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My 909 sub has stopped working :( the light turns green but no sound. I have connected a second sub to the cabling and this works fine.

Mordaunt-Short MS909W

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There could be an open fuse internally or possibly power supply failure.

Posted on Nov 29, 2014

Testimonial: "Hi and thanks for replying Tom. I have checked all the fuses I could find and they are fine and the power seems to be getting to where it's supposed to. I did contact the makers but they didn't bother to reply, it's a shame because I love this sub :("

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SOURCE: my mordaunt-short avant 908i front left speaker

I had similar problems my tweeter was blowen and it had to be replaced... I actually blew the speaker many times using a NAD amp as there were spikes coming from the amp. I changed the amp to a Marantz PM7200 and have had no problems since.

Posted on Dec 09, 2009

Beelz
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SOURCE: PSB 5i sub does not work when connected to

try using different wires

Posted on Jul 13, 2010

  • 232 Answers

SOURCE: 309i sub not working

hi ,
2 things to do

1 - the power amp has fail and will need to be looked at
2- your amp could have a sub output faillure

Posted on Jul 15, 2010

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1 Answer

No sound from sub


  1. Are the stereo speaker wires run to the subwoofer and out to the stereo speakers
  2. Make sure the notch filter is off
  3. Refer to the manual on line: http://www.manualslib.com/manual/105794/Mordaunt-Short-Ms909w.html?page=7#manual
  4. READ THE MANUAL

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1 Answer

309i sub not working


hi ,
2 things to do

1 - the power amp has fail and will need to be looked at
2- your amp could have a sub output faillure

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1 Answer

My mordaunt-short avant 908i front left speaker aluminum tweeter stopped working... no sound coming out, however two midrange speakers functioning just fine.


I had similar problems my tweeter was blowen and it had to be replaced... I actually blew the speaker many times using a NAD amp as there were spikes coming from the amp. I changed the amp to a Marantz PM7200 and have had no problems since.

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1 Answer

Alpine type-r 2ohm dual voice coil help


try reconnecting your rca's from the deck to the amp when finished wire one speaker positive to positive on left channel and negative to negative on right channel then connect the 1st subwoofer. if all power and sound is fine and working turn off power to amp and connect negative terminal of 1st sub to positive on 2nd sub and positive from first sub to negative on second crossing the wires runs the speakers in series another way to try is parralel the speakers wiring by connecting positive left channel output of amp to positive on 1st sub same with the negative then splice positive to positive on second sub and same with negative.

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Amp Turns on Fine, but no Sound


have you checked the levels on the ohms? adjust them higher if need be contact me on yahoo msgr if you need more assistance

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1 Answer

My Sub has stopped working the LED light does turn green but no output comes out of the sub...... any ideas ?


Check that the connection to both the amp and sub are in place and that the wire is not comprimised. Otherwise, have you changed the settings on your amp lately? It could simply be a matter of adjusting settings. If in doubt, start from the start and treat it as a piece of new equipment - set it up from the beginning and follow all steps from the manual.

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it is probably the rca inputs on the amp may have fried. was your cd decked turned up loudly before the power went out? did any wires accidently touch each other? If had worked fine and then suddenly stopped, than either a wire came loose or the inputs fried. try using different cables and I also suggest disconnecting power for 24 hours and then reconnect. If the green light is on then it is getting power and the problem is in the rca cables or the inputs

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Only tinny sound coming from the speaker MS904


The "tiny sound" may be a blown woofer you are only getting sound from your high section.

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1 Answer

Subwoofer not powering up


I could either be the sub or the main unit. The main unit actually sends a signal to the sub to turn it on so if that circuit is bad in the main unit the sub is never going to come on. I've also seen bad cables (You'd be amazed at how stubborn people can be when din connectors don't cooperate).

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