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View Full Version : Calling AQ experts. Does this look ok? Tuning?



95Prober
06-30-2012, 11:09 PM
Hi guys,
doing an install for two 15" HDC3s firing up, ports to the rear, in a hatchback.
I have limited space and have two 6" Aeroport which are 17" in lenth I believe.
I know Im on the smaller side with space but was wondering if this looks ok.
Also, if I use both ports side-by-side, and keep them at 17" in lenth, then what
would I be tuned at?

outer dimentions are 34x32x15 plus probably another 3/4" on top to double baffle

http://s13.postimage.org/9cdcgh1uf/image.png
http://s10.postimage.org/8a0tficm1/image.png

Feel free to crticize etc. on what I should change.
However, thats the max. amount of space I have and Id like to at least
experiemnt one time with both 15's together and see if I like it

thanks!!

Chriszle
06-30-2012, 11:16 PM
From my experience, AQ's like bigger boxes, similar to DD. It depends on what you are trying to do. Music/tones, what type of music etc...

95Prober
06-30-2012, 11:28 PM
Yeah, I know they should be in bigger boxes. Im not entering SPL or anything but Id like it to play as low and deep as possible. Rap, hip-hop, dance, the usual basshead music. I think after displacement, it leaves around a little over 6cu.ft

RAM_Designs
06-30-2012, 11:34 PM
Looks like you've got about 6.75ft^3 with a 33-34hz tuning. Not bad, but a little on the small side for those subs.

95Prober
06-30-2012, 11:51 PM
Looks like you've got about 6.75ft^3 with a 33-34hz tuning. Not bad, but a little on the small side for those subs.

Thanks for the help! So should I make the 17" aeroports shorter for tuning purposes? and what diameter bracing should I use? I seen some boxes with 1" dowel

wenn_du_weinst
07-01-2012, 12:05 AM
lol aq/dd's like small boxes, and high port. Not the other way around like every one seems to think.

95Prober
07-01-2012, 12:28 AM
lol aq/dd's like small boxes, and high port. Not the other way around like every one seems to think.

So what type of high port do you recommend in my case? Must I cut the aeroports in lenth?

wenn_du_weinst
07-01-2012, 12:36 AM
what you have now is about right considering the size restraints. To play flat you will want tuned low as they tend to play the higher notes louder other wise.

95Prober
07-01-2012, 12:53 AM
ok. So Ill leave the ports as is, 17" in lenth. But I dont want to lose extra space with too much bracing. Sould I use cross bracing with dowel rods or bottom-to-top with a single piece of 2x4 or something of that nature since the weight of two 15's is a lot ? Thx again

mlstrass
07-01-2012, 06:01 AM
lol aq/dd's like small boxes, and high port. Not the other way around like every one seems to think.

double lol. I have NEVER had success with aq/dd subs in daily set ups in small enclosures. Smallest I've ever had success with was 2 15's in 7.75^3 net in a trunk car. Didn't play low all that well and metered around a 48 legal.

OP I'd do a single 18 with that amount of room, I think you'd be MUCH happier...

95Prober
07-02-2012, 03:59 PM
double lol. I have NEVER had success with aq/dd subs in daily set ups in small enclosures. Smallest I've ever had success with was 2 15's in 7.75^3 net in a trunk car. Didn't play low all that well and metered around a 48 legal.

OP I'd do a single 18 with that amount of room, I think you'd be MUCH happier...

Hopefully your idea of not playing that low would satisfy me considering I have never heard that many systems over the years to compare against as Im sure you have. Or I could be greatly disappointed haha

Would you think running two AQ HDC3 12's in the same exact size box with the same ports give a low better down low and hit harder than two 15's given less than required space in that same box? Thanks!

mlstrass
07-03-2012, 04:31 AM
Hopefully your idea of not playing that low would satisfy me considering I have never heard that many systems over the years to compare against as Im sure you have. Or I could be greatly disappointed haha

Would you think running two AQ HDC3 12's in the same exact size box with the same ports give a low better down low and hit harder than two 15's given less than required space in that same box? Thanks!

2 12's would do well in 4.5 -5^3 net, or you could do a single 18. Tune either set up around 35Hz and you should be happy.

I run a single HDC18 in 6cubes in my daily driver, very musical and loud enough.

95Prober
07-03-2012, 08:25 AM
@ mlstrass.. so would having a box with external dimensions of 34x32x15 and using 6" precision aeroports, be too big for two HDC3 12's ?
Currently my two precision ports are 6" x 17", still uncut/uninstalled

Thanks

mlstrass
07-04-2012, 04:29 AM
@ mlstrass.. so would having a box with external dimensions of 34x32x15 and using 6" precision aeroports, be too big for two HDC3 12's ?
Currently my two precision ports are 6" x 17", still uncut/uninstalled

Thanks

how many cubic feet is that? minus subs/port displacement?

95Prober
07-04-2012, 06:23 AM
7.74cu.ft minus .40 for the two subs minus .76 for the two 6" aeroports
Because I believe a 6x17" aeroport is about .38
Not sure if it totally accurate