View Full Version : Simple Question

04-24-2008, 02:56 PM
I have 2 15L7 D4s and I will be putting them in a sealed box.

Kicker lists the enclosure volume for the 15 as follows:

Min 1.5 cuft.
Max 6 cuft.

My box will give them 4.4 cuft. per sub.

What sound/performance difference will there be with 4.4 compared to 1.5 and 6? I can't seem to find this info anywhere. Will they be louder with 4.4 instead of 1.5? Will they hit lower, etc?

04-24-2008, 05:24 PM

04-24-2008, 05:26 PM
IDK much about L7s but I do know that they aren't the best in sealed boxes.

04-24-2008, 06:54 PM
Well here is what I got from a QTC calculator. I'm not sure what it all means but maybe you guys will be able to tell me.

Qts = .507
Vas = 5.2 (ft3)
Fs Hertz = 26.3
Vb (ft3) = 4.4
Qtc = .7489
Fc = 38.85 Hertz
F3 = 36.8 Hertz

Does that mean that the box/sub will perform the best at around 37 Hz? LOL this stuff is confusing to me.

04-25-2008, 02:04 PM
Here is what I have in my current setup with my PG rsd12d subs. Maybe I need to move this to the subwoofer section to get a little more traffic. This section is SLOW.

Qts = .55
Vas = 3.39 ft3
Fs = 22.4 Hz
Vb = 1.9 ft3
Qtc = .9177
Fc = 37.38 Hz
F3 - 30.66 Hz

04-25-2008, 05:29 PM
F3=recommended tuning frequency, but since you are going sealed it doesn't apply to you.