I have a Pioneer VSX-456 receiver with Yamaha's 6 speaker 5.1 home theater system. I can hear a low level hum from the sub when it warms up. I have tried several rca cords. Nogo. I can lightly tap on back of receiver, just under the rear speaker input and the sound goes away for minute or two, but does come back. One other bit of info is that i have multiple pieces of both computer and stereo equipment all plugged into surge protectors on same outlet. The surge protectors are plugged into wall sockets that I have had to add grey step down grounds. The house I live in is old and all outlets still have two prong connections. I have tried different set ups dealing with the plug issues. same noise occurs.
You could try cleaning both the female ports you are connecting to along with the cables ends you are interting with DeOxit. Sometimes they both develop oxidation over time. Good luck! http://store.caig.com/s.nl/sc.2/category.188/.f
SOURCE: my computer sound system
Most likely the sub has the crossover in it, most likely the 2 input cables from whatever device you want to play through the system will plug into the sub then the 2 speaker cables will come out of the sub and go to the speakers, just be sure to have everything connected into and out of the sub and make sure the power cords for the speakers and sub are plugged in, I am assuming this is a self powered system wich means the amplifiers are built into the speakers and sub.
SOURCE: My home theater speakers make a constant hum
jd40,
Sounds like a grounding issue. The first two places to look into is the powered subwoofer and antenna. During your last test, did you leave the FM antenna and subwoofer connected? Many times the hum is directly related to the antenna and/or the subwoofer and to how they are grounded; creating a ground loop through the receivers ground on the outlet. If the antenna is grounded to the dwellings wiring, hum is inevitable and sometime you can get a ground loop hum from how or how & where the subwoofer is grounded. Try taking them completely out of the loop.
Also try taking it further back to the basics, start with the receiver plugged into a known good grounded outlet with no surge or line conditioner in the loop and nothing connected to the receiver, nothing. Use one speaker and different wire to test each speaker output while in tuner and any other mode but phono. With no signal, you will either get nothing (no hum or static) or just static in the tuner mode. No hum is a good sign. Some systems will mute the speakers if no signal is connected to eliminate the static from being produced through the speakers but a ground loop hum will most likely still be produced even in mute. If you get a hum when nothing is connected to the receiver, try looking into getting a better grounded outlet, even maybe to a different dwelling.
-Chris
SOURCE: I have a Yamaha sub woofer model NX-SW150 that was
i am wanting to know the answer to the exact same question. did you ever find the answer?
SOURCE: Just purchased the Yamaha RX-V765 receiver. Have
I too have purchased the same receiver and have the same speakers. Did you get a good solution to this problem and how does it sound?
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