A lot of these systems have options for switching off speakers and subs. You should look up the speaker settings options of the Sony. If you have the manual see what it says about connecting an active sub.
Testimonial: "I have used the different speaker patterns. Nothing seems to work. "
SOURCE: no sound coming from subwoofer
sometimes these subwoofers are for builtin amplified subwoofers..so if this is the case it will not work
SOURCE: STR-DE475 receiver flashes "PROTECT" when turned on
Protection is usually a sign of overheating or something is wrong at the power amplifier's output.
Theory: Protection is a delay and sometimes an internal test to allow the electronics to stabilize during power up before they are allowed to interact with the speakers. The most common cause of it remaining ON is that a speaker cable pair is shorted. Some isolation is required...
1. Turn the Power OFF.
2. Disconnect each set of the speaker wires that are directly attached to the receiver. Mark them so you remember where each one went. pay special attention to which conductor is on "+" or "POS" and which is on "-", "COM" or "Ground". You may elect to disconnect them one pair at a time if your sytem is complex and you don't want to lose track of where things were.
Turn the Power ON. Is the "Protect" indication gone from the display?
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If YES, you have a shorted speaker wire or speaker. To isolate the specific cause:
1. Turn the Power OFF.
2. Attach ONE speaker wire pair at a time and test it by turning the Receiver ON. When the "Protect" light returns you have isolated at least one of the cause(s). Disconnect the defective speaker cable and continue isolation of all speaker cables. Visually examine the cable at both ends for frayed wires that could touch each other or contact metal on the receiver or other objects.
To isolate further within the cable/speaker pair - disconnect the speaker end of the cable on the failing path. Try another cable that you know works, or at least one that doesn't cause Protection to stay on.
If you're electrically savvy and have a Digital Volt/Ohm Meter you can troubleshoot the short(s) with it.
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If NO, there is probably an internal problem.
Is it solid or does it come on after the Receiver has been ON awhile.
It could be overheating.
Is the unit hot to the touch?
Is there a cooling device (fan)?
Is it stopped or clogged with dust?
Is there adequate ventilation around the unit for air to flow?
Clean any ventilation slots on the top and bottom of the unit.
Avoid stacking components that produce heat under an amplifier or receiver. Their heat rises. Also keep them away from other heat sources like like home heating vents and radiators.
Problem solid and NOT related to the speakers or heat: internal malfunction.
Let me know.
SOURCE: Trying to use a passive subwoofer with STR-DE445
The output of the Sony is "signal only" not power. Being "passive" like your sub. What you need is a sub amp, and they are not cheap, 400-600 on average "min". Unless you have a Velodyne 15 or 18, just get an amplified sub, they start around 150 new. Hope this helps
SOURCE: 5.1 Surround sound not working
Maybe the surround processor is having a bad day... My kenwood would do similar and a reset was necessary to correct. Have you tried resetting the system? On my Sony STR DE 597 this is accomplished by powering off. Then while holding the 2 channel button down (front face plate) power on. A reset message is displayed. Your model may be similar but check your manual or download the PDF of the manual from Sony's support website. Hope this helps
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Also The new sub is a Pioneer SW-8MK2.
I ended up solving my problem by taking the sub out and hooking it up to my old speaker box and rewiring some of the wires for the amp and now it works.
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