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low freq problem


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blockbeat07 
Member - Posts: 4
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Joined: May 31, 2007
Location: United States
Posted: May 31, 2007 at 2:04 PM / IP Logged  
I have 2 12" cvr kickers, 800watts each, hooked up to a 1600watt boss amp and 4 some reason when i play certain song with low bass the woofers dont sound good.......they almost sound like their "bottoming out", but i dont wanna jump to conclusions. Anyone have any advice or knows whats going on.
low freq problem -- posted image.
loosingmymind 
Copper - Posts: 103
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Joined: August 24, 2004
Location: United States
Posted: May 31, 2007 at 6:15 PM / IP Logged  

Improper box size can make anything bottom out, but you may have other problems.

Are they sealed together, sealed seperatelly, ported single, dual ports, ect. Give us some more info, please.

David Fancher
USACi World Finals 2006
4th Place SQ PRO 601+
Steven Kephart 
Platinum - Posts: 1,737
Platinum spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: November 06, 2003
Location: Oregon, United States
Posted: May 31, 2007 at 8:17 PM / IP Logged  
My guess is that you are hearing a clipped signal.  It's surprising how mechanical clipping can sound.  Make sure the gain is set correctly and that the bass boost is turned off.  The next possibility would be an improper enclosure as David mentioned. 
blockbeat07 
Member - Posts: 4
Member spacespace
Joined: May 31, 2007
Location: United States
Posted: June 01, 2007 at 1:37 AM / IP Logged  
They are both in a sealed enclosure. But my guess was that the box may be the problem 2, it may be too small.
low freq problem -- posted image.
Steven Kephart 
Platinum - Posts: 1,737
Platinum spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: November 06, 2003
Location: Oregon, United States
Posted: June 01, 2007 at 1:56 AM / IP Logged  
Too small an enclosure wouldn't cause the subs to bottom out.  In fact the opposite would be true.  Efficiency would be lower, as would low frequency extention where you get woofer excursion from.  Where are you getting your signal from?  Are you using an aftermarket head unit with RCA outs, or are you using a hi/low converter?  If aftermarket, what is the rated voltage on the pre-outs?  Where is the gain set on the amp?  Do you have the bass boost on the amp turned up at all?  Who did the installation?

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