Question about Yamaha YST-SW215 Subwoofer

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Fixing my subwoofer

I have'nt used my sub for a few weeks and now when i try to use it the power comes on but no sound comes out. ive checked to see if the cable connection was good and nothing changed. i also took it apart to take a look inside to check if anything might have been fried i didnt notice anything, but i also dont know anything about subwoofers so i hope u can help me out here.

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  • S-AVILA Jul 13, 2008

    SAME HERE THE GREEN LIGHT GOES ON BUT NO SOUND.. THEN AFTER HALF HOUR THE GREEN LIGHT TURNS RED...

  • mrose5019 Dec 20, 2008

    I have the same problem since i moved. And my reciever (RX-v750) wont even show it on the face or work in test mode. I hope someone know how to fix this. Yamaha has yet to respond to my emails.

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  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: Yamaha nx sw300

Ditto, i've got all 5 speakers without the Subwoofer. The subwoofer hasn't worked from day one, but I delayed replacing the unit for too long and don't have the warranty, I looked at all soldered connections and none of them have come un-soldered and all connectors are properly connected, can't think of anything but broken component that would cause it from here, nor can I think of a quick fix

Posted on Jul 04, 2008

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  • 1 Answer

SOURCE: YST SW005 Subwoofer

Just buy a new one, and it didnt cost me a premium plan to find out. I thought you guys were here to help and not take someones money and then say theres nothing you can do. I am movin on boys. It doesnt take an expert to figure this one out. I just thought you guys would have maybe a better idea. Buh bye.

Posted on Aug 12, 2008

  • 1 Answer

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?

Posted on Aug 07, 2010

  • 1 Answer

SOURCE: I have a Yamaha sub woofer model NX-SW150 that was

Where does the 1/8 3.5mm mono jack get plugged into on the receiver? The RCA subwoofer output is already taken.

Posted on Dec 15, 2012

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  • Although most of my background is in car audio & acoustics, I did have a thought or two about some tests you can do.

DO THIS AT YOUR OWN RISK OF ELECTROCUTION - Have you tried checking the speaker terminals with a voltmeter while the unit is plugged in? I,ve seen solid state amps (both car & home amps do this) kind of lock up and send constant line voltage to the sub. In some cases the sub snaps instantly, high power subs may not. I've used power from a 110v wall outlet to show off some high SPL systems I've built (very painful 60hz earthquakes). So be careful at the sub terminal it may have some voltage at it.-(If it does you probably know the rest of my answer.)- If so the sub will most likely be wasted and fused voice coils are also common when this happens.
If everything checks out okay there (make sure to check if the subs resistance is at spec while you're there) use the voltmeter and start poking around the audio side of things both on the powered sub and RCA's. You may even find a easy problem on RCA cables. Also can/did you plug the RCA's into a known source, to check their output. Most home audio is 1.5v max but some can go as high as 8v max or so. Also don't be afraid to check the simplest of items like source buttons, specifically the tape monitor buttons. My equipment has these such tape functions with little or no indication as to weather or not they are active, and not being plugged into anything you get no sound. I hope I gave some idea's you may not have tried, your fellow Audiophile-
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Does the sub hum without anything plugged into it except for power? If it makes a real loud hum almost a squeal then I think the rca cable between the receiver and the sub is dead shorted and needs to be replaced. If it's more of a low level hum, then it's a ground hum caused by many things, ie........the receiver and the sub being on different power circuits in the house.......sometimes diconnecting the cable tv feed as it enters the room while the sub is connected and humming to see if it stops........the easy fix sometimes is using a 3 to 2 prong ac adapter but lifting the ground on such a powerful amp could be a fire hazard.

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I believe you should take time and check your connection.
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1. It may be connected to another power source ( amplified or powered supply ) or incorrectly connected. It may also be too close to said power supply.Try letting the dog (sub) out on his leash a little Drag out the manual that came with the sub, and check the correct procedure for your type of setup.
**People do read manuals still don't they ?**

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3. However, if you're considering placing this subwoofer in a cabinet, I'd recommend allowing ample breathing room for the heat sink. This can also be done by drilling smaller holes in the cabinet ( 8-12 mm holes - with the owners permission of course) but please do remember to keep the port area clean.

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Velodyne has been making subs forever and do it well.


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