my kicker s15l7 is moving too far

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=89768
Printed Date: April 27, 2024 at 4:52 PM

Topic: my kicker s15l7 is moving too far

Posted By: wildchildbmx6
Subject: my kicker s15l7 is moving too far
Date Posted: January 29, 2007 at 10:42 PM

when my sub hits certain frequencies it seems to over extend itself and make a popping sound. it has only done it twice and happens in the low freq. ranges. i tried tuning my amp to a different frequency but it doesnt seem to do much. could it be the box im using? i have it in a ported 5 cube box tuned to about 45 hertz. ive been wanting to change the box but havent gotten to it. any ideas or suggestions

Replies:

Posted By: haemphyst
Date Posted: January 30, 2007 at 9:32 AM

You have not turned on any subsonic filter. You shouldn't ever run a subwoofer lower than the vent tuning frequency. 45Hz is WAY high, and there is a tremendous amount of musical information below that frequency. Turn your filter on, and that should prevent this from happening.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: wildchildbmx6
Date Posted: January 30, 2007 at 12:29 PM

my amp doesnt have a filter. what should i do?

Posted By: haemphyst
Date Posted: January 30, 2007 at 12:52 PM

1: Build a box with a lower tuning point
B: Build a sealed box
3: Use an external crossover with a subsonic filter
D: Turn the bass down (THAT's not gonna happen, I bet - that's probably why you bought the S15L7 in the first place posted_image

)

Those are your options...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: wildchildbmx6
Date Posted: January 30, 2007 at 1:22 PM

huh? turn the bass down? i dont understand what that means. lol i figured i would need a lower tune, but what should i set it to? does the sub Fs have anything to do with tuning

Posted By: haemphyst
Date Posted: January 30, 2007 at 4:18 PM

Ah, yes... I remember those bass-heavy days! The days I just didn't want to turn it down... "Hi, I'm Dave, and I'm a basshead. I have been bass-clean for ten years." posted_image

Well, yes. The Fs of the woofer will help determine two things:

First, it will help determine how low it can actually play with any efficiency, in an optimum sealed box.

And second, it will help determine a (the) optimal tuning frequency for a vented enclosure, for flattest frequency response.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: wildchildbmx6
Date Posted: January 30, 2007 at 11:05 PM

thanks for the help. im definitely going to build a new box tomorrow

Posted By: hottwhyrd
Date Posted: January 31, 2007 at 1:28 PM

i found a non powered rca level adjustible subsonic filter from some company on the net. wish i could remember where tho!

ne ways it was cheap and it worked great till i switched back to a sealed box. (i needed to hear rock music)

Posted By: haemphyst
Date Posted: January 31, 2007 at 3:31 PM

I believe you are referring to these:

Harrison Labs F-Mods.

You'll want a HIGH-PASS pair that will be fairly close to your woofer boxes' tuning frequency. If you are planning on sticking close to 45Hz (shudder), don't use an F-Mod with a LOWER point than, I'd say, 30Hz. Higher might be even better, if the issue is still present.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: wildchildbmx6
Date Posted: January 31, 2007 at 5:46 PM

i plan to build another box at around 32Hz or so.

Posted By: haemphyst
Date Posted: February 01, 2007 at 8:31 AM

Then use a 30Hz F-Mod.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."