Question about Jmlab SW700BK Speaker

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SW700 does not start automaticly

I have a SW700 connected to an ampli Yamaha RX-V2400 and the sub does not start by itself when I switch off and on and when I change the frequency setting with the rotary knob on the back, the LED stays Red on the back.
When I unplug and plug the input (with the switch to ON), the sub starts working. I have been seeing this problem since I got this ampli (3 years ago). I had before an ampli Pioneer VSX-901S and I never had this problem.

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  • Herve Pencalet Apr 04, 2008

    I forgot to say that I tried it on a Denon AVR-2106 and it is working fine, I also connected a sub Enregy S10 on my ampli Yamaha with no issue.... Yamaha .... JMLab sub = incompatibility ?

  • Anonymous Aug 31, 2008

    Just get a hum, a pretty heavy and loud buzz type hum., No sound output.


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It sounds like the audio sense circuit is either disabled or defective. This circuit has few components and should be easy to repair by any service shop. Expect a parts cost in the $10-$20 range at most. Include the local labor rate for the total repair cost.

Posted on Apr 04, 2008

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