J & M audio problems w/ FM reception
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Cruiser
Joined: Aug 2013
Posts: 160
Likes: 3
From: Colorado
J & M audio problems w/ FM reception
Bought the "D" series amp 180w w/ 7" speakers kit for 13 SG. Install was simple and easy. Have the pos and neg properly connected / grounded. FM reception is horrible and worse when bike is running. I have the hidden hd ant under the fairing, not sure that has anything to do with it, but when I bypass the amp from hu direct to speakers, it's fine. Amp still on.
JM says they never heard of such a problem and they want me to send amp to them.
I'm not exactly satisfied with the sound quality from cd or mp3 either.
Anyone ever experience this?
JM says they never heard of such a problem and they want me to send amp to them.
I'm not exactly satisfied with the sound quality from cd or mp3 either.
Anyone ever experience this?
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Joined: Apr 2007
Posts: 2,580
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From: Tucson AZ
afacey ,,,,,,,,
any way that you can plug back in your rear FM antenna momentarily so that you can determine if the in-fairing antenna you have is the problem ? ,,,,,,
then if it is, I suggest using this one http://www.jmcorp.com/ProductDetail....tID=FPA-HCFM-P ,,,,,,,,
J&M Performance series class-D amplifiers DO NOT interfere with FM radio reception ,,,, neither do our class G amplifiers ,,,,
any way that you can plug back in your rear FM antenna momentarily so that you can determine if the in-fairing antenna you have is the problem ? ,,,,,,
then if it is, I suggest using this one http://www.jmcorp.com/ProductDetail....tID=FPA-HCFM-P ,,,,,,,,
J&M Performance series class-D amplifiers DO NOT interfere with FM radio reception ,,,, neither do our class G amplifiers ,,,,
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JMJOHN,,,, www.Jmcorp.com ,,,, send email direct to John@Jmcorp.com for your HD-Forums VIP Discount Promo Code.
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Thread Starter
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Cruiser
Joined: Aug 2013
Posts: 160
Likes: 3
From: Colorado
John, I don't have the org ant, only the cable that is run to the rear, and of course that is worse. So not sure what to do here. I just bought the system last week and in all honesty even if the FM reception was fine, I was looking for a bit better sound quality, not just cleaner at volume. Your rokker system sounds like it would be more in line with my expectations. If I'm stuck with it, so be it --we'll need to fix the FM reception.
What should I do?
What should I do?
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Joined: Apr 2007
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From: Tucson AZ
afacey ,,,,,,,
If you want to trade in what you just purchased and installed for the higher powered ROKKER XX system, we can do that for you ,,,,,,
who did you actually purchase the original system from ? ,,,,,,
do you anticipate adding any more speakers to the bike in the near future ?
If you want to trade in what you just purchased and installed for the higher powered ROKKER XX system, we can do that for you ,,,,,,
who did you actually purchase the original system from ? ,,,,,,
do you anticipate adding any more speakers to the bike in the near future ?
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Cruiser
Joined: Aug 2013
Posts: 160
Likes: 3
From: Colorado
Ok, I'll do it. I'm in Colorado, when can we get it going? I did install, extremely simple, that's why I'm stumped on the FM reception issue.
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Joined: Nov 2007
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From: East of the Sun, West of the Moon
Class D is class D. I don't care the manufacturer. From J&M, to Biketronics, Soundstream, ARC Audio, JL Audio, Rockford Fosgate, and so on. The design of the power supply circuits for these amps is the same (that in addition to the transistors used in the outputs circuits is what makes them Class D) with different parts per manufacturer but the problem still exists. And to further that, it's hit or miss. Some it works fine, some it barely interferes, some it takes out FM altogether. There seems to be no rhyme or reason to it, at least not that I have been able to figure out with varying setups and equipment.
Last edited by UltraNutZ; May 24, 2014 at 07:15 PM.
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Joined: Apr 2007
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From: Tucson AZ
U/N,,,,,
I disagree ,,,, the J&M Class D amps have NEVER caused FM radio reception problems and I have installed and tested a lot of them ,,,,,,,,
afacey has some type of antenna issue, could be a plug issue on the case of the Harley radio, could be something else ,,,,,,,,
when he and I find it ,,,,, you will be the first person we tell !??! LOL ,,,,,,
I disagree ,,,, the J&M Class D amps have NEVER caused FM radio reception problems and I have installed and tested a lot of them ,,,,,,,,
afacey has some type of antenna issue, could be a plug issue on the case of the Harley radio, could be something else ,,,,,,,,
when he and I find it ,,,,, you will be the first person we tell !??! LOL ,,,,,,