box design help

[tburt915]

Box will be for two 12in fi ssds to run from a sundown saz1500d on 1 ohm. max dimensions are 30w 16.5h and 24d. I have made 2 designs but im not sure if they are worth a shit.

Box 1: 30x16.25x23 tuned to 33 hz

4.426 cubes with 55 sq in of port.

Planning on putting the port in the middle between the subs.

port is 3.75x14.75 and 18in long

Box 2: 30x16.25x24 tuned to 32 hz

4.37cubes with 59 sq in of port

planning on subs facing the cabin and port firing to one side

port is 4x14.75 and 22in long

can anybody tell me the pros and cons of these two designs?

Or if anybody has something better in mind?

My main goal is sql and the car is a 2007 honda accord ex-l

[Joe X]

Fire forward and seal off is the better bet.

[JamieHoward]

I am also a fan of forward sealed. Hate trunk still rattling after 10 tons of deadener.

[tburt915]

The first box would work for the sealed off but with the subs being 12.5 in in diameter the subs would be barely fit on the front of the box. Would that be ok? since toe box can only be 30 in then the subs be 25in then the port almost 4 that would leave me with 1 in left.

[john253a]

I see centre port is the first 1

And 3 common wall is 2nd

I do 3 common wall

At 30-35hz up To 5net or as close as you can get to it as 750 a sub is where you want to be for 2.5net each

Also try to get the port area 60-65sq"

[tburt915]

when i got my amp tested it said it was putting out around 1900 rms so each sub would get almost full power. 5 cubes might be too big as those were just about my max diminsions. and john253a did you say you reccommend the second design over the first?

[john253a]

i prefer 3 common wall ported boxes

if 1 amp or strapped amps are used

and a 2 common wall (centre port) where separate amps are used

unless your sealing off trunk and want port aiming a ski hole

[Joe X]

The first box would work for the sealed off but with the subs being 12.5 in in diameter the subs would be barely fit on the front of the box. Would that be ok? since toe box can only be 30 in then the subs be 25in then the port almost 4 that would leave me with 1 in left.

As you say you have 5" to play with which is more than enough, the cutout for the subs is well below 12.5" so no issues.

Bear in mind how much power you will be using to determine your box specs, your port area seems rather low.

[tburt915]

I purchased box plans from dave the box guy so hopefully he can design me a good box with in my max dimensions which are 30w 16.5h and 25d

[thefourth]

Another classic ask for help and ignore it? Lol