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tapout383
07-05-2008, 02:34 AM
So what are my opitions on this woofer...i was thinking maybe a 6 cube box if i can fit it...tuned to 38 hz....ill be running it off two AQ 2200d....would 6 cubes work?

tapout383
07-05-2008, 02:49 AM
ok so i did some reseaching if i tuned it to 37.041012069068 would that be good for the hdc 18?? and also i acn only get 5.776 cubes to work with someone want to help me a little bit?

Earthman
07-05-2008, 02:49 AM
yes, but not the best at producing lows

Earthman
07-05-2008, 02:51 AM
I have 5.75 net internal for my 18''Q in a sealed box and it smashes the lows

IgnoreMe
07-05-2008, 02:52 AM
i dont know if this will apply to the hdc 18 but i know the difference from 5.5 cubes to 7.5 cubes and 3hz lower tuning was pretty **** crazy for both lows and highs on a 18" bl. i wouldnt put 18's in anything smaller than 7 cubes just from that experience alone.

RAM_Designs
07-05-2008, 02:55 AM
i dont know if this will apply to the hdc 18 but i know the difference from 5.5 cubes to 7.5 cubes and 3hz lower tuning was pretty **** crazy for both lows and highs on a 18" bl. i wouldnt put 18's in anything smaller than 7 cubes just from that experience alone.

Depends on what subs you're using, what they work best in, and what you're wanting out of them...

tapout383
07-05-2008, 02:56 AM
well 7.5 is a little big HUGE for a punny little cavalier unless i wall it :(

tapout383
07-05-2008, 02:57 AM
ill be using the HDC 18 and im just looking for good from both worlds but i will be doing some competing locally

Skip01
07-05-2008, 02:58 AM
Try it at 6 than, AQs like smaller than normal subs.....than you can tune lower with that and make up to get better controlled lows

I had my 12 HDC in 2.5 and around 40hz, it smashed the lows but box was too big and it didnt like the power i had for it hehe

Good luck

IgnoreMe
07-05-2008, 02:59 AM
Depends on what subs you're using, what they work best in, and what you're wanting out of them...

what more could you want out of them? i said i have great lows and highs? isnt that what people want?

yes it depends on the subs. but much like most 15's which ive found that like 4 cubes, im sure most other 18's will reactly similarily.

IgnoreMe
07-05-2008, 03:03 AM
people also claim the hdc can smash the lows at a 40hz tuning and 4 cubes...my 15" sure as hell didnt. it isnt a miracle woofer, its just another woofer we've found on ca.com with small different properities but still fitting within a certain range for each size

tapout383
07-05-2008, 03:05 AM
well since im going to attempt to build the box myself i guess as long as 6 cubes wont choke the **** out of it ill see what it does where should i tune it at the way i got the diagram now its going to be tuned at 36.3313440735503

RAM_Designs
07-05-2008, 03:07 AM
yes it depends on the subs. but much like most 15's which ive found that like 4 cubes, im sure most other 18's will reactly similarily.

Just depends on the subs...for example, my 15" TC-3k HATED the 4ft^3 box I was using. Had pretty noticable group delay and good response above 50-55hz was really lacking(not to mention just bad transient response in general).

Dropped the box size down to 3ft^3 and there was a huge difference.



Another example is how the MJ-18's work great in 4.5ft^3 tuned in the low 30's.

IgnoreMe
07-05-2008, 03:12 AM
Just depends on the subs...for example, my 15" TC-3k HATED the 4ft^3 box I was using. Had pretty noticable group delay and good response above 50-55hz was really lacking(not to mention just bad transient response in general).

Dropped the box size down to 3ft^3 and there was a huge difference.



Another example is how the MJ-18's work great in 4.5ft^3 tuned in the low 30's.

ha, i knew i should of put that one down. i was thining about all the tc woofers. yes there are some subs that are truly unique, but i havnet used them. IME, 15's get about 3.75 to 4.25 and 18's get 7-8 (with the woofers ive used...which are almost all internet woofer based companies). seems to be a good mix.

RAM_Designs
07-05-2008, 03:16 AM
ha, i knew i should of put that one down. i was thining about all the tc woofers. yes there are some subs that are truly unique, but i havnet used them. IME, 15's get about 3.75 to 4.25 and 18's get 7-8. seems to be a good mix.

Yeah, it's definitely not a bad rule of thumb. It really just comes down to noticing little things that the average person wouldn't notice(like the group delay and lack of transient response with the TC), and if you really feel like making a new box to fix it.

IgnoreMe
07-05-2008, 03:18 AM
Yeah, it's definitely not a bad rule of thumb. It really just comes down to noticing little things that the average person wouldn't notice(like the group delay and lack of transient response with the TC), and if you really feel like making a new box to fix it.

which is the issue. i should of mentioned ive almost strictly used spl-ish style subs (save the 1st and 2nd gen mags ive had).

im a little inebriated (sp?), so exuse any awkward stuff i say tonight :crap:

tapout383
07-05-2008, 03:19 AM
well the user BuddyCrist or whoever said his was in a 5.75 tuned to 38 htz and said his got loud.... as long as it gets louder than my dd 9515 at 4.5 tuned to 40hz thats all im worried bout

IgnoreMe
07-05-2008, 03:48 AM
well the user BuddyCrist or whoever said his was in a 5.75 tuned to 38 htz and said his got loud.... as long as it gets louder than my dd 9515 at 4.5 tuned to 40hz thats all im worried bout

ive heard people on termpro saying they're scored higher with 9515's as well as others who go the other direction. probably wont be a noticible difference to the ear assuming same power.

duece212
07-05-2008, 04:01 AM
well the user BuddyCrist or whoever said his was in a 5.75 tuned to 38 htz and said his got loud.... as long as it gets louder than my dd 9515 at 4.5 tuned to 40hz thats all im worried bout

That was me :D

hdc318, aq2200, 5.75 at 38. I dug it, sub wasn't broke in but still got loud and decently low. I'm sure after the suspension broke in some it'd be even better. I'm not a fan of retarded lows though, I listen to mostly rock and a little rap.

str8_up
07-05-2008, 11:26 AM
6 cubic feet tuned to 30 hz, 99.75" of port area
http://i31.photobucket.com/albums/c387/ndstrctbl/AQ18hdc3box.png

front: 31.25" x 14.25"
Left: 26.5" x 14.25"
right: 28" x 14.25"
back: 41" x 14.25"
bottom: 28" x 41.75"
top: 28" x 41.75"
port length one: 17.5" x 14.25"
port length two: 14" x 14.25"
port angle piece: 9-7/8" x 14.25"
the other angle pieces: 4-5/16" x 14.25"

thats my box
for my 88 benz :-P

EDIT: it's for a 18" HDC3

JEXTEL
07-06-2008, 12:55 AM
6 cubic feet tuned to 30 hz, 99.75" of port area
picture

front: 31.25" x 14.25"
Left: 26.5" x 14.25"
right: 28" x 14.25"
back: 41" x 14.25"
bottom: 28" x 41.75"
top: 28" x 41.75"
port length one: 17.5" x 14.25"
port length two: 14" x 14.25"
port angle piece: 9-7/8" x 14.25"
the other angle pieces: 4-5/16" x 14.25"

thats my box
for my 88 benz :-P

EDIT: it's for a 18" HDC3

I wonder how the lows sound in that box! my old box slammed the lows tunedto 35hz and now that im at 40hz its louder at different freqs and still get low but not as low as it use to..( im in spl for the summer i dont care ill build a box tuned to 32hz for the winter..lol)

str8_up
07-06-2008, 05:56 PM
i have to wait about 3 days to order a 18" then shipping :-P
i have been waiting for awhile now but its all good.
box built, amp shipped, and money on hand for the sub


I CAN"T WAIT