Question about Infinity PS-10 Subwoofer

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Inifinity Entra Sub not working

I have an Infinity Entra Sub for my home theatre system. Well a few (about 5) years back probably about 7 months after I bought it, from CIRCUIT CITY, it stopped working just had a loud annoying hum. so i took it back to get it fixed I bought a 1 year warranty for the sub and polk audio surround sound speakers and they tell me that I only bought the extended warranty on the surround speakers not the sub and they told me I would have to send it back to INFINITY to get it fixed but I wasn't going to pay the shipping to get it fixed. So it's just been sitting here unplugged and I figured I would tear it apart to see what the problem is. Well I hooked it up today and had the HUM so I unplugged the speaker on the inside and checked to make sure the speaker works and it works fine so the problem must be inside the amp, well when I hooked the speaker bac up there was no more hum, but it still won't produce any sound.

Anyone know what my problem could be?

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The hum can be from the power supply not properly filtering, and or the output stage also has a short.

There is the chance that the speaker driver coil is now burned, or the power supply is now dead. If ther output stage is shorted and was putting DC on to the speaker cone, this will burn it very easily.

You should sent the unit out and have it serviced, unless you are properly trained, have the service and engineering manuals, and the test equipment to follow up on a proper repair and calibration.

Jerry G.

Posted on Apr 28, 2008

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How do i fix my infinity entra 10 inch 150 watt powered subwoofer. fuse is good, green led is on so it is getting power


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If you have everything correct, are you the original owner? It's an older model so if you are the original owner what happened when it stopped working? Noises, fade out, just wouldn't turn on one day.

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You could poke around her for the Entra Manual for YOUR model.

http://manuals.harman.com/INF/Hom/Owner's%20Manual/

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