Tuning Subwoofer

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silvercelica

Member - Posts: 2

Joined: February 02, 2006

Location: Canada

Posted: February 02, 2006 at 5:01 PM / IP Logged

Hey, I have joined this forum in seach of some help. I have recently built a box for my Solobaric l7. I built it to kicker specs in an 3.25 cf ported box. Now it says in the manual that I must use a 25 Hz sobsonic filter set at 24 db/octave. Is this a seperate piece or can I tune using my amp? The amp is a Rockford Fosgate 800.2 http://www.crutchfield.com/S-qL01NnTS0na/cgi-bin/Prodview.asp?readmore=true&i=575G18002#Tab My question is how do I go about setting up my subwoofer as required. Thanks in advance.

c&s evo7

Member - Posts: 4

Joined: February 02, 2006

Location: United Kingdom

Posted: February 02, 2006 at 5:33 PM / IP Logged

There is no subsonic filter on that amp. You would need to buy or make one . however you do not have to use the filter it will work without it, they are just recomending one as it can protect the woofer from over excursion. when its not at the tuned frequency.

silvercelica

Member - Posts: 2

Joined: February 02, 2006

Location: Canada

Posted: February 02, 2006 at 5:40 PM / IP Logged

But with the subsonic filter it can handle 750 watts and without it 400 watts according to kicker. What should the crossover frequency be set to anyhow?

c&s evo7

Member - Posts: 4

Joined: February 02, 2006

Location: United Kingdom

Posted: February 02, 2006 at 6:12 PM / IP Logged

i am sorry but i'm not at all familiar with kickers products, but it would seem strange why it allow so much more power handling than unfiltered. the filter prevents anything under 25hz to get to the woofer. at 24db/octave this would b a fairly steep cut off, best asking kicker tech i think.

j_darling2007

Copper - Posts: 210

Joined: January 21, 2005

Location: United States

Posted: February 02, 2006 at 6:32 PM / IP Logged

If the woofer's voice coil goes out of the magnet, it converts all the power being fed to it into pure heat, which will melt the voice coil. The subsonic filter starts to cut the power off at 24 hz, keeping the woofer from overextending and melting the voice coil.

There's no reason to neglect a nice sub because you don't want to fool with the subsonic filter, IMO. It would be money well spent.

There are 3 kinds of people in the world, those who can count and those who can't

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Tuning Subwoofer

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