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check the cable for you sub woofer. If problem exists. Try another cable to verify. What kind of subwoofers are you using? Are you going through the LFE port or are you running speaker wires through the speaker inputs on the sub?
Black would be minus - and red would be plus + but this will only work if your receiver actullay has a + and - binding post specifically for the sub woofer. Sometimes you will have wiring binding posts and other times you will have a rca phon plug and maybe your sub has that as well
Yes, go to your menu then setup then speakers then subwoofer, it's probably in "LFE" it should give you the option of Sub, LFE, or Both. that should do the trick. Also check the crossover point and season to taste. While your at it; there should also be a setting for speaker level, toggle down to sub and adjust the sub out level, it's probably at it's minimum setting. Hope this helps
Hello, The subwoofer is totally independent from your Pioneer VSX-D412. You can check if it works like you did with a finger on the hot point of the RCA cable (not very good test, as you will hear noise and can't say if that means it works OK) or better connect a known receiver to the speaker connections in the sub and test to see if it’s working properly. Regarding the receiver, you may not have enabled the VSX to output to the sub. Read the manual on how to check for that. Only Dolby Digital 5.1 signals will allow the sub out, in a receiver of this level. It normally will not let you use the sub in stereo mode. Some more complex units will allow you that, but I believe not this model. Good luck
Based upon your description, the subwoofer is just a speaker and is taken from the normal speaker outputs. Run your A channel to the sub and then from the sub to the left and right front speakers. That should do it.