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  1. #1
    Join Date
    Jul 2009
    Location
    Spokane, WA
    Posts
    488

    Default Tinny Sound from Speakers when using iPhone

    Hey guys, hoping some of you might have experienced this before.

    Setup:
    Kenwood Excelon X494 (I think that's the number)
    Kicker 200.4 running tower (all bridged)
    Kicker 700.5 running inboats (cabin speakers bridged on one channel, bow speaker not bridged on
    second channel and 10" solobaric dual 2 ohm sub (run in series to get 4 ohm load)
    All in-boats and towers at Polk Audio

    After several hours of pretty constant play using an iPhone connected via iPhone cable thru USB, I get a tinny noise coming from the speakers whenever a bass note is played. Regardless of volume, and regardless of fade. If I have the tunes faded all the way to the towers, I can still hear the tinny noise coming thru the inboat speakers. It's really really bad at times, and comes thru all speakers. The only way I've found to cure it, for a little while, is to shut the stereo down and let things cool. But, it inevitably comes back.

    I have always had a strange high pitched whine coming from my 700.5, but it never affected the sound quality. Not sure if that's the deal, or if it's the headunit, or the iPhone cable. I have run with this arrangement with several different iPhones and it happens will all - so I've ruled out my phone. I'm pretty sure it's not the amps becuase it comes thru all speakers and there are two amps.

    Any input from you guys would be awesome!!!
    08 LSV
    Go big, or go home.

  2. #2
    Join Date
    Oct 2010
    Location
    Lake Wylie NC Area
    Posts
    858

    Default

    If its only present while using the USB and not CD, Tuner or other mode, then is definitely source unit related and not RCA's amps or speakers. Have any mods, like a house battery and switch, been done that may have placed the head-unit B+ and B- on a different battery then the amps?

  3. #3
    Join Date
    Jul 2009
    Location
    Spokane, WA
    Posts
    488

    Default

    I'm thinking the same - that's is a head-unit issue.

    I have added a second battery, with a switch and relay. The house battery is running the head unit and amps.

    I'm honestly hoping it's just a head unit issue, as that's a pretty easy fix. I can't imagine that it's an amp thing, as the sound comes thru all speakers, which are on different amps.
    08 LSV
    Go big, or go home.

  4. #4
    Join Date
    Jun 2012
    Location
    Sugar Land, TX
    Posts
    617

    Default Tinny Sound from Speakers when using iPhone

    Mine had the whine until I turned down the output on my amp.
    2011 Mobius LSV

    Ron

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