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skadude016
09-12-2005, 03:27 PM
if I were to tune my 12'' 187 to 28hz. and the only mid bass i have are the 6 1/2 infinity coxials. would i get enough mid bass or should i go with 33 hz?

JimJ
09-12-2005, 03:29 PM
You shouldn't depend on your subs for midbass anyway...they should be playing subbass.

I love my e12a.22 with a 27Hz ported enclosure. I would stick with the lower tuning.

skadude016
09-12-2005, 03:31 PM
well i dont have much money right now and i wanna hit as many bass hz as possible

JimJ
09-12-2005, 03:35 PM
:confused:

If you're concerned about not getting enough midbass, make sure you're sending your front stage as much unclipped power as you possibly can - if you're not externally amping those coaxials, get an amp for them!

Let your subwoofer take care of everything under 80Hz or so.

Johnny Drama
09-12-2005, 03:37 PM
well i dont have much money right now and i wanna hit as many bass hz as possible

When you say bass hz do you mean the full range or how loud? Personally I like sealed. Thats just me.

skadude016
09-12-2005, 03:39 PM
well would a sealed 12'' 187 get loud? and get low?

it will b powered either at 4ohms with 400-425watts from a viper 1200.1

or at about 7-800 watts with a viper 1200.1 at 1 ohm with the gains set low

JimJ
09-12-2005, 03:41 PM
A sealed enclosure will always beat a bass reflex enclosure for extreme low end response.

Just 'da way it is.

However, you lose that nice overall 3dB output gain that you'd get ported.

Johnny Drama
09-12-2005, 03:48 PM
A sealed enclosure will always beat a bass reflex enclosure for extreme low end response.

Just 'da way it is.

However, you lose that nice overall 3dB output gain that you'd get ported.

Yep, yep...My reason for asking him which he meant. Try sealed first, if you dont like the output make a lower tuned ported box.

skadude016
09-12-2005, 03:55 PM
well i have it in a little under a cube sealed right now with 350 watts going to it. and i jus seems... blah... like cleaner than my old woofers but just really lacking in the way of loudness. the old woofers were getting 150 watts each in sealed encolsure. what would be an ideal wattage for the 187?

I want SExxx
09-12-2005, 04:00 PM
A sealed enclosure will always beat a bass reflex enclosure for extreme low end response.

Just 'da way it is.

However, you lose that nice overall 3dB output gain that you'd get ported.


True, however, as far as normal music a low tuned vented enclosure will seem to play a lot lower since it is more "bottom heavy" and the lower notes are brought out a lot more to compensate for the normal drop off of sensitivity to your ears. ex. in a 28 hz box you ahve to get down around 20hz before the sealed box is louder then the ported box......sub 20 hz is VERY hard to even hear, unless its at a rediculous level.

Nikuk
09-12-2005, 04:02 PM
if I were to tune my 12'' 187 to 28hz. and the only mid bass i have are the 6 1/2 infinity coxials. would i get enough mid bass or should i go with 33 hz?


IMO, if You have to ask, You won't notice the difference. :blush:

I want SExxx
09-12-2005, 04:09 PM
IMO, if You have to ask, You won't notice the difference. :blush:

In what low end? or loss of higher bass. It will definately gain a lot on the low end. Probably won't lose much from the higher bass.

Nikuk
09-12-2005, 04:16 PM
Well, in summary: the orig. poster is concerned about a tuning variance of 5hz. I'm willing to bet that once the enclosure is built it'll be atleast 1 full-cycle off intended tuning.
I'm also going to say that the output of a generic 4th order ported will not be drastically changed for a 5 cycle variance, let alone the NFR, or 3db down point. Efficiency will not swing very far up the frequency band.
Furthermore, tuning most ported subbass drivers below 40-45hz in a basic helmholtz will negate whatver midbass possibilities that the driver may have had. By the time the driver response rolls off, it'll be anywhere from 3-12 db down by 80hz. At that point, Your mid's should have well 'kicked in.'
IMO, strong dedicated midbass drivers are a necessity in "good" reproduction in-car. However, I'm not a proponent of hpf'ing a sub driver nearly that high. Even high Q sealeds should be high passed at no more then the 60hz region.... assuming 12db/octave.

Just my aural opinion. That's why I said, IMO above.

SQ is subjective, output is tangible.

-Nick

skadude016
09-12-2005, 04:24 PM
ok well then IA says to go 1.4-2 cubes sealed. i will be giving it about 700 watts. what do you guys think would be the best size for it

tRiGgEr
09-12-2005, 04:26 PM
what do you guys think would be the best size for it


IA says to go 1.4-2 cubes sealed

:crazy:

JimJ
09-12-2005, 04:28 PM
ok well then IA says to go 1.4-2 cubes sealed. i will be giving it about 700 watts. what do you guys think would be the best size for it

I'd trust the manufacturer.

Mikey Likes It
09-12-2005, 04:29 PM
go with the Imcrimnator ported stuff.

PowerNaudio
09-12-2005, 04:51 PM
tuning the box from 28hz to 33hz will make a difference on how it sounds, if it will be a desirable one that's a different story. changing the tuning frequency will affect the gain level of some frequencies of the frequency responce, while changing the box size will change how wide the frequency responce is. "dont quote me on that", so they go together hand in hand, to tune the box just right,
unless you know what the outcome of the new tuning freq will be, don't do it.
so with that said, if you can get the current external dimensions of the box and the driver T/S, then get the box redesigned to sound close to what you want.

some subs have such a grate frequency responce that can cross into the mid-bass freqs and compliment the sound system better than a mid-range going in to the mid-bass freq responce will.

Mikey Likes It
09-12-2005, 04:53 PM
rofl

skadude016
09-15-2005, 09:22 AM
:crazy:

I meant from 1.4-2 cubes what do yall think would be the best size....