polyfill + bandpass = good?
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=18623
Printed Date: May 07, 2024 at 10:26 AM
Topic: polyfill + bandpass = good?
Posted By: flatulatta
Subject: polyfill + bandpass = good?
Date Posted: September 07, 2003 at 7:28 PM
ive got a bandpass box and 2 compvr 12(2ohmS) should i put polyfill in my box and if so how much?
Replies:
Posted By: auex
Date Posted: September 07, 2003 at 8:32 PM
You have a bandpass box. The only thing you can do to make it better is to destroy it and build another box, sealed or ported.
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Posted By: flatulatta
Date Posted: September 07, 2003 at 8:40 PM
lol io bought it but im probably gonna trade it with my friend but i was just wondering if it would hurt anything putting polyfill in there
Posted By: auex
Date Posted: September 07, 2003 at 8:43 PM
It won't hurt as long as it stays away from the port.
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Certified Security Specialist
Always check info with a digital multimeter.
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Tell Darwin I sent you.
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Posted By: flatulatta
Date Posted: September 07, 2003 at 8:52 PM
k ma ports are low i think i can stay away from em though...... say i where to remove the plexiglass how would it react?
Posted By: auex
Date Posted: September 07, 2003 at 9:13 PM
It would sound horrible, worse then it does now. The bandpass box is specifically desinged. If you removed the plexi it would make it a ported box, ported boxes require alot more airspace then it has.
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Certified Security Specialist
Always check info with a digital multimeter.
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Tell Darwin I sent you.
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Posted By: flatulatta
Date Posted: September 07, 2003 at 9:16 PM
yea i just found that out im prob gonna convience ma friend for the trade hes got a ported box
Posted By: AudioAdrenaline
Date Posted: September 07, 2003 at 9:35 PM
You'll want to ckeck the comp vr specs to make sure the ported box is tuned right for your subs, or you'll subs will still sound like crap. The purpose of polyfill is to trick the sub into thinking it's in a larger box than it is. 50% polyfill = 20% increase in airspace the subs "sees". It's meant to give a little lower frequency response in sealed boxes. Bandpass and ported boxes are built to a very specific tuned frequency, and someone correct me if I'm wrong, but polyfill in one of the boxes won't really help at all.
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