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Receiver Pre Out confusion...

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Old 05-14-2016, 06:25 PM   #1  
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Default Receiver Pre Out confusion...

So I have a Yamaha Yst-sw216bl subwoofer and a Yamaha RX-V375 receiver. When I plugged in my sub with a subwoofer cable to the Pre-out jack in my receiver, I heard an annoying humming sound. I checked the instructions and I saw this:

"When you connect the subwoofer to the PRE OUT terminals of the amplifier, make sure that the amplifier has at least two sets of PRE OUT terminals. If the amplifier has only one set of PRE OUT terminals, do not connect the subwoofer to the PRE OUT terminals. Instead, connect the subwoofer to the speaker output terminals of the amplifier"

That's when I realized that my receiver only has on set of the Pre out jack.. So I hooked up my sub the way the instructions say, but I feel like my subwoofer is being underutilized since I have it hooked up to my front speakers instead of having it's own cable and me being able to play with the levels from the sub. The only way to play with the levels is by adjusting the levels of my front speakers, and I don't want that since it's going to unbalance my surround sound... Are the directions right? it just seems weird that I can't hook up my sub directly to my receiver through the pre out jack just because my receiver only has one set? it makes no sense! Like I said before, the first time I hooked it up I did it that way, but I got an annoying hum coming from my sub... sad face lol help!

More info: My sub has a left and right input for rca cables. The left is the mono one. It also has connections for speaker wires for connecting it to two speakers. The top row says "from speakers" and the bottom set says "to receiver". (My receiver does not have speaker wire connections for just a sub, it only has connections for the speakers for the surround system).
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Old 05-14-2016, 07:55 PM   #2  
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Use on of these on your receiver and connect it to a pair of rca cables for your sub
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Old 05-15-2016, 04:34 PM   #3  
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Thank you sir!
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Old 05-15-2016, 06:03 PM   #4  
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Your welcome - if you still hear a hum using that it is probably a ground loop issue.
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