Question about Harman Kardon AVR 320 Receiver

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Subwoofer can't get my powered sub to work, the sub works the HK doesn't seem to be giving it anything. It worked before but when we unplugged it to move it can't get it to work again. Seems like it took a lot the first time.

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First isolate trouble by giving audio signal to your power sub. by your finger.you know when we put our finger on input signal the noice is amplified and you can listen sound.if nothing is noticed on sub that menas sub has problem.

Posted on Dec 18, 2007

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Posted on Jan 02, 2017

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Hello, welcome to Fixya!

Fault is either from the main system or the sub-woofer itself.

You need to test both unit in order to detect which of the two is giving the fault, so that you can concentrate on the faulty unit.

Test the woofer with a AA battery or any other battery. Put your ears close to the woofer and observe if you will hear any sound. If the woofer makes sound, then it means the woofer is working, but if it doesn't make sound, then it means the woofer is defective. Or you can disconnect one of the working speakers and connect the woofer to that part. If there is no sound, then obviously, the woofer is defective.

If the woofer seem to be working, then the unit needs to be tested also.

Connect one of the working speakers to the sub-woofer's section of the main unit. If the speaker doesn't bring out sound, check the system's menu settings, check the volume and make sure the sub-woofer volume is raised to the highest level and not on mute. ( Note that most Theater systems has separate volumes for each speakers). If the volume is raised to the highest level and there is still not sound from the woofer part, then it means the woofer channel has burnt. It could be a fuse or a defective channel. At this point, I think you need help from a repairman.

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I have a 705 receiver hooked up with HK speakers.


'the best way' is highly subjective.
if you are testing with a 'real' 5.1 or 7.1 source such as a dvd or bd there should be signal getting to the sub, depending on the source content (play a scene with explosions or something). if this is the case and you are not getting signal check all connections. is the sub powered or passive? if powered is it on? maybe try turning down or disconnecting other speakers so you can tell for sure if the sub is making any sound?
if you are using 2 channel playback like a standard cd or an input from an mp3 type player then the sub may not be in use depending on the receiver setup - in order to get 2 channel info to more than 2 channels - 2.1 or 3.1 or 4 or 4.1 or 5.1 etc - the receiver has to do some processing such as "pro logic" to interpolate the 2 channel info to the extra speakers.. you may experiment with these 'enhanced' settings..

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I recomment you ask this question from the expert named ginko. thanks.

give me a fixya rateing anyways thanks :)

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