Question about Dahlquist QX-4A Main / Stereo Speaker

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Dahlquist PDQ 1200 subwoofer

I had an electronics guy hook up a new receiver and then say my subwofer fuse was blown replace it with a "larger" fuse. The unit began smoking and had just a humm. The transformer was very hot. I need to know if this is salvageable and where I can get a new transformer if so.

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  • wmac500 Feb 23, 2009

    Just came back from vacation, plugged it in an got a loud hum. Replaced the fuse twice, same thing.

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3 Suggested Answers

jerryg50
  • 1635 Answers

SOURCE: Velodyne subwoofer

First make sure that the cables are properly connected up. Make sure that the output of the amplifier feeding the sub is working properly and has no faults.

If the above is okay, it is possible that the power supply in the sub, and or the output stage has a failure. In this case the sub will require shop service to have it working again.

Jerry G.

Posted on Jul 03, 2008

  • 1 Answer

SOURCE: Blew fuse on Dalquist PDQ-1200

My sub shows this a a 240v / 1amp slo blo fuse

Posted on Apr 30, 2009

  • 2 Answers

SOURCE: blown fuse on sub woofer

1 amp 250-volt from radio shack #270-1021

Posted on Jul 24, 2009

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1 Answer

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1 amp 250-volt from radio shack #270-1021

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I have a set of phased array dq-10's from the 70's. TO pull the woofers you need to remove the grill, four screws, 2 on each side, and the four screws holding the woofer in place will be exposed. Inside you will see a green and a white wire. It is harder but easier in the long run to un-solder these leads as opposed to snipping them, good luck.

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