View Full Version : whats the difference sq-spl?

09-17-2013, 07:39 PM
Just got my install done. Was told that my box was made wrong by a different shop. He said it is made for sq and not spl. ny question is whats the difference pro and con.

09-17-2013, 07:47 PM
Is it sealed or ported? Sealed=sq and ported=spl usually. Do you know the dimensions and tuning?

09-17-2013, 09:39 PM
info on box

09-17-2013, 09:47 PM
The difference, regardless of box type, is that a box designed for sound quality has a wider and more flat response curve while an SPL box is designed to produce huge acoustical gains within a narrow bandwidth. The trade off there is that SPL boxes roll off steep above and below tuning.

And sealed boxes can't be SPL boxes, because they do not produce any acoustical gains. That said, they're okay for sound quality except that they have to be huge in order to reach down to the sub bass region.

09-18-2013, 07:48 AM
I know its tuned to 55 box is 38x18x14 port is 8" round 14" deep

09-18-2013, 07:50 AM
The box is made for 2 12" treo ssx subs

09-18-2013, 07:54 AM
55hz seems exceptionally high for an sq box, it even seems high for an spl build.

09-18-2013, 08:49 AM
Tuned to 55hz it will **** for music you want it more in the 30-40hz

09-18-2013, 09:42 AM
With those dimensions your box is tuned to around 36

09-18-2013, 09:44 AM
Scratch that, I used those dimensions for net volume. Where yhe dimensions you provided of the outside of your box or internal?

09-18-2013, 11:29 AM
I know its tuned to 55 box is 38x18x14 port is 8" round 14" deep

If those are outside dimensions and the baffle isn't laminated, then the box is tuned at ~43.5 Hz. That's more of a burp box than a sound quality box.

If they're internal dimensions, the box is tuned at ~37.5 Hz. That's a decent tuning for a daily box, as it would reach a bit lower but also be strong where most music has bass.