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<blockquote data-quote="tj1320" data-source="post: 4359971" data-attributes="member: 575260">Sorry for posting this in two places but it wasn&#039;t getting any responses in the enclosure section.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&#039;t seem to find an explanation anywhere. Will they be louder with 4.4 instead of 1.5? Will they hit lower, etc?I used a QTC calculator and came up with these numbers for my Kickers:Qts = .507Vas = 5.2 (ft3)Fs Hertz = 26.3Vb (ft3) = 4.4Qtc = .7489Fc = 38.85 HertzF3 = 36.8 HertzAnd this is what I came up with for my current PG rsd12d subs and box:Qts = .55Vas = 3.39 (ft3)Fs Hertz = 22.4Vb (ft3) = 1.9Qtc = .9177Fc = 37.38 HertzF3 - 30.66 HertzI&#039;m not sure what the difference is but I do know that my PGs sound very clean with great SQ and they hit the low notes with good authority. However, they don&#039;t get very loud so that is why I bought the mammoth 15L7s. Since I&#039;ve been told that a Qtc of roughly .707 reproduces notes as they were recorded, does that mean that the L7 will sound more natural/clean in this 4.4 ft3 enclosure (Qtc .7489) than the rsd12d does in the 1.9 ft3 enclosure (Qtc .9177)?</blockquote>

[QUOTE="tj1320, post: 4359971, member: 575260"] Sorry for posting this in two places but it wasn't getting any responses in the enclosure section. 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 an explanation anywhere. Will they be louder with 4.4 instead of 1.5? Will they hit lower, etc? I used a QTC calculator and came up with these numbers for my Kickers: Qts = .507 Vas = 5.2 (ft3) Fs Hertz = 26.3 Vb (ft3) = 4.4 Qtc = .7489 Fc = 38.85 Hertz F3 = 36.8 Hertz And this is what I came up with for my current PG rsd12d subs and box: Qts = .55 Vas = 3.39 (ft3) Fs Hertz = 22.4 Vb (ft3) = 1.9 Qtc = .9177 Fc = 37.38 Hertz F3 - 30.66 Hertz I'm not sure what the difference is but I do know that my PGs sound very clean with great SQ and they hit the low notes with good authority. However, they don't get very loud so that is why I bought the mammoth 15L7s. Since I've been told that a Qtc of roughly .707 reproduces notes as they were recorded, does that mean that the L7 will sound more natural/clean in this 4.4 ft3 enclosure (Qtc .7489) than the rsd12d does in the 1.9 ft3 enclosure (Qtc .9177)? [/QUOTE]

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