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Old 04-19-2013, 11:29 PM
djkslc djkslc is offline
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2013 x 10 hissing noise in speakers

My buddy's 13 x10 stereo hisses while the boat is running and the stereo is on. Driving us crazy. What causes a stereo hiss?
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Old 04-20-2013, 12:01 AM
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texasjet texasjet is offline
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Only thoughts might be if you have on the blowers. Have seen that create a buss when I am using an iPod.
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Old 04-20-2013, 12:57 AM
Skyskiguy Skyskiguy is offline
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Ground loop.
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Old 04-20-2013, 01:11 AM
djkslc djkslc is offline
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How do you fix a ground loop? The dealership has had it twice now and the dang thing still hisses.
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Old 04-20-2013, 02:06 AM
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Well an easy solution is a pair of ground loop isolators from the head unit to the amps. Cost about $25 per set of RCA'S.

http://www.monoprice.com/products/pr...seq=1&format=2
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Old 04-20-2013, 09:06 AM
pap pap is offline
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I think ground loop is typically a hum/buzz. A hiss is typically a gain set too high or can be a bad amp or preamp.

How loud is this hiss and is it really a hiss or a buzz/hum?
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Old 04-20-2013, 10:01 PM
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cdstukey cdstukey is offline
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Try cleaning or replacing the needle on the turntable. Sometimes stuff gets stuck on there.
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  #8  
Old 04-20-2013, 10:13 PM
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Quote:
Originally Posted by djkslc View Post
My buddy's 13 x10 stereo hisses while the boat is running and the stereo is on. Driving us crazy. What causes a stereo hiss?
The amplifiers have controls on them for setting the input levels and yours are way too high. It's likely that they're all the way up, which will not only cause you to hear engine noise (under the right conditions) and you'll definitely hear hiss.

What equipment is in the audio system- list everything. If it's JL, go to their site and read their setup method- it's about the best I have seen without needing an oscilloscope.
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Old 04-20-2013, 10:13 PM
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JimN JimN is offline
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Originally Posted by cdstukey View Post
Try cleaning or replacing the needle on the turntable. Sometimes stuff gets stuck on there.
Dude- it has an 8 track. Jeez!
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Old 04-20-2013, 10:24 PM
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swatguy swatguy is offline
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So is tge hiss constant? Or does it get louder and change pitches when the boat runs and the rpms go up?

A constant hiss/white noise is usually related to a gain mismatch. Meaning it is set way to high. While MC boats are built with quality and use high end audio NO attention is taken to wiring up stereo and setting it all up correctly. The only hope u have is your dealer, usually the mechanics at regular dealers are not stereo gurus so again not much help there.


Give us some info on what equip he has and what speakers are hissing. Again we want to make sure you are talking a constant hiss not a fluctuation of noise related to the rpms jumping up. If the rpm do cause it to change then its going to be a ground issue. First things first make sure your head unit and amp/amps are grounded to the same point. Not the head unit grounded unde the dash and the amp grounded to the battery. They both should go a) to the battery or b) to a common ground like a distribution block(and not te one under the dash that has the rest if the boats grounds)

Another possibility that happens often is people get a new boat. So pumped with all the new stereo gear the immediately crank it to its max. Te stereo again has not been tuned so there is a ton of distortion and u fry a tweeter or mid right away causing a buzz in the line output than can be heard throughout. Not as common as the gain or ground issue but happens more than people think.
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