Break in period for XXX?

[audioholic 5,000+ posts]

I have two 05 XXX's. One is still bnib, but I did use the other for a few months in a sealed box. Yes, the suspension did loosen up noticeably. But at no point did it sound... bad. The problem is the box.

 

[innsanes 10+ year member]

Yep, box is too small. Where did you come up with 3.2 cubes anyway?

Didn't have time to build a box so i picked up one locally that was made for an FI Q tune to 33hz. I know the XXX magnet will take up more volume so i stuffed 2lbs of polyfill to compensate for that. Theres nothin wrong with the SPL on this driver. Its pretty **** loud, but the SQ is boomy for my taste. I'm guessing i need to tune lower and bigger enclosure. This is coming from my 12" arc flatline @ 28 hz. Could be just my ears being used to the ARC.

 

[audioholic 5,000+ posts]

The XXX will display more linear output than the FL. 'Boominess' is more accounted for by enclosure, and system tuning. Do you have a processor that allows much adjustment for the subwoofer?

Vented systems are very sensitive to getting it right. Much less forgiving than sealed for example. Buying a too-small prefab and stuffing it with poly is not a recipe for good performance.

 

[528hz 10+ year member]

Actually, if you don't want it to be quite as boomy, I would go with a slightly smaller box or keep it the same size, and tune around 30 hz.

Bigger box usually makes for boomier sound.

I currently have my 12" XXX in a 2 cu. tuned @ 33 hz, and I think I might go slightly bigger with the box to 2.5-2.7, but keep the same tuning. I think the SQL is amazing and accurate and they feel like they can more power than everyone says. I LOVE THESE SUBS!!!!

 

[audioholic 5,000+ posts]

There is simply no way it needs a smaller box. lol

 

[innsanes 10+ year member]

smaller box creates more of a boomy effect doesn't it? The sub is hard to blend with the front stage. I heard its only good up to 63 hz could be the problem and me needing to run like 8 in mids in my doors. I might just have to build a bigger box this summer when i have time. Also audioholic how would you compare the SQ of a Mag to the XXX i have. I think i seen you post somehting about playing with either the 2 before. thanks

 

[bonesninja 5,000+ posts]

smaller box creates more of a boomy effect doesn't it? The sub is hard to blend with the front stage. I heard its only good up to 63 hz could be the problem and me needing to run like 8 in mids in my doors. I might just have to build a bigger box this summer when i have time. Also audioholic how would you compare the SQ of a Mag to the XXX i have. I think i seen you post somehting about playing with either the 2 before. thanks

i've had both, and i went back to XXX's........but the mag is a great sub, excellent sq, just not enough output for me

 

[innsanes 10+ year member]

thanks for your input, will try a new box, whats your box size and tuning freq?

 

[bonesninja 5,000+ posts]

i got 2 12"s...box will be 4.5 net tuned to 28

 

[audioholic 5,000+ posts]

Yeah must have been bones, I haven't owned a Mag.

Yes you want substantial midbass to run with that XXX. But if you have it, the system should sound amazing.

edit: I just built a box for my two xxx15's... 4 cubes tuned to 30hz for each driver. (not installed yet)

 

[bonesninja 5,000+ posts]

my mags in a big sealed box

my old XXX in 4 cube @ 28 box

 

[audioholic 5,000+ posts]

Wow those were big boxes for being sealed. lol

 

[bonesninja 5,000+ posts]

Wow those were big boxes for being sealed. lol

1 box...i had to use 2 pieces of carpet. 5 cubes net

 

[audioholic 5,000+ posts]

Guess the pic is throwing me.... looks considerably bigger than 5 cubes. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[innsanes 10+ year member]

thanks guys