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FM loss with Class D amp

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Old

Dec 7, 2014 | 01:27 PM

#1

Cheesehead_13

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From: Phoenix, AZ

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FM loss with Class D amp

Is the FM reception loss with Class D amps limited to the HK stock head unit? Meaning... if I replace the head unit with an aftermarket will I get FM reception back?

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Old

Dec 7, 2014 | 01:43 PM

#2

floridapoolboy

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I ran a class D 4 channel Precision Power amp with a Sony HU and didn't lose any FM.

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Old

Dec 7, 2014 | 03:02 PM

#3

haze324

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From: S. FL

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I lost “some” with Sony HU and Power Acoustik.

Now....I had a cheap 8.99 antenna in the fairing from AutoZone and I had the power line running next to the antenna plug and still could grab a few stations. My guess is if I run the power on the opposite side and perhaps a boosted antenna and I would be fine.

I lost no reception with the HK and RF PBR.

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Old

Dec 7, 2014 | 06:16 PM

#4

BlackPearl#1

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From: Black River Falls, WI.

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I will standby and watch what others say, but I think it is a hit or miss with this one. To answer question. Head unit does not matter, from what I have read to date.

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Old

Dec 7, 2014 | 06:20 PM

#5

Gannicus

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From: Indianapolis IN.

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Quote:

Originally Posted by Cheesehead_13

Is the FM reception loss with Class D amps limited to the HK stock head unit? Meaning... if I replace the head unit with an aftermarket will I get FM reception back?

Nope - It's the switching circuits in the class D. HU doesn't matter.

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Old

Dec 7, 2014 | 07:06 PM

#6

Cheesehead_13

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Quote:

Originally Posted by Gannicus

Nope - It's the switching circuits in the class D. HU doesn't matter.

So is it proximity of the amp to the head unit that is the issue? Would mounting the amp in the rear solve it?

Sorry, I'm a dummy when it comes to this stuff.

Hmmm...http://www.dummies.com/how-to/consum...ectronics.html

OR

http://www.dummies.com/store/product...Id-322430.html

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Old

Dec 7, 2014 | 08:30 PM

#7

ridedaddy

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From: chatham il

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Might help, I lost some fm not all

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Old

Dec 8, 2014 | 07:23 AM

#8

UltraNutZ

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From: East of the Sun, West of the Moon

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Quote:

Originally Posted by Cheesehead_13

So is it proximity of the amp to the head unit that is the issue? Would mounting the amp in the rear solve it?

Sorry, I'm a dummy when it comes to this stuff.

Hmmm...http://www.dummies.com/how-to/consum...ectronics.html

OR

http://www.dummies.com/store/product...Id-322430.html

you'll have better luck making sure your power and ground wires are run on the opposite side of the wiring tray away from your antenna wire. Aside from that, it really doesn't matter where you physically place the amp. I've had some in saddlebags and lost reception and then again I've had some installed right on top of the head unit and had no effect on FM reception. It truly is a hit or miss kinda thing.

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Old

Dec 8, 2014 | 08:30 AM

#9

austinslider

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From: Colorado

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I didn't lose any FM reception with my SS. Although, I could care less if I lose FM since I use my iPhone.

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Old

Dec 9, 2014 | 01:51 AM

#10

just plain john

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From: Pasadena TX

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I've had both the SS520 and the PA2000D behind a Sony head unit and both killed FM reception.

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