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the other day i was driving down the road bumping as usual, and my bass cut out. i've had this setup for about 7 months now, and have never had probs. the volume wasn't too loud, and i dont know what is the problem. the green power light on the amp turns red for a couple seconds, which is when the subs cut out, then they'll come back on. I thought maybe the wiring was loose so i wentover everything and its all tight and good. I could use some help on this one.
my subs-2 10" mtx 4000's in bandpass box
my sub amp-coustic 240 se 2 channel

 
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Follow the wiring all the way to the speakers, a lot of amps will cut out if you cross polarities. I did an install on my BMW and had the same type of issue with a SoundStream amp. I ran the wires too close to the seat track so if I leaned the wrong way it would short out and the amp would clip off

The other possiblity is the battery drain may be cutting it out. I'm not a professional installer so i'm not sure this even applies to new/newer cars but if the battery is low and the alternator is having to work to keep it charged the amp just doesnt get enough juice.

 
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maybe your amp is getting too hot? some amps will shut off and go into protective mode when they get too hot.
where do you have it mounted at?

 
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check your ground! did you shave where you put the ground so it bear metal? if not it will start doin that.

 
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<< check your ground! did you shave where you put the ground so it bear metal? if not it will start doin that. >>



Check the ground yes... Check at the battery if the ring terminals getting corroded...and check the power and ground connections on your amp with a volt meter..see what kind of voltage your amps getting. if it's under 10 volts (usually ground problem) your amp will shut itself off..

 
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well i checked wires again and ground everything's good, so i went to the stereo shop to ask 20 questions. I guess my amp is too small to power these subs at high volumes, cause the bass only cuts out once i go past 2/3 volume lvl. but why did it work fine before at high volume?

 
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What's the Voice coils on your subs?.. and what's your amp stable to?

 
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amp is stable up to 2 ohms, which is the way the stereo shop set it up, and it ran fine, then it started messing up recently so i switched wires on amp to run at 4 ohms, sub is rated at 4 ohms. i think subs are single voice coils. at 2 ohms amp is rated 2x120 and at 4 ohms 2x60, but subs still cut out running at 4 ohms, just as with running at 2.

 
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What amp is it specifically.. and you can't switch an amp from 2 to 4 ohms.. that's impossible. What you do is wire the subs differently to present a different load to the amp.. sounds like your running the amp in 2ohms mono..which is not good. Most likely your amp is only 4ohm mono stable 2 ohm stereo stable..

 
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coustic 2 channel 240 se
yes, the subs were wired originally at 2 ohms then i wired them to 4 ohms after i started having probs, i hope that makes sense.
ttt until reply?

coustic amplifier 240se specs

 
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ttt until reply!

 
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any help yet?

 
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Ahh Coustic[IMG]i/expressions/face-icon-small-smile.gif[/IMG].. their amps are historically problem laden.. the amps also only 4ohm mono stable....No clue what could be wrong..but you may wanna upgrade if it's giving you troubles..

 
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that's a bummer, wish i knew that when i bought them.