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Joined: Feb 2004
Posts: 330
CEG\'er
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OP
CEG\'er
Joined: Feb 2004
Posts: 330 |
What exactly does a subsonic filter do, and do i need one for two 15 L7's in a ported box powered by hifonics Brutus???
97 V6 ATX 20,000 Miles
alpine cda 9811
Alpine MRV-F357
hifonics brutus BX2000D
2 Kicker L7 15
I NEED GREY LEATHER DOOR PANELS!!!!!!
Flip out monitor
PS2
Spr-175a
SPR-69LP
SPR-57LS
60 Ft EDEAD
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Joined: Aug 2001
Posts: 4,639
Hard-core CEG'er
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Hard-core CEG'er
Joined: Aug 2001
Posts: 4,639 |
it cuts out really really low frequencies that can be harmful to the sub.
Hugo AIM:omegazodiac
95 gl & 99 contour svt #1750/2760
my profile pics stuff for sale
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Joined: Mar 2004
Posts: 1,578
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Mar 2004
Posts: 1,578 |
Originally posted by hmouta:
it cuts out really really low frequencies that can be harmful to the sub.
Nuf said
Alex
00 T-Red/Tan SVTC
#1964/2150
167 HP @6800
153 TQ @3000
Sold-
98 'Tour SE 24V 5-spd
149 HP @5900
148 LB FT @4300
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Joined: Apr 2005
Posts: 59
CEG\'er
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CEG\'er
Joined: Apr 2005
Posts: 59 |
That sums it up.
My amp had a built in one...if you have one, use it cause it doesn't make sense to have your sub making sounds that low cause you can't hear them anyway and even if it is a 15' sub and can probably handle very low frequencies, it'll be easier on it.
...is this correct? Just my .02 from limited knowledge...
98 Black Contour SVT
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Joined: Aug 2001
Posts: 4,639
Hard-core CEG'er
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Hard-core CEG'er
Joined: Aug 2001
Posts: 4,639 |
and the amp is working to put out those sub-sub frequencies that u wont hear so cut them to give the amp a break or allow it to focus better on amplifying what u can hear.
Hugo AIM:omegazodiac
95 gl & 99 contour svt #1750/2760
my profile pics stuff for sale
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Joined: Mar 2005
Posts: 24
New CEG\'er
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New CEG\'er
Joined: Mar 2005
Posts: 24 |
When a subsonic filter is used it eleminates something called "flutter". This can cause damage to your woofer. "Flutter" can cause severe excursion in your woofer, this could allow the driver to bottom out. Not a good thing. Hope this helps.
96 GL
HU:Alpine
Mids:Infinity 6x8
Subs:2 Soundstream Exact 12",Vented Tuned to 30hz
Amps:Hifonics z440, Brutus BX1605D
98.5 SVT #5035 of 6535
HU:Eclipse CD5484
Mids:eD 6500
Subs:pair of eD 13Ov.2
Amps:eD Nine.1, Nine.4
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Joined: Sep 2000
Posts: 4,789
I feel Guilty, Oh so guilty
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I feel Guilty, Oh so guilty
Joined: Sep 2000
Posts: 4,789 |
Never heard the term flutter used in this context but a subsonic filter is made to avoid having subwoofers unload below tuning in a ported enclosure. They are generally unnecessary with a sealed enclosure.
"If you are flammable and have legs, you are never blocking a fire exit"
-Mitch Hedberg
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