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Discussion Starter · #1 ·
Hi, all,


I initially posted this in another site but did not get much response so I am asking for help here.


I have been using the 805 as surround speakers in my HT setup. Recently, when I tried to calibrate the channel volume, I noticed that one of the speaker would play a much lower volume than the other.


If I tried to increase/push that particular speaker by increasing the output gain from my Pre/Pro, then I would hear some kind of crackling/hissing sound at the higher level.


The strange thing is, sometimes, the volume of the speaker would gradually rise up to reference level if I play the pink noise for a while without adjusting the gain from the pre/pro. When this happened, I didn't hear the crackling sound. The fluctuation varies over 10 dB (i.e., not a small difference) between when it doesn't works to when it works.


I have swapped cables from the amp inputs, etc and I am pretty sure it is the one speaker that is problematic.


My question is: Does it sound like it is the Kevlar driver or the electronic (such as internal crossover) that needs replacement?


The oddest part for me was the level would fluctuate over time. Sometimes, once it reaches the normal level, it would stay at that level. I don't have any actual data, but my impression is that if I play that channel at high/reference volume for a while (i.e., when I calibrate), it tends to get better. As a surround channel, the speaker normally would not get that much work, but it feel as if, it needs to "warm-up" by playing at higher volume before it stabilizes.


I guess I have not officially ruled out the speaker cable but that really seems unlike.


I have removed the Kevlar driver and peeked inside the speaker cabinaet. Both the driver and the crossover parts looked OK but then again, I don't know what to look for



I haven't swaps the internals between the L and R speakers because they are mounted high up on the wall and not easily accessible. I am hoping to get some feedback from this forum before I proceed further.


Thanks in advance for reading and your advice.
 

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So when you swapped cables, did the problem stay with the speaker in question or did the same problem occur with the other speaker? You could try connecting your surround speaker wires to the "B" speaker terminals on your receiver and play some music to see how they sound. If the speakers sound OK, the problem may exist in the surround channel on your receiver. If, however, the speakers (or the one in question) still sound problematic, there is probably something wrong with that speaker and you will need to have it looked at.
 

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Quote:
Originally Posted by DogEarz /forum/post/17037865


So when you swapped cables, did the problem stay with the speaker in question or did the same problem occur with the other speaker? You could try connecting your surround speaker wires to the "B" speaker terminals on your receiver and play some music to see how they sound. If the speakers sound OK, the problem may exist in the surround channel on your receiver. If, however, the speakers (or the one in question) still sound problematic, there is probably something wrong with that speaker and you will need to have it looked at.

If you have not excluded the speaker cable from the check list of potential culprits, that is what I would do next, as suggested above. Any spare speaker wire around that you could run from speaker to amp just for testing?


I am not a B&W speaker repair man, but is it possible to unhook the internal speaker wire and reconnect? Not sure about the internals on a 805 if there is soldering. Just make sure any wires you unhook you right down the colors and placement. Dont want to get them crossed when plugging back in.


If still having issue after that, you should bring it into the dealer you bought it from.
 

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Discussion Starter · #4 ·

Quote:
Originally Posted by DogEarz /forum/post/17037865


So when you swapped cables, did the problem stay with the speaker in question or did the same problem occur with the other speaker? You could try connecting your surround speaker wires to the "B" speaker terminals on your receiver and play some music to see how they sound. If the speakers sound OK, the problem may exist in the surround channel on your receiver. If, however, the speakers (or the one in question) still sound problematic, there is probably something wrong with that speaker and you will need to have it looked at.

Thanks for getting back to me. Sorry I didn't make it clear enough. When I swapped speaker cable from the outputs of the amp to the speakers (i.e., Right Surround Out switched to Left Surround Out) so that the left channel test track is feeding the right speaker, the problem stayed with the one (Right) speaker. So the problem is either the right channel speaker cable or the right channel speaker.
 
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