Member
Ok I'm designing my own box using Google Sketch up and Re Box Calculator, I'm making an box for 4-18" Fi BTLs and was wondering could I have the Tuned Frequency at 20Fb for daily use. I'm going to be using it at shows and was wondering if it would be loud. If it helps its going in an 2007 Expedition EL Firing upward. I dont want to wall it because I'm like being able to look at the rear.
IF YA SMMMEEELLLLLLL!!!!
good choice for the box design. but that may be a bit low. if it were m & this is only IMO i would go about 31. so are you going to be competing in spl?
YOUTUBE SEARCH- *BGOWDY31 or BGWDY3131(<-new)* FOR ME & MY WIFEYS DAILY SYSTEMS
MY 95 CHEVY BLAZER~~~~WIFEYS 03 FORD FOCUS SE
1 SUNDOWN ZV3 18 D2(COMING SOON)~~~1 KICKER L7 15 D4
4.76 CUBE 1 8" AEROPORT 41HZ~~~5.6 CUBE L-PORT 42-ISH-HZ
CRESCENDO BC3500 @ 1 OHM~~~KICKER ZX1000.1 @ 2 OHM
DC 220A,4-0GA RUNS,2GA BIG 3,3 DEKAS 105AH EACH~~~STOCK ALT,1-8GA RUN,STOCK YELLOW TOP
147.6-MUSIC AVG 45 SEC(PREVIOUS AMP/SUB)~~~143.8-MUSIC AVG 45 SEC
146.8-LEGAL MUSIC AVG(PREVIOUS AMP/SUB)~~~143.1-LEGAL MUSIC AVG
Member
Also I'm going to powering them with a Hifonics HFi3000D one per subwoofer, wired at 1ohm.
always low
Ok, please don't use RE box calculator for a setup of that intensity, that would be a disgrace. It's not as accurate as I'd like it to be.
Bought from: kmanian(x2), KyleBetchtold, Rio, 05_ZX636, SoCalNoob, dave_damage
Traded with: cj407, twistedchild420
Sold to: jadon087, dvldogyut, 95saturn, many box designs...
Click for High Output Enclosures Email (formerly Buck Box Designs)
I do sealed, ported, t-line (consistent width), 4th and 6th order bandpasses.
I answer any audio questions sent to my email for free.
Alpine - AT - ASE (local) - Batcap - DC - eD - Excessive Amperage - Powermaster - Rainbow
In Nashville? Me too! Pm me and come hangout!
IF YA SMMMEEELLLLLLL!!!!
i use 12volt.com... its actually very acurate... nice amp choice. ive been told they are a tad bit over rated. but not by much. but yea id still say 31
YOUTUBE SEARCH- *BGOWDY31 or BGWDY3131(<-new)* FOR ME & MY WIFEYS DAILY SYSTEMS
MY 95 CHEVY BLAZER~~~~WIFEYS 03 FORD FOCUS SE
1 SUNDOWN ZV3 18 D2(COMING SOON)~~~1 KICKER L7 15 D4
4.76 CUBE 1 8" AEROPORT 41HZ~~~5.6 CUBE L-PORT 42-ISH-HZ
CRESCENDO BC3500 @ 1 OHM~~~KICKER ZX1000.1 @ 2 OHM
DC 220A,4-0GA RUNS,2GA BIG 3,3 DEKAS 105AH EACH~~~STOCK ALT,1-8GA RUN,STOCK YELLOW TOP
147.6-MUSIC AVG 45 SEC(PREVIOUS AMP/SUB)~~~143.8-MUSIC AVG 45 SEC
146.8-LEGAL MUSIC AVG(PREVIOUS AMP/SUB)~~~143.1-LEGAL MUSIC AVG
always low
And don't tune to 20hz, lowest I would would be 26, but I would do 28-29 hz.
Bought from: kmanian(x2), KyleBetchtold, Rio, 05_ZX636, SoCalNoob, dave_damage
Traded with: cj407, twistedchild420
Sold to: jadon087, dvldogyut, 95saturn, many box designs...
Click for High Output Enclosures Email (formerly Buck Box Designs)
I do sealed, ported, t-line (consistent width), 4th and 6th order bandpasses.
I answer any audio questions sent to my email for free.
Alpine - AT - ASE (local) - Batcap - DC - eD - Excessive Amperage - Powermaster - Rainbow
In Nashville? Me too! Pm me and come hangout!
Member
Why shouldn't I tune to 20hz or use the RE calculator
SketchUp Master
The sub just isn't made for a low tuning like that. Tuning that far below the sub's fs is going to cut your box efficiency. Unless you plan on playing only stuff in the 20's, there's no need to tune that low. Keep tuning in the 30-33hz area and you'll be able to dig down to 25hz with those subs, which is plenty low for pretty much any music. Also, you're going to need more than a single layer of MDF on this thing, and ample bracing as well, something that the RE calc can't take into account for.Originally Posted by Dmurria
1,000+ designs since March 2011...
I have my PM's turned off, please email at Ryan@RAM-Designs.com
Member
Ok thanks, I'm going to tune it to 29Hz. The box is going to be 7ft3 for each sub, with an double baffle. How do you get a mirror finish with out using fiberglass
Bannned
SketchUp Master
You're going to need to at least do doubled 3/4" material on the entire box. A big, low-tuned box like that will want to tear itself apart if not built right.
1,000+ designs since March 2011...
I have my PM's turned off, please email at Ryan@RAM-Designs.com
Moderator
exactly, if you don't want to use twice the MDF you can do other types of bracing, but you need to be sure to do it right or you will wind up with a broken enclosure very quickly.
Member
28 cubes and dbl mdf and he still wants to see out the back?
Posting Permissions
 |
Bookmarks