USA-spec PA15 - high pitched sound

JRod · 04-19-2008, 05:31 PM

I just installed the USA-Spec PA 15 & hooked in my XM radio. When I play the XM radio I get a high pitched constant sound. It gets worse when I plug in my IPOD at the same time. I have a good quality monster cable going to my XM. Any thoughts?

rhoppas · 04-19-2008, 07:15 PM

That sucks! I am not experienced with the USA-Spec device but I believe it has a set of dip switches. Have you verified that they are set properly? If so, maybe you just got a bad one...

JRod · 04-20-2008, 04:58 AM

Yeah - the dip switches are pretty basic. 1 is to turn on/off the aux input & the other 3 relate to the radio depending on what toyota you have. The taco setting is to have all 3 on. My XM is a portable - TAO that I plug in/take out. I'm going to try my wife's portable delphi & see if it makes a difference...hopefully, the antenna cable matches.

camsbored · 04-20-2008, 08:43 AM

The whine is probably from an improperly isolated ground loop... do you notice it change pitch with engine revs? I've had similar problems on my VW with the USA-Spec adapter and even on my home stereo when connected to a computer. The solution is to use a ground loop isolator, easily bought from RS:

http://www.radioshack.com/sm-buy-the...i-2062214.html

Good luck!

JRod · 04-20-2008, 01:37 PM

Thanks to all for the input. I found the problem...my XM radio. The charger was causing the whine - the battery is dead and something's not right with the power. My wife's XM radio worked perfectly with it. At least now I know what the solution is.

04-19-2008, 05:31 PM	#1
JRod Kratos Joined: Mar 2008, #5042 Posts: 3 07 Dbl Cab SR5 TRD 2007 Double Cab Automatic V6 Bakflip cover, Westin Nerf Bars, Husky liners, Tow Pkg, USA-SPEC PA15,	USA-spec PA15 - high pitched sound I just installed the USA-Spec PA 15 & hooked in my XM radio. When I play the XM radio I get a high pitched constant sound. It gets worse when I plug in my IPOD at the same time. I have a good quality monster cable going to my XM. Any thoughts?

04-20-2008, 04:58 AM	#3
JRod Kratos Joined: Mar 2008, #5042 Posts: 3 07 Dbl Cab SR5 TRD 2007 Double Cab Automatic V6 Bakflip cover, Westin Nerf Bars, Husky liners, Tow Pkg, USA-SPEC PA15,	USA-spec PA15 - high pitched sound Yeah - the dip switches are pretty basic. 1 is to turn on/off the aux input & the other 3 relate to the radio depending on what toyota you have. The taco setting is to have all 3 on. My XM is a portable - TAO that I plug in/take out. I'm going to try my wife's portable delphi & see if it makes a difference...hopefully, the antenna cable matches.

04-20-2008, 01:37 PM	#5
JRod Kratos Joined: Mar 2008, #5042 Posts: 3 07 Dbl Cab SR5 TRD 2007 Double Cab Automatic V6 Bakflip cover, Westin Nerf Bars, Husky liners, Tow Pkg, USA-SPEC PA15,	found problem Thanks to all for the input. I found the problem...my XM radio. The charger was causing the whine - the battery is dead and something's not right with the power. My wife's XM radio worked perfectly with it. At least now I know what the solution is.

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04-19-2008, 07:15 PM	#2
rhoppas Northern Alliance Ally Joined: Aug 2007, #2564 Location: Topeka, KS Gender: Male Posts: 883 07 Double Cab V6 TRD Sport Tow 2007 Double Cab Automatic V6 Viper alarm, Hunter4x4 Bull Bar, 6" Pro Comp Off-Road lights, extra set of bed D-rings, Chrome exhaust tip, Metra Ipod/MP3 adapter, Garmin GPS, CarriageWorks grill, Maglite mounted to driver seat, 9" Stubbie Antenna, WeatherTech floor liners	That sucks! I am not experienced with the USA-Spec device but I believe it has a set of dip switches. Have you verified that they are set properly? If so, maybe you just got a bad one...

04-20-2008, 08:43 AM	#4
camsbored Senior Member Joined: Apr 2008, #5932 Location: Raleigh, NC Posts: 153 08 PreRunner DC/Sport/LB 2008 Double Cab Automatic 4.0L V6 Kenwood DNX8120, Homelink mirror, Valentine One hardwire	The whine is probably from an improperly isolated ground loop... do you notice it change pitch with engine revs? I've had similar problems on my VW with the USA-Spec adapter and even on my home stereo when connected to a computer. The solution is to use a ground loop isolator, easily bought from RS: http://www.radioshack.com/sm-buy-the...i-2062214.html Good luck!