the sub)
The subwoofer electronics circuit needs repair or change.
You will find a compatible subwoofer for this type of subwoofer in audio appliance stores.
B)Not amplified Subwoofer (No 110volts A.C. cord attached to the sub)
Bring your sound system to a technician to have the soldering remaked to the devices bolted on the main heatsink.
And have the Subwoofer checked too.
This type of subwoofer can mostly be buy in kit with the satellites speakers.
And need to match thee impedance of the output of your system.
Search for ( 4 ohm or 6 ohm 8 ohm ) near the Sub outlet behind your system.
make sure the yellow rca cord is plugged into video on both home theater and cable box, if this is not helping, then at the back of the dvd player is a channel button that has a 3 and 4 setting. choose one then turn your tv channel(not your digital box) to that same setting as well
Normally, speaker wires of any length are available from most electronic stores and/or audio/video stores. Even those shops that do car audio installations would have them in their inventory. The only requirement/specification you would need is the power output of your home theater and the required length. The longer the distance, the better the bigger the wires. Speaker wires always come in pairs and have color coding to designate +/-.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.
You didn't say is your sub active or passive.If its active first check signal cables from theater system,power line of the sub, it has to be the same phase as the system.If its passive take a voltmeter disconnect the sub from the system and measure for DC voltage on the SUB output on the system when its OFF.If DC voltage is present your amp is damaged.It can also be that the preamp circuit for the sub doesn't mute the input when unit is on stand by and you hear frequency of your power supply (50-60Hz) on the sub