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Thread: Sub enclosure help (automotive)
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03-22-2015, 11:10 AM #1
Sub enclosure help (automotive)
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_...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/precisi...e-kit--268-3502008 Outback<-----SOLD
2009 Mobius LSV
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03-22-2015, 11:15 AM #2
sure Chp will have an opinion on this.
my only comment is glad you don't live next door to me....'06 Supra Launch 20SSV-gone but never forgotten
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03-22-2015, 11:27 AM #3
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03-22-2015, 02:20 PM #4
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
2015 Mondo
Upgraded 900lb Rears, 250lb under Port Seat & 750lb IBS
2079 Prop
Auto Flow 2.0
Kicker Stereo: 2 800.5 amps, 2 400.2 amps, 4 KM8 towers , 4 KM10 subs & 8 KM6 cabin speakers
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03-22-2015, 02:22 PM #5
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03-22-2015, 03:05 PM #6
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.
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03-23-2015, 05:52 AM #7
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'06 Supra Launch 20SSV-gone but never forgotten
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03-23-2015, 10:42 AM #8