Small Airspace Subs

[ninjawhiteboy12 10+ year member]

I am looking for some 10-12in subs that need a very small box sealed. One I have been looking at is the RD Sonance. Any ideas?

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[galacticmonkey 5,000+ posts]

Fi says the suggested Q 10 box is .2-.6 sealed. .2 is pretty **** small....

 

[ninjawhiteboy12 10+ year member]

i will check it out, any others?

 

[galacticmonkey 5,000+ posts]

I know Treo reccomends super small enclosures as well for some of their subs.

 

[ninjawhiteboy12 10+ year member]

which treos?

 

[Ray21 10+ year member]

Image Dynamics IDQs work well in small boxes also.

 

[ciaonzo 5,000+ posts]

If you're looking for a driver that is specifically designed to be used in small sealed enclosures, this will help you. Shoot for a low Fs, generous Xmax, a Qts of .5 and higher, and a small Vas figure. Once you find drivers that fit into that criteria, you can double check it's suitability with this formula to find EBP (Efficiency Bandwidth Product). Fs/Qes = EBP. You want an EBP of around 65 or lower. 50 or less will be optimal.

You can find the proper enclosure volume (in liters) to achieve a particular Qtc using this formula. Vb = Vas / (( Qtc / Qts ) ² - 1). There's about 28.3 liters in a cubic foot. To give you an idea of what to shoot for, a Qtc of around .5 is critically damped and will sound very lean and analytical. A Qtc of .7 will sound sharp and detailed. A Qts of 1 or higher will sound heavy or tubby. Hopefully that's helpful for you to reference what type of sealed setup might be appealing for your needs.

Another approach is to use any driver with a low Qts, a very high BL product (ideally around 18 T*m and higher), lots of clean stroke, along with high mechanical/thermal power handling and shoehorn it into whatever size enclosure you need. Take a measurement of the frequency response and apply heavy EQ to match/compensate for your vehicle's transfer function and your personal tastes. It's pretty much a loose variation on the Linkwitz Transform and you'll need lots of power and stroke for this approach.

 

[ninjawhiteboy12 10+ year member]

wow thanks I will look at some specs and use that information

and im sorry i said sealed only the only reason I say that is because of the space, I want the loudest and the cleanest set up for around 3.5 cubes and also try to keep it under 600 for all the subs

 

[joeybutts 10+ year member]

eD, ID, I think some FI's and Sundowns......

 

[hornedfrog1985 5,000+ posts]

IDMAX/IDQ. They both don't take much.

 

[DNick454 10+ year member]

If you use a smaller than optimum sealed enclosure, make sure it's overstuffed with polyfil. and that you have a decent amount of power on tap.

 

[ciaonzo 5,000+ posts]

If you use a smaller than optimum sealed enclosure, make sure it's overstuffed with polyfil. and that you have a decent amount of power on tap.

Polyfil is definitely a good thing but using too much will negate the effect. It should never be compressed, simply fluffed and placed. About a 1/2 pound per cubic foot is sufficient. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[SicAudio 5,000+ posts]

Ciaonzo definately knows his shit trust what he says.

 

[GiganticPrune 10+ year member]

mach 5 ixl 10. .5 sealed, .7 vented

 

[ninjawhiteboy12 10+ year member]

i could maybe fit 15's in there if they would fit the air space