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  1. #1
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    6,368

    Default 2017 Mojo Stereo Noise

    So we just finished our install in our new 2017 Mojo and we are trying to fight some noise issues. Below is what we have an how it is installed.

    4 Rev10s powered by an SD2
    6 XS650RGBs power by channels 1-4 of an SD6
    1 XS12 Sub powered by channels 5-6 of the SD6
    WS420

    So I have two golf cart batteries wired in series to terminal 2 of the battery switch and one starting battery wired to terminal 1.
    Coming off of the common post on the battery switch is the wire going to the starter, wire going to the breaker for the house accessories, and my power wire going to the my added distribution block.

    Coming off my distribution block I have 4 gauge going to the SD2, 4 gauge going to the SD6, and 8 gauge going to a bus bar that I added on the back of the amp rack. The bus bar that I added provides power and ground to the factory Fusion head unit (turn on and actual power) and the 12V power for the WS420. The added bus bar also provides power and ground to relay I added for the remote turn on of the amps and WS420. When the fusion head unit is powered on it sends remote turn on power to the relay which in turn sends power to the amps and WS420.

    My RGB controller gets its power from one of the stock acc switches at the helm and is grounded to the stock bus bar at the helm.

    I have slight noise when the stock courtesy, nav, or anchor lights are on. Medium noise when the RGB lights are on. And bad noise when the ballast pumps are on. What did I do wrong here??


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    David

    2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights

    SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD

  2. #2
    Join Date
    Aug 2013
    Location
    DFW
    Posts
    857

    Default

    Sounds like an install issue
    Matt
    2021 Mojo
    2016 Mojo (sold)
    2012 LSV (sold)

  3. #3
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    6,368

    Default

    Quote Originally Posted by Woody929 View Post
    Sounds like an install issue
    Please point me to where I went wrong on the install loo


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    David

    2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights

    SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD

  4. #4
    Join Date
    May 2009
    Location
    North End Lake Lanier GA
    Posts
    8,155

    Default

    I am leaning to the buss bar, when you tied the Acc switch into your Power and Ground of the stereo buss you introduced that noise in the system.

    You can use the Remote turn on Relay in this junction to send the remote turn on signals.

    I have the ACC switch powering my head unit, my head unit is grounded the same location as my stereo amps.
    How ever nothing else on my ACC switch have any common ground to my stereo system.

    I would move > My RGB controller gets its power from one of the stock acc switches at the helm and is grounded to the stock bus bar at the helm <
    Move the ground. I think this needs to be grounded with your stereo buss ground.

    My other concern is you have the Power to the head unit tied into your Amp buss, noise from your ACC might be traveling to your head unit, and because power and ground are on your buss traveling to the stereo.

    I kept my head unit power in the factory power location and only moved the ground.
    Malo <--- Means--Evil or Mean One. This explains a lot.
    2013 Mojo 2.5 Skylon Tower. Bestia < Beast >
    [COLOR="#696969"]

  5. #5
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    6,368

    Default

    Quote Originally Posted by mmandley View Post
    I am leaning to the buss bar, when you tied the Acc switch into your Power and Ground of the stereo buss you introduced that noise in the system.

    You can use the Remote turn on Relay in this junction to send the remote turn on signals.

    I have the ACC switch powering my head unit, my head unit is grounded the same location as my stereo amps.
    How ever nothing else on my ACC switch have any common ground to my stereo system.

    I would move > My RGB controller gets its power from one of the stock acc switches at the helm and is grounded to the stock bus bar at the helm <
    Move the ground. I think this needs to be grounded with your stereo buss ground.

    My other concern is you have the Power to the head unit tied into your Amp buss, noise from your ACC might be traveling to your head unit, and because power and ground are on your buss traveling to the stereo.

    I kept my head unit power in the factory power location and only moved the ground.
    So I don't have an acc switch for the head unit turn on. The 12V turn on for the head unit is always seeing power. I just use the on off button to turn it on and off. The Acc switch ONLY controls the RGBs.


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    David

    2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights

    SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD

  6. #6
    Join Date
    May 2009
    Location
    North End Lake Lanier GA
    Posts
    8,155

    Default

    Then my only other thought is the power wire from your Battery Switch power wire going to the my added distribution block.

    Is the added distribution on your stereo side?

    I have all my stereo power ground distribution blocks ran directly to the golf cart battery bank. My golf cart bank goes to my battery switch.

    The only downside is if my golf cart batteries go dead, I have no stereo. I have to start the boat up and let them charge up.

    I have my golf cart bank completely isolated from the house power other then a ground wire connecting the two banks, and the battery switch getting power on post 1 and 2.
    Last edited by mmandley; 06-26-2017 at 03:01 PM.
    Malo <--- Means--Evil or Mean One. This explains a lot.
    2013 Mojo 2.5 Skylon Tower. Bestia < Beast >
    [COLOR="#696969"]

  7. #7
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    6,368

    Default

    The added distribution block goes from the common terminal of the battery switch and deploys off to all the audio components. I think I found the problem. I think I need to move the house ground to my added distribution block as per this

    "All audio source unit and processor supplies and grounds will be removed from the factory harness and procurred from the same distribution blocks as feeding the amplifiers. You will fuse the source unit supply at or close to the positive distribution block. Use a 14 ga. min./ 12 ga. max. + & - for the source electronics run. You'll have no noise with this scheme.







    Sent from my iPhone using Tapatalk
    David

    2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights

    SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD

  8. #8
    Join Date
    May 2009
    Location
    North End Lake Lanier GA
    Posts
    8,155

    Default

    If you have a House ground sharing anything with Audio then you can expect to hear house noise in the audio
    Malo <--- Means--Evil or Mean One. This explains a lot.
    2013 Mojo 2.5 Skylon Tower. Bestia < Beast >
    [COLOR="#696969"]

  9. #9
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    6,368

    Default

    Quote Originally Posted by mmandley View Post
    If you have a House ground sharing anything with Audio then you can expect to hear house noise in the audio
    Hhhmmmm not according to that. Interesting


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    David

    2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights

    SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD

  10. #10
    Join Date
    Oct 2010
    Location
    Lake Wylie NC Area
    Posts
    2,467

    Default

    All grounds end up common, but the difference is the distance separating their terminations. In some cases, a common BUS is not as good as the main audio trunk ground being battery direct.

    Are the head unit EQ sharing a common B+ and B- that branch off to each behind the helm or does each have its own B+ and B- coming off the audio distribution block on the port side? A little difference in resistance could create a ground loop.

    Also, have you moved the ground reference jumper in the WS-420?

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