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Old 07-08-2019, 08:49 PM   #1
Scooby Newbie
Member#: 486228
Join Date: May 2018
Chapter/Region: MWSOC
Location: KS
2015 WRX

Default 2015 WRX speaker whine(h/k system)

So I thought it was my Kenwood causing a whine in my speakers but now that's it's getting repaired and no headunit is installed it remains....kicker if I'm at idle perfectly silent it only seems whine at cruise. Any suggestions on what I need to ground?
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Old 07-14-2019, 04:59 PM   #2
Scooby Newbie
Member#: 352266
Join Date: Apr 2013

sounds like an issue with the amplifier. perhaps a bad solder connection inside the amp or something like that. assuming everything else is stock beside the missing kenwood head.
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Old 07-14-2019, 05:24 PM   #3
Scooby Newbie
Member#: 305130
Join Date: Dec 2011
Chapter/Region: South East
Location: LFT
2019 WRX
Dark Gray


I'm actually shocked there is amplifier whine without the HU to turn it (them) on. If it is the stock amp, then something connected to it is causing the whine. It could even be the Maestro box if you are using that to control the volume on the stock amp.

If it is an aftermarket amp, the noise could be ground related, RCA related, or be coming in through the remote turn-on lead connected to the car versus the radio's remote turn-on lead.
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Old 07-16-2019, 01:21 AM   #4
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Join Date: Jul 2019

trying to post
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Old 07-16-2019, 09:23 AM   #5
Scooby Specialist
Member#: 472037
Join Date: Jul 2017
Chapter/Region: MWSOC
2018 WRX Limited


Most factory upgrade system has separate amp that turns on with interior power even when the HU is not turned on.
I think it maybe a bad amp or a bad ground loop.
The other thing could be a bad voltage regulator allowing too much noise passing into the electrical system.
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Old 07-17-2019, 08:49 AM   #6
Scooby Newbie
Member#: 504346
Join Date: Jul 2019

Sounds like the amp. I had a 2005 Trailblazer before my Subaru and the speaker would whine constantly while driving. I replaced the amp and it stopped however I know that a loose connection will also do that.
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