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My amp gets real hot and then turns off, what is the problem? Also If i choose to the setting of "Low Pass" as the filter option, would this blow subs?

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Your amp is getting hot possiblily due to under power? of the amp. First try to turn the gain down (sensitivity) see if that helps, if not then add a fan to the amp to cool it. Also put the amp in an area where air runs freely....

Low pass means that it is allowing low frequency to pass by so No it won't blow your subs but it will hit certain frequencies!

Posted on Sep 19, 2010

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I put a sub in my 2002 Altima but when I turn it up the bass cracks on the door speakers??? What do I do to get all the bass on the sub


Hi Ethan,

What you're looking for is called a "crossover". A crossover is an electronic filter for an audio or speaker circuit. In an audio circuit, a crossover is used to prevent or pass certain frequencies or a range of frequencies from passing through it. Since your sub will reproduce the bass or low frequencies, you don't want other speakers to reproduce them. A band pass filter on your door speakers will do this for you. A band pass filter passes only a range or "band" of frequencies and blocks those that are above and below the range or band of frequencies selected. Installing a band pass filter will prevent the very high & very low frequencies from getting to the door /dash speakers. Likewise, you should consider connecting a low pass filter to your subs, too. The low pass filters work a little differently from of the way band pass filters work - they only allow low frequencies to get to the sub - blocking all the other higher frequencies (your other speakers are better suited to reproduce those). Lastly, you would install a high pass filters on tweeters. Tweeters are designed to reproduce only the high frequencies - sending mid and low frequencies to them is wasting power and can cause damage to them.

You purchase the filters for specific crossover points (the block / unblocked point) as determined by the individual speakers. If a sub has a frequency response of 20Hz - 100Hz, a low pass filter of 100Hz would be ideal. Remaining filters would need to begin at 100Hz - assuming the mid-range speakers have a frequency response beginning at 100Hz. A band pass filter of 100Hz - 3KHz would fit the bill nicely if the mid-range speakers go up to 3Khz Match the high end of the band pass to the high end of the frequency response of the mid-range speakers. Next, a high pass filter at 3KHz would allow only the high frequencies to your tweeters. Basically, you want to have the entire audible range 20Hz - 20KHz covered by the speakers and have the crossover points that match the frequency response ranges of the speakers.

I hope this helps & good luck!

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yes. this is not a jl audio amp. and does not give you the option to choose hi and/or low pass on the front side.

of course, you know the assumption is made that you'll drive the front amp through mid-range and tweets and the rear amp through your W0's.

you can however,
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b. then it would be easy to place an in-line low-pass coil so your subs only see frequencies below he cutoff range you choose.

its a pretty common electronics store/Radio Shack item, just a few bucks too.

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You could go with a type of passive crossover, and that should allow you to also control gain as well as the bass input, and you can also go with a low pass filter as well. These are quite inexpensive at Wal-Mart and other places, and just run in-line with the wiring. There is no real cutomizability with the latter option, but it could be a means to get better sound while you save for a stronger crossover.

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Hello michaelandta,

Check your filter settings on the front channels. It sounds like they may be set to "high pass" which would eliminate the bass frequencies. If you are using the amp to power normal speakers, it's usually best to set the filters for "full range". If the amp only has "low pass" and "high pass" settings, turn them both OFF.

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