To port or not to port?


Silver Member
Username: Goatin


Post Number: 257
Registered: Jan-06
I just got a couple 12"cvr's do they sound better ported or sealed?

Bronze Member
Username: Teddy21

Ann Arbor, MI USA

Post Number: 19
Registered: Feb-06

Platinum Member
Username: Glasswolf

Wisteria, Lane USA

Post Number: 11055
Registered: Dec-03
Qts < 0.30 - ported
Qts = 0.30 - 0.50, use ported or sealed.
Qts > 0.50 sealed

Silver Member
Username: Goatin


Post Number: 258
Registered: Jan-06
GlassWolfe you know you shiz I know..
but could you tell me what all that means?

Gold Member
Username: B101

Queen City, NC USA

Post Number: 1025
Registered: Sep-05
* Impedance - 4ohms
* Cone Material - Poly mineral
* Surround Material -Santoprene rubber
* Sealed Box Volume -1 - 4.6
* Ported Box inner volume -1.75 - 2.20
* Dual Voice Coil - 4 ohms each
* Sensitivity - 86.4dB
* Frequency Response - 25 - 0.5k Hz
* RMS Power Range - 50-400
* Peak Power Handling - 800
* Top Mount Depth - 5 13/16
* Bottom Mount Depth - 6 9/16
* Cutout Diameter or Length - 11 1/8
* Vas - 92.82
* Fs - 26.8
* Qts - 0.561
* Xmax (millimeters) 11.5

QTS is the subwoofers response time. Its the actual measure of the drivers free air resonance.
Your qts is .561 but they recomend those subs for both sealed or ported. =D

If i can remember correct, my qts on my 15s are like .31

Silver Member
Username: Goatin


Post Number: 260
Registered: Jan-06
so I can get good sq out of sealed and good spl out of a ported box with them right?

Bronze Member
Username: Scott_debaker

Pittsburgh, P.A. U.S.A.

Post Number: 66
Registered: Feb-06
my friend had 2 kicker cvr 15s in a seald box an we tolk them out an i made him a ported box an its sounds way better ported @ 32hz port tune

Silver Member
Username: Goatin


Post Number: 261
Registered: Jan-06
I have heard that the SQ is as good an alpine R if it is in a sealed box.
I am getting 4 of these 12"s and 2 amps
I was thinking about porting 2 and sealing 2 for my lows and everythig else.
How do you all think that would sound?
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