Box for 2 DP 21s

28Hz tuning is pointless to be honest... I am pretty sure he will want it loud what with the drivers he has... Tuning much below 40 Hz in any automotive application is really kind of crazy. If i had some T?S parameters for those drivers i might just play with them in a few programs.....

 

i thought the lower the tune the better the SQ, and the higher the louder?

my last box was tuned at or around 28~30, and it had a low note that you could feel. it sounded pretty good with most all of my music.

 

I'm with pedro on this one,I've had the same subs in 4 different enclosures and I tuned lower each time.The lower I tuned the better it sounded.I havn't tuned below 32hz though.

 

I understand your guys points... A box will sound good in the mobile enviorment with a low tuning...but to be real about this, it dont make much sense...to tune a box at the lowest octave of human hearing is not the best thing to do. As has been mentioned in many threads by me and others, virtually all music does not go below 35 Hz....give or take.

If the guy wants it loud and low...go with a 35 or 40 Hz tuning... TRUST ME...it will rock!

let the box work in favor of low and loud..and let the transfer function of the vehicle enhance it..... A low tuning only enhances the sub harmonic crap from a turntable LOL!


Seriously...I can only say so much....I have been in this field longer than most have been alive! LOL!!!!!! Ya it sucks gettin old...but you do retain a few things that matter...and sound is one I have not forgotten...


The gain of the mid and upper sub bass frequencies is where we want the most output...

the gain below 35 Hz...its a waste. I would not even do a home audio sub tuned that low....


OK...I am done...LOL! I hope ranger gets in here and backs ne up at least a lil bit! LOL!

 

I have to agree with Viking on this. My setup sounded good tuned at 31Hz, but it sounds so much better, louder, and deeper at 42Hz. Mine's in a small hatchback and since this is for a Tahoe, maybe it's the right way to go.To each his own. I'm certainly not an expert on such things.

 

Just cut the ports a little shorter.....he wont know the difference....then when it rocks out and rips his face off with low bass......tell him its tuned at 40Hz!!!! LOL!

 

i've had a fewer higher tuned boxes from 38-42hz and i had one box that was tuned to 32-33hz...i'd have to say the lower tuned one was by far the loudest, best sounding one i've had to date. i wish i didnt throw it away

 

It must be cabin gain thats making up the difference for me cause the single 15" I'm running now hits way harder and cleaner than any other setup I've had.I'm only feeding this sub 440 watts rms,but the sensitivity is 96 1w/1m.

By the way Ranger,your design looks good to me.I like it!

 

my guess is that anyone adding 2 21 inch subs isnt listening to reg music. if its slowed down stuff the lower tune will make for a nasty low end monster.

like i said before. my last box killed the low notes on my demo stuff, and sounded great to awsome with the rest of my music. i wasn't going for loud numbers just a great sounding enclosure.

now i just need to redo a box for 1 12 that comes close to my last box in sound and i'll be good.

 

Liftedranger08, keep posting those pics. I love to see good work

We always do what the customer wants, thats our job.

I do believe thats right, but thats because the relative gain drops. As we tune lower, the response becomes flat. However, the F3 point will remain nearly the same regardless of tuning. A box tuned at 40Hz and the same box tuned at 30Hz have the same ability to produce a 25Hz frequency.

If we need to lower the F3 point, we need to increase the size of the box.

 

looks good..... and heavy!!

 

Jared you do some dam good work man. We havent talked in a while. Ill get on fb now haha