Question about Car Speakers & Subwoofers

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Kicker L7 10" 2 ohms 600 watts Alpine M650 2 ohms 600 watts JVC KDG230 head unit 4 gauge wires, 60 amp fuse I've had my install done at Best Buy, broke my sub in, and everythingwas fine for several months. Recently my bass has been getting weakerand I'd have to turn up my gain or bass controls on the amp and/orheadunit to achieve the same amount of bass as i've had before. I went to Best Buy to get it checked out and everything seemed fine forsome reason. They couldn't find the problem. They used a voltmeter onthe car battery, amp, and subwoofer (making sure it was 2 ohms so therewas no blown voice coil) and everything was fine. They could offer nosolution and said that it was weird that i'd have to turn up everythingto achieve the same amount of bass. I took out the subwoofer today (I'm not an expert) and everythingseemed okay, nothing unusual. My bass is still weaker than it wasbefore. Do you think I'd need a new amp or is there any possibleexplanations for this problem? Thanks a lot in advance.

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  • thankyou12 Aug 01, 2008

    Thanks a lot Andrew Hawkins.

    I actually think I've fixed my problem. I tried experimenting with the low-pass filter and gain. I put the low pass filter to the highest Hz and lowered it about 20-30 hz each time while adjusting the gain, and the subwoofer all of a sudden started thumping with more air and bass like it used to. I eventually lowered it to 100 hz then 80 hz. I can now feel more bass at lower volumes where i couldn't before. My amp settings are now back to normal instead of being turned up more than they should. I think this could relate to maybe breaking the sub back in.

    Thanks again for the advice. I've been letting my car's electrical system and my ears take a break.

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I have an 04 L7, and recently it just stopped working in gereral. any way to test it? power lights turn on on the amps and i hooked another sub up to the amp but no problems. Someone suggest maybe voice coils blown?how can i check that? or how much to fix it? or would it just be easier to buy a new one and throw the other one out? thanks!Please send all comments to superchink15@aol.com thanks!

Posted on Sep 27, 2008

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If your bass level is dropping it suggests that some of the output transistors are failing in side the amp. What amp is it? it will also start to melt the solder joints if the amp is getting to hot which gives the same result
Good luck

Posted on Aug 05, 2008

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Best Buy is your problem! Just kidding....kind of. One thing that I would check is to see if there is by some strange reason, an air leak in your box. If there is a decent leak that will substantially bring down the sound output. Otherwise, but you could potentially be getting bad hearing or just getting use to the loudness. I have had the same thing happen to me. I work professionally at an audio shop and am an SPL competitor. There was nothing wrong with my system it just that my ears have gotten use to the beating. Let me know what you think.
-Andrew Hawkins

Posted on Aug 01, 2008

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1 Answer

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1 Answer

Serious contest


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just to give you an idea so maybe you can educate yourself alittle more before you get youself into this whole thing. im running 2 hifonics brutus bxi 2608s 2600 watts at 1 ohm rms. each one to 2 s15l7s 4 ohm dvc. a 300 amp alternator 2 batterys all 0 gauge wiring and the 30 farad cap. those subs and amps your talking about can pull serious amperage from your car in excess of 300 at a solid base note. let me know how you make out.... my email is motomartin315@aol.com if you have any more questions. just trying to help.

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1 Answer

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