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Subwoofers not hitting as hard as it should.

I have a alpine 1000w mono amplifier for my two 10in JL audio W3's, I also have a set of infinity component speakers and another pair of kappa speakers hooked up to an alpine amplifier. Both of these amps are running through a 30 farad ackoustic capacitor which is getting its power charge from an optimum yellowtop battery that its hooked up to, It has been hitting hard and sounding very nice and I wouldnt be able to turn my stereo up to loud without having to turn my subwoofers down they were hitting so hard, recently my alternator stopped working and had to be replaced, they replaced it with a remade alternator but assured me it works like a new one but ever since then my subs have not had the same kick and arnt hitting nearly as hard as they used to, now I have to have the subs turned up all the way and the volume louder than I would normally have it and even then they sound weaker than usual. I need help diagnosing this problem as well as a solution to it so I can get my good sound back. thanks

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  • lilpunk1024 Apr 15, 2009

    my sub just dont hit as hard as it used to

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First thing when your care is idleing turn you system up and watch your rpms. Is it going all over the place when you turn it up?If so your altenator isn't putting out enough power.Might be able to fix that problem with another fadar cap. You should buy the digital read out for your cap to see how bad its draws power.They have ones that will mount to the top of your fadar cap.You can all so get a bigger altenator.Also check your ground clean it along with other connection batter,both sides of you fuse and any other connection,bass will loose all bolts/screws over time because of the bass,even to sub have had one work its way off in a year once.

Posted on Mar 03, 2009

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Generally, you want to have the load on your amp to have the lowest possible impedance consistent with the amps capability to operate properly with that load. It's normally referred to as "impedance matching". Greater power (watts) is produced, and louder sound, when the amp can deliver power at a lower impedance.

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