Amp for L7
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=11662
Printed Date: July 25, 2025 at 8:47 PM
Topic: Amp for L7
Posted By: Cletis
Subject: Amp for L7
Date Posted: March 30, 2003 at 11:35 PM
I am in the process of redoing my system. I am putting in one Kicker 12" L7, and am curious on what amp you all might recommend. Right now I have a Rockford Fosgate 500a2, it pushes out a little over 600W x 1 @ 4ohms. The L7 handles 750 rms. Do you think I'll be okay with the RF, and if not what would you guys recommmend.
Replies:
Posted By: esmith69
Date Posted: March 31, 2003 at 9:50 AM
I thought that amp is only supposed to put out 500 watts RMS? Well all the more reason to keep using that amp. No point in spending money on an amp that'll just take you from 600 watts to 700 watts. You're better off saving that money to upgrade another component of your system.
Posted By: x6369x
Date Posted: March 31, 2003 at 4:51 PM
Stay with the Rockford. The difference between 600 to 750 watts is minimal.
What kind of box do you have (sealed/ported)? You may get an increase of dB's depending on the box you have. Check out Kicker's site.
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Friends Don't Let Friends Bump Stock.
Posted By: Cletis
Date Posted: March 31, 2003 at 4:55 PM
I just dug at the actual test sheet for my amp and it actually puts out 710W mono into 4ohms, so I am definitely going to stick with it. On kicker's website it says that if you build a vented enclosure you need to use a subsonic filter. Does anyone know if this is really necessary, and if so where do you get one.
Posted By: x6369x
Date Posted: March 31, 2003 at 6:39 PM
Subsonic filters are normally built into the amps. A subsonic filter is recommened by Kicker to increase the life of the woofers, by blocking out the signals under a certain frequency. My newer Kicker KX600.1 has one, and is set for -12dB @ 25 hz. Normally, any notes under 25 hz is not audible.
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Friends Don't Let Friends Bump Stock.
Posted By: Cletis
Date Posted: March 31, 2003 at 11:46 PM
I don't think that the Punch 500 has a built in subsonic filter, but I know that you can by inline ones for your rca cables for $30. Would not using one really cause damage to my sub like Kicker says it will, or would it just be a waste of money.
Posted By: esmith69
Date Posted: April 01, 2003 at 6:47 AM
If you're using a ported/vented box then it's not necessarily VITAL but it might be a good idea. It's much more important in my opinion to build a box that matches the specs. that the manufacturer provides, such as ideal volume/port length/diameter, etc. Unfortunately there's no 100% right or wrong answer, because it's not something you would be able to notice immediately anyways. Some people abuse their subs, and for them the subs won't last longer even with a subsonic filter. Similarly, you can't really know for sure whether or not a shortened product life is the result of misuse/abuse by the owner, or the result of not using a subsonic filter. Certainly if it's a sealed box design (which I'd recommend over a vented box anyways), you will not need the subsonic filter.
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