DJ SprinklesNJO

ive thought up of another system since wireing 6 subs would be difficult, with only one amp, so ive got a design for 4 subs. my question is.... air space for each sub is .5 - 1.5 cubic feet of air. which is better, to make the box on the smaller side of that air space or maximize full 1.5 cubic feet of air per sub. im very forgetfull and dont remember what i learned about this topic.
also is there much difference if a box is perfectly sqaure or if it is very odd shaped. oh yea, this would be a sealed box thanks.

fierce gs

avoid perfect squares..basically, the more odd the shape, the better.. as far as the volume..are you sure the specs say .5 - 1.5? ive never seen that much of a span before..what subs are u using?

DJ SprinklesNJO

thanks, bc my box is not all sqaure/. yea i thought the same thing such a big difference in air space. it is an audiobahn AW1200X the 2000 model i believe, its not the one with the flames on it. and it has a chrome ring around the basket. the left column is my old 12''s that i have (#3 of them). right column is the AW1200X (i want #4 of them)
Fs 30 33.6 Hz
Qts 0.46 0.48
Qes .51 0.53
Qms 4.66 5.2
Vas 86 50 Liters
Vas 3.0 Cu.Ft. 1.7 Cu. Ft.
Re 3.15 ohms 3.2 ohms
Le .86 mH 1.13 mH
Xmax +/- 7 mm +/- 12 mm
Pmax 400 Watts 700 Watts
EBP 59 63
Freq. Resp. 24Hz-1kHz 20Hz-500Hz
Efficiency 92.1 dB 92.7 dB
Dimensions
Depth 5 1/4" 5 5/8"
Hole 10 7/8" 11 1/8"
Diameter 12 1/2" 12 3/4"
Displacement 0.15 Cu. Ft. 0.18 Cu.Ft.

All Boxes include Air displacement for Speaker and or Port(s)

Sealed An EBP of less then 45 is SUGGESTED for only a sealed box and 65 for a ported box

Minimum 0.5 0.5
Maximum 1 1.5
SPL 88.5 dB 87.5 dB

ok thats what the company sent to me. also what does all these numbers mean, i understanbd some but not all. and what does an EBP mean of 45?
and one other thing, how do the right column speaker match up to the left colum. are the right ones much better?

DJ SprinklesNJO

ahhh sorry about that guys the columns didnt come out well the numbers are still there posted. jsut really close together, sorry

BabaBooey

I threw the specs into WINISD, it reaches a Qtc of .71 in a box 1.5ft^3 large. Make them as big as you can. You can make them square, it doesn't matter.

DJ SprinklesNJO

babooey, please translate into english, thanks

BabaBooey

A Qtc of .707 is going to give you what is considered the best frequency response possible. You get the plenty of lowend base with the lowest F3 point (where your output drops to -3). If you get a significantly larger box, you will gain some efficiency and some output on the extreme lowend (subsonic area) but your F3 point will rise. If you lower the box size, you will lose efficiency but gain some output in areas where you don't necessarily want it(midbass area). You will also lose lowend bass and raise your F3 point. A lot of people confuse a high Qtc/undersized box with better sound quality because they have their subwoofers crossed over too high and notice better output in areas where a good pair of 6.5's should be concentrating on.

DJ SprinklesNJO

ok cool thanks, now i jsut have to wait for the sumer to build the box, and also to see what new truck i lease. 2002 rx is the same, i might go wit the infnity. qx4, or something else, anyone got any ideas for the same price range. ok so back to the box, now im thinking i might want to put 4 15''s in there. and have two mounted upside down so u can see the magnets. i want a show setup,