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  1. #1
    Join Date
    Dec 2006
    Location
    Tigard, Oregon
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    3,016

    Default Speaker Wire Routing

    I am going to be replacing the speaker wires to all the cabin speakers as part of my stereo upgrade project. I was thinking of running the wires from the starboard speakers thru the footbox, around the center ski locker, up the hole in the floor by the batteries and to the amps. Is there anything wrong with routing them this way? The speaker wires will be running alongside the pos & neg battery cables that go around the ski locker to the distribution block under the dash. Is there a potential for the speakers to pick up noise this way?

    I noticed the factory routed the speaker wires either around the bow or around the back of the boat which is a longer run than going thru the ski locker. I'm wondering why they did it that way. Maybe because of the noise potential, or maybe because they run the wires before the top and bottom parts of the hull are joined together so it's easier to do it the way they did.

    Thanks,

    Al
    Al

    2006 Mobius LSV

  2. #2
    Join Date
    Apr 2008
    Location
    California
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    2,840

    Default

    They did it that way to keep it away from the power cables i'm sure. I would stick with the factory routing, remember your sub wires are already running through there.
    2007 Mobius LSV

  3. #3
    Join Date
    Jun 2008
    Location
    De Pere WI
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    4,226

    Default

    fwiw,
    I'm running all the rca and speaker level cables around the boat. going to cost a tad more, but the chance for noise is decreased, especially from the rca cables, and keeps them out of that environment. the signal loss from a longer run will be non-detectable if you use good quality cable.

    interestingly enough, my factory routing has the rca's and speakers ran around the front of the boat, but the rca's for the sub are ran tied to the power/ground for the main fuseblocks thru the ski locker.
    wierd...
    '06 Supra Launch 20SSV-gone but never forgotten

  4. #4
    Join Date
    Apr 2008
    Location
    California
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    Default

    Quote Originally Posted by sandm View Post
    interestingly enough, my factory routing has the rca's and speakers ran around the front of the boat, but the rca's for the sub are ran tied to the power/ground for the main fuseblocks thru the ski locker.
    wierd...
    I believe all the boats are done like that, mine was.
    2007 Mobius LSV

  5. #5
    Join Date
    Dec 2006
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    Tigard, Oregon
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    Default

    Quote Originally Posted by sandm View Post
    fwiw,
    I'm running all the rca and speaker level cables around the boat. going to cost a tad more, but the chance for noise is decreased, especially from the rca cables, and keeps them out of that environment. the signal loss from a longer run will be non-detectable if you use good quality cable.

    interestingly enough, my factory routing has the rca's and speakers ran around the front of the boat, but the rca's for the sub are ran tied to the power/ground for the main fuseblocks thru the ski locker.
    wierd...

    sandm,

    Our Moombas have the head unit in the glove box so the RCA cables are a non-issue. I've got about a 4' run from the head unit to the amps and I bought some good quality 6' RCA cables for that. As far as speaker wire, the little bit of added cost is a non-issue. It's just easier to route it thru the ski locker and I also want to minimize the length of the run for the best possible sound.

    Razz,

    So you think I'd pick up some noise into the speaker wire from the battery cables that run to the distribution block?

    Thanks,

    Al
    Al

    2006 Mobius LSV

  6. #6
    Join Date
    Apr 2008
    Location
    California
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    2,840

    Default

    It is very possible Al. One of the guys had this issue awhile back and it's a pain to diagnose and get rid of, not worth the risk imo.

    As far as the run itself Al, you'll never notice the difference running it through the locker versus around the bow. That is of course unless you get noise! I've left mine run around the bow and it's clear as a bell and the speakers get plenty of signal strength.
    2007 Mobius LSV

  7. #7
    Join Date
    Mar 2008
    Location
    Vancouver WA
    Posts
    2,633

    Default

    Someone correct me if I'm wrong but the potential for engine noise in a boat is far less in a boat then in a car. I've see many set-ups with all the wires zip tied tightly together with no engine noise. That said I always follow the rule to reduce the risk. I always run RCA's and speaker wire together away from power/ground.
    Two reasons they run the wires around the bow. Its installed before the top half it put on, and since they heve to run wires up to the front speakers anyway they go ahead and go the rest of the way around.


    PWI as usual...

  8. #8
    Join Date
    May 2009
    Location
    Carlton Oregon
    Posts
    6,062

    Default

    Quote Originally Posted by sandm View Post
    fwiw,
    I'm running all the rca and speaker level cables around the boat. going to cost a tad more, but the chance for noise is decreased, especially from the rca cables, and keeps them out of that environment. the signal loss from a longer run will be non-detectable if you use good quality cable.

    interestingly enough, my factory routing has the rca's and speakers ran around the front of the boat, but the rca's for the sub are ran tied to the power/ground for the main fuseblocks thru the ski locker.
    wierd...
    Im pretty sure the reason they run the sub threw the Ski Locker is easy at instalation. I know when i had my sub installed thats what they did. It was an outsourced stereo company that AWS used and they are going as fast and cheap as they can since the customer < you is not present in that deal > Luckily i used some very thick wire and very thick insulation to my sub, the wire they used originally is a 4 wire braid in 1 sleeve thats commonly used to run up threw a tower.
    Malo <--- Means--Evil or Mean One. This explains a lot.
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  9. #9
    Join Date
    Jun 2008
    Location
    De Pere WI
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    4,226

    Default

    mine was factory installed I believe. mine was the '06 brochure boat that skiers used for 80 hrs, then we bought it as new. rca wiring was through the ski locker, but the actual sub speaker wiring was ran around the bow of the boat with the rest of the rca's and speaker wire..
    '06 Supra Launch 20SSV-gone but never forgotten

  10. #10
    Join Date
    May 2009
    Location
    Dallas, TX
    Posts
    880

    Default

    The original post pertains to speaker wiring so I'll keep it on that topic. Its very difficult to introduce radiated noise into a speaker wire like you would have with live-level RCAs. The exception would be the inductors in passive crossovers so their location in respect to engine management electronics and such would be important. In countless boat installations I can't recall a single instance in which we had to relocate speaker wiring due to noise. There simply isn't enough inherent gain in the noise source for speakers to pick it up. In contrast, you're seriously amplifying whatever minute level a line-level RCA picks up.

    David
    Earmark Marine

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