Whirring Noise From Speakers...
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Seasoned HDF Member
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From: Ottawa, Ontario
Whirring Noise From Speakers...
Picked up a B52 amp from a Forum member, works fine, no problems with FM reception. Weird thing is there is a whirring noise coming from both speakers when the head unit (JVC KD-R97MBS) is turned off and bike is running. It's not very loud and increases in volume with the revs but still not that loud. It's not present when HU is turned on. It's obviously interference from either the ignition or charging system. New amp is mounted same setup as old amp. I have RF chokes on my main power and ground cables. Found it a bit strange. My solution is to just leave the HU turned on and switched to a source not in use, aux or bluetooth for example.
Jim
Jim
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From: Nevada
haze is right. Start by checking your grounds. Using a test wire, try grounding the amp at a different location. Check ground at the head unit too. If all else fails, some have used a ground loop isolator to eliminate noise.
Last edited by Geoff; Sep 12, 2018 at 03:48 PM.
Grand HDF Member
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From: florida
not all amps are created equal, the new one might like a ground from a different spot, i've seen it before. also check on where your remote turn on source is, you might try different options there also.
m
m
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From: Ottawa, Ontario
Originally Posted by marcodarq
not all amps are created equal, the new one might like a ground from a different spot, i've seen it before. also check on where your remote turn on source is, you might try different options there also.
m
m
Jim
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From: TEXAS
Originally Posted by marcodarq
not all amps are created equal, the new one might like a ground from a different spot, i've seen it before.
m
m
T
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Seasoned HDF Member
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From: Ottawa, Ontario
Problem kind of resolved itself. Had my gain for the new amp set with a DMM at 3/4 volume (27 of 35) , went for my first ride, didn't realize until I got back that I had blown a speaker. Had the volume at 30.
Put my Polks back in, no noise. That's the third set in 3 years I blow by listening above 3/4 volume, WTF. If the volume you set the gain at is my theoretical max, then maybe I should set it at a higher volume so I don't overdrive the speakers.
Put my Polks back in, no noise. That's the third set in 3 years I blow by listening above 3/4 volume, WTF. If the volume you set the gain at is my theoretical max, then maybe I should set it at a higher volume so I don't overdrive the speakers.
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From: florida
T,
Not all amps draw the same amount of power in the same way, different internal power conversion and such, also will create different ground requirements. Not so much a big deal on the sled, but still true. We all know that the ground at the battery is the best, but sometimes loose, dirty or generally poor ground connection causes all kinds of negatives. On my bike, the remote turn on from the amp, when hooked up at the cig lighter power source, made some weird poppings, when connected to the LC2I remote hook up, noises stoppped.
The main thing that i was trying to say is that all amps do not have the same interals for processing power and ground supplies. Different brands might use different parts and different ways of making things happen, after all if they werent different, they'd all sound great and we'd all be happy.
m
Not all amps draw the same amount of power in the same way, different internal power conversion and such, also will create different ground requirements. Not so much a big deal on the sled, but still true. We all know that the ground at the battery is the best, but sometimes loose, dirty or generally poor ground connection causes all kinds of negatives. On my bike, the remote turn on from the amp, when hooked up at the cig lighter power source, made some weird poppings, when connected to the LC2I remote hook up, noises stoppped.
The main thing that i was trying to say is that all amps do not have the same interals for processing power and ground supplies. Different brands might use different parts and different ways of making things happen, after all if they werent different, they'd all sound great and we'd all be happy.
m