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Everything posted by 727Designs
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Box Help (Build Stopped Til I Get Confirmation)
727Designs replied to Lbox88's topic in Subwoofers / Enclosures
With an aero port as long as your over 8 in^2 per cube your fine. Slot's need 14-16 in^2 per cube. -
Box Help (Build Stopped Til I Get Confirmation)
727Designs replied to Lbox88's topic in Subwoofers / Enclosures
With a PVC or Aero port 8" or bigger is fine. The L port is not enough port area. Is that net or gross on the airspace? -
Wanting to build my own box and need a little help
727Designs replied to EvanSpurlock's topic in Subwoofers / Enclosures
MDF or Birch, Titebond II, 1 5/8 course drywall screws, jasper jig and router or jig saw, drill with bit small enough to predrill and a countersink, table saw or circular saw + straight edge, and something to seal it with I use DAP Clear Silicone, clamps help tremendously as well, especially corner clamps! -
Any potential problems for this enclosure?
727Designs replied to Shigshwa's topic in Subwoofers / Enclosures
Hmm, what would your recommendation be? I'm not a big aero fan, but a partly external slot would be my choice. Aeros work well though. -
Any potential problems for this enclosure?
727Designs replied to Shigshwa's topic in Subwoofers / Enclosures
Sub up port back works very well in a trunk from my experience. On a meter you'll notice a bigger different sub forward, port forward and sealed off completely. -
Any potential problems for this enclosure?
727Designs replied to Shigshwa's topic in Subwoofers / Enclosures
1.2" Dowels for bracing. You need to realize that bracing will take up space in the box therefore raising your tuning. I'd run a double baffle setup, with some 1.2" dowels from top to bottom and front to back. Also, any reason you are set on an aero port? 2 7" aeros wouldn't personally be my setup of choice. -
Sounds like your phases are wired backwards, although that box also looks tiny which hurts output.
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Box Help (Build Stopped Til I Get Confirmation)
727Designs replied to Lbox88's topic in Subwoofers / Enclosures
You sacrifice any more port width and it will throw you short on port area. Measure the diameter of the subs when you get it back, I'm betting they are a little smaller than specs show. Plus at 16h you could always stagger them ever so slightly to make up for some of it. -
Box Help (Build Stopped Til I Get Confirmation)
727Designs replied to Lbox88's topic in Subwoofers / Enclosures
Wouldn't the port be 14.5" tall due to the .75" MDF? And wouldn't 4.75" wide be too much since I gotta fit 2 12's into the remaining space of the front plate with overall diameter of 12.76" each? Would I also need that much volume for these? I had the height at 16.5, let me fix that. Try this: 16h x 30w x 28.5d port being 14.5h x 4.75w x 26.75d put you close to the same specs as early. You need 2.3 cubes according to the chart you provided, and any narrower port will throw you short on port area. It should fit but be tight. -
Box Help (Build Stopped Til I Get Confirmation)
727Designs replied to Lbox88's topic in Subwoofers / Enclosures
Try 16h x 30w x 28.75d with a port of 4.75w x 15h x 28d. That will throw you 4.6 net 33hz with 15.5" in^2 port per cube. That's also figuring for bracing, woofer displacement, etc. -
Introduce Yourself
727Designs replied to meade916's topic in Off Topic - Random, Misc posts - the forum "Junk Drawer"
That breaks my heart I remember when I was younger my cousin always ran US Amps, then I ran them for the first few years. -
Need sone help for a friend real quick
727Designs replied to JustinWillmon's topic in Subwoofers / Enclosures
It's just obvious to me that he's wanting more than he's got, and when he upgrades subs his box will still be a weak link. I don't know about there but I know here that ProBox could bring top dollar, easily cover building a box. Then he could build it to fit whatever he wants. -
Need sone help for a friend real quick
727Designs replied to JustinWillmon's topic in Subwoofers / Enclosures
Why not do an angled face and do the front firing? I put a single L7 12" in one of those trucks that way. I think it started at the edge of the seat and only went out 2" further at the bottom. Did sub forward firing on passenger side, port firing into the door on the drivers side. On 1k RMS it was a MONSTER in that truck. -
I use 3/8" lag bolts then I use 4 nuts, I run 1 nut up the lag bolt till I have the desired amount from that nut to the end of the lag bolt, put my wire on before that nut and jam it down between the 2 nuts. After that put it through the box and jam another nut down on the outside. That leaves a stud that you can adjust the length on by using the 2 nuts inside the box, and because the wire is jammed between 2 nuts it's not going anywhere. On the outside you just put the wire on the stud, then jam it down so it's jammed between 2 nuts as well. No picture, but as visual as I can explain it.
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That's going to be an interesting fit with 3 subs with an outer diameter of 15.5" per sub. If you end up doing it using those h x w x d measurements you can use a 10.25w x 14.5h x 20d port for 34hz tuning and 15.25in^2 of port per cube. Figuring sub displacement and bracing would also put you around 9.75 net.
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sa-12s doin work
727Designs replied to BeAlLsTaR13's topic in Sundown Audio - GREAT Amps/Subs! GREAT Customer Service!
Love the build, looks like it moves hella air for sure... ...But that tag frame makes me want to vomit... so I'll just leave this right here: -
Opinions on new box for future build
727Designs replied to RooTxBeeR's topic in Subwoofers / Enclosures
1.25 each is WAYYY too small. RAM is right, 2 or so would work much better, maybe even a touch bigger with your power level.