Airspace for RSdC 10 sealed

IonSQL · Post by **IonSQL** » Wed Feb 20, 2008 10:44 am

Has anybody had a chance to try the RSdC 10 out sealed yet? I've got 2 coming Friday and want to build a quick box to tide me over for a while...

I was thinking of doing somewhere between .8 and 1.0cf total for the 2, and then play with polyfill a bit... any thoughts?

Power will ultimately be 800w to each sub...

Post by **stipud** » Wed Feb 20, 2008 11:19 am

If they are anything like the regular RSD 10's, they work great in 0.5-0.6cuft.

majette · Post by **majette** » Wed Feb 20, 2008 6:55 pm

i have mine in .42 running off of a jl 1000/1 and it is VERY IMPRESSIVE. tight, great sql, and very detailed on the bass notes. i also have it crossed at 50hz/24db slope

rdjorge · Post by **rdjorge** » Wed Feb 20, 2008 9:02 pm

Winisd shows a box of .588 with a qtc of .703 sealed. But shows the optimal SQ box as a ported box 1.238ft^3 tunned to 26hz. The ported box shows a flat response all the way down to 32hz.

majette · Post by **majette** » Wed Feb 20, 2008 9:40 pm

rdjorge wrote:Winisd shows a box of .588 with a qtc of .703 sealed. But shows the optimal SQ box as a ported box 1.238ft^3 tunned to 26hz. The ported box shows a flat response all the way down to 32hz.

what is the port dimension for this box?

IonSQL · Post by **IonSQL** » Thu Feb 21, 2008 6:14 am

majette wrote:i have mine in .42 running off of a jl 1000/1 and it is VERY IMPRESSIVE. tight, great sql, and very detailed on the bass notes. i also have it crossed at 50hz/24db slope

Is that .42 before or after the .09 for sub displacement?

Post by **stipud** » Thu Feb 21, 2008 7:25 am

rdjorge wrote:Winisd shows a box of .588 with a qtc of .703 sealed. But shows the optimal SQ box as a ported box 1.238ft^3 tunned to 26hz. The ported box shows a flat response all the way down to 32hz.

Keep in mind this is flat open air response... not flat in-car.

In the car you will have acoustical gain, due to the small enclosed nature of the vehicle, which adds ~12dB/oct at ~60Hz or so. Because of this, a "flat" open air response will have very loud low end in a car.

0.6cuft sealed is probably as flat in-car as you can get it.

rdjorge · Post by **rdjorge** » Thu Feb 21, 2008 11:08 am

stipud is right.

Majette, the port can be calculated here according to what size of box you want:
http://www.reaudio.com/speaker_box/LPort_Box_Calc.html
or
http://www.bcae1.com/spboxnew2.htm (my favorite)

You will probably have to go with a slot port, because the round ports are going to be too long. An example: a slot port of 1"x 4" x 11.17"long, will get the 26hz, but you will have to watch for port noise, which in this example will be audible at 38hz and below with 600wrms.