Question about Dynamo MartinLogan Subwoofer Speaker

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How to remove the back plate of the Martin Logan Dynamo subwoofer ? I need to send in the back plate for repair.

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Posted on Jan 02, 2017

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SOURCE: Bought a used Martin Logan Dynamo subwoofer a

Neither the amp or the sub have grounded power cords.

I have discovered the ML Dynamo takes about 30 minutes to switch to standby in auto mode.

With speaker level inputs connected to the Onkyo A807 amp, both units powered from the same wall outlet, Dynamo sub on Auto, the sub hums for about half an hour after the Onkyo is switched off, then the sub goes quiet. Not so good.

I connected a bonding wire between the two units on 3_7_09. If I smoked some old audio gear I could just look at that as an opportunity, right?

Works fine. Now I have the ML powered from the wall and working normally.

Posted on Jul 03, 2009

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SOURCE: I own a used Martin

Did you get the sub fixed? I know someone with the same problem - won't turn on, fuse is fine. May be due to different underlying problem, but wondered if you discovered what it was and if you got it fixed.
Mike

Posted on Oct 29, 2010

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If you look in the back of the sub woofer you will notice a metal back plate with all the sockets and controls on it. You will notic a lot of screws on it, now remember only to remove all the screws close to the edge of the metal plate ( do not remove any of the screws in the middle portion ) about 8 to 12 screws. After removing the screws pull out the metal plate gently. There will be some cables attached to the plate , do not attempt to remove this !!. Shine a torch into the box and see if you can retrieve the toys from the gap you have created by parting the back plate.
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I own a used Martin Logan Dynamo (older series) and just today found out there is no sound coming out/no led light (at the back) either. I opened up the back and saw the 110V power is getting in but no...


Did you get the sub fixed? I know someone with the same problem - won't turn on, fuse is fine. May be due to different underlying problem, but wondered if you discovered what it was and if you got it fixed.
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Bought a used Martin Logan Dynamo subwoofer a couple days ago and have a very loud hum when the ac cord is plugged in, even if the speaker is not connected to an audio source. The "hum" can be heard in any...


Neither the amp or the sub have grounded power cords.

I have discovered the ML Dynamo takes about 30 minutes to switch to standby in auto mode.

With speaker level inputs connected to the Onkyo A807 amp, both units powered from the same wall outlet, Dynamo sub on Auto, the sub hums for about half an hour after the Onkyo is switched off, then the sub goes quiet. Not so good.

I connected a bonding wire between the two units on 3_7_09. If I smoked some old audio gear I could just look at that as an opportunity, right?

Works fine. Now I have the ML powered from the wall and working normally.

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