Sub enclosure help (automotive)

[aapwayneo2001]

I know this is not for marine audio but...I'm going to build a HUGE box for my 02 explorer and put 8 12" cheap dual SD12 subs wired to 2ohms on a planet audio AC4000.1 amp "rated" at 2K w RMS my question is... Should I just leave the box sealed or should I throw four 3" aero ports in it at about a 5" length

Box dimensions
Top plate: 40x28
Bottom plate:40x28
Left plate:26.5x13.5
Right plate:26.5x13.5
Front plate:40x13.5
Back plate:40x13.5

Amp
http://www.sonicelectronix.com/item_25313_Planet-Audio-AC4000.1D.html

Sub specs
Dual SD12
Sensitivity: 88dB
Freq. Response: 28Hz-125Hz Nominal Impedance: 4 ohms Peak Power: 500 watts
RMS: 175 watts
Voice Coil Size: 2"
Magnet Size: 38.2oz.

Aero port
http://www.parts-express.com/precision-port-3-flared-speaker-cabinet-port-tube-kit--268-350

[sandm]

sure Chp will have an opinion on this.

my only comment is glad you don't live next door to me....

[aapwayneo2001]

sure Chp will have an opinion on this.

my only comment is glad you don't live next door to me....
LOL shouldn't be that loud, I live on 60 acres so tuning it won't bother anyone. Got the subs on close out for $10 each and figured wth who wouldn't want 8 12s in their truck??

[BrettLee3232]

LOL shouldn't be that loud, I live on 60 acres so tuning it won't bother anyone. Got the subs on close out for $10 each and figured wth who wouldn't want 8 12s in their truck??

I had 8 12s in a custom box in the bed of my GMC Sierra ported to the cab. I think they were Audiobahn & matching amp. It hit so hard and rattled the shit out of bed. It got pretty annoying after a few weeks. Actually now that I think about it, I think I had 12 12s. My dumb high school years lol

[aapwayneo2001]

I had 8 12s in a custom box in the bed of my GMC Sierra ported to the cab. I think they were Audiobahn & matching amp. It hit so hard and rattled the shit out of bed. It got pretty annoying after a few weeks. Actually now that I think about it, I think I had 12 12s. My dumb high school years lol

Yeah think I'll just keep it sealed, much easier and cheaper to build

[David Analog]

With a good, high Xmax 12-inch subwoofer, a 3-inch I.D. round port is just too small. More port velocity means more noise and more compression at high output levels. So four 3-inch ports for the collective surface area of eight 12-inch subs would be a colossal mismatch. Maybe it won't even matter with a Dual subwoofer.
But I would stay sealed. You are going to benefit from cabin gain in a vehicle anyway. The optimum enclosure will be smaller and sealed is far less prone to a design error.
With eight 12-inch subs the number one issue will be the execution of the enclosure.

[sandm]

Got the subs on close out for $10 each


With a good, high Xmax 12-inch subwoofer

David,
don't think you read the whole post :)
60acres to tune on is good, but glad I dont' live next to you as you come home each day from work, or sit next to you in traffic and, although can't hear the music clear, get to listen to you rattle every loose nut and bolt off that thing.
like Brett mentioned.. dumb high school years :)

[David Analog]

David,
don't think you read the whole post :)
60acres to tune on is good, but glad I dont' live next to you as you come home each day from work, or sit next to you in traffic and, although can't hear the music clear, get to listen to you rattle every loose nut and bolt off that thing.
like Brett mentioned.. dumb high school years :)

I read it again and again and again. It still does not compute.