4th order idea

[mbdblue]

Why exactly are you going to 45 the sealed chambers?

ah neo! I was gonna PM you to hear your opinion about this box...pretty much the 45s would just be for space reduction and an easier way to put the whole box together. I was gonna build it outside the car, then dis-assemble and reassemble inside the car, using the 45s to put the sides and base together.

[matt402]

u might not need that 4kw for comps.

bandpasses are usually a bit more efficient than ported boxes.

[mbdblue]

u might not need that 4kw for comps.

bandpasses are usually a bit more efficient than ported boxes.

haha I may not, but unfortunately, I get forced into a higher class because of the vehicle (my seats don't fold down so they had to come out. I usually am placed in SSNW.) So that was my motivation to build bigger and more powerful. If I gotta be put in a class with people running 10k+ I wanted to be able to keep up with them

most likely I won't have the cash for 2 more amps and batts at the beginning of the season anyway

[mbdblue]

u might not need that 4kw for comps.

bandpasses are usually a bit more efficient than ported boxes.

actually, would this be an indirect way of suggesting that they may blow on a burp with a 4th order? I would prefer not to recone after every show

[mbdblue]

reviving this thread for another question....If I did this same idea with 1 15", would the airspace (2:1 or 2.5:1) ratio change? seems like it shouldnt change all that much...also should the port area be modified?

reason I ask is cuz I miss my 15....I really do. 2 12s is just too ordinary for my size car. a 15 in a bandpass seems a little more brutal, even though the 12s would be able to do the job...Im fading more and more away from the idea of competing. Id rather put in what I want and if it does well on the meter, then so be it.

as long as it gets louder than my last build, Ill be happy

[D-train-13k]

Im looking to do one too with 2 12's i was thinking 1-1.25 sealed per and a total of 5-6 ported tuned to 36hz

36hz eh haha thats going be tuned looooooow

holy crap 36 on a 4th order? lol you wont hear anything. 40-50 hz is good

doin a 3:1 with 1 cube on the sealed side should be good

[D-train-13k]

reviving this thread for another question....If I did this same idea with 1 15", would the airspace (2:1 or 2.5:1) ratio change? seems like it shouldnt change all that much...also should the port area be modified?

reason I ask is cuz I miss my 15....I really do. 2 12s is just too ordinary for my size car. a 15 in a bandpass seems a little more brutal, even though the 12s would be able to do the job...Im fading more and more away from the idea of competing. Id rather put in what I want and if it does well on the meter, then so be it.

as long as it gets louder than my last build, Ill be happy

the two 12's would be louder. theoretically more cone= moar loud

either way youll get ALOT of flex.

[dwright27]

1.5 sealed 3.75 ported for 1 15, 2.5:1 ratio.

1.5 sealed, 3 cubes ported, 2:1 ratio

[mbdblue]

reviving this thread for another question....If I did this same idea with 1 15", would the airspace (2:1 or 2.5:1) ratio change? seems like it shouldnt change all that much...also should the port area be modified?

reason I ask is cuz I miss my 15....I really do. 2 12s is just too ordinary for my size car. a 15 in a bandpass seems a little more brutal, even though the 12s would be able to do the job...Im fading more and more away from the idea of competing. Id rather put in what I want and if it does well on the meter, then so be it.

as long as it gets louder than my last build, Ill be happy

the two 12's would be louder. theoretically more cone= moar loud

either way youll get ALOT of flex.

haha theoretically....just too usual ya know?

1.5 sealed 3.75 ported for 1 15, 2.5:1 ratio.

1.5 sealed, 3 cubes ported, 2:1 ratio

sounds good man! would 45-60 sq in. still be good for port area?

[D-train-13k]

reviving this thread for another question....If I did this same idea with 1 15", would the airspace (2:1 or 2.5:1) ratio change? seems like it shouldnt change all that much...also should the port area be modified?

reason I ask is cuz I miss my 15....I really do. 2 12s is just too ordinary for my size car. a 15 in a bandpass seems a little more brutal, even though the 12s would be able to do the job...Im fading more and more away from the idea of competing. Id rather put in what I want and if it does well on the meter, then so be it.

as long as it gets louder than my last build, Ill be happy

the two 12's would be louder. theoretically more cone= moar loud

either way youll get ALOT of flex.

haha theoretically....just too usual ya know?

1.5 sealed 3.75 ported for 1 15, 2.5:1 ratio.

1.5 sealed, 3 cubes ported, 2:1 ratio

sounds good man! would 45-60 sq in. still be good for port area?

haha yeah i feel ya. port area will depend on what sub you actually use. but i think thats a good ball park.

youll have to do some fine tuning to figure out your preference. so start big and go from there