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Old 04-24-2012, 10:47 PM
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Default No output from enclosure.

Okay guys. I'm trying to shoehorn my two Lanzar OPTI1535Ds into my Eagle Talon. Lanzar recommends 2.5 ft^3 tuned to 35, this seemed small to me but the suspension isn't as stiff as most drivers because they use spaced spiders, so I figured anything bigger than 2.5 cubes would be fine.

My max enclosure size in the car is 12.75" H x 32" W x 36" D. That gave me 6.39 cubes before port displacement. The subs are inverted. I figured I would use an 8" Sonotube for a port to keep box volume as high as possible.

Design 1: 6.10 ft^3 at 32 Hz

This did a 145.3 at 41-43 Hz on 1500W before rise, but there was no low end below 33 Hz. I believe the port was unloading so I decided to modify the box.

Design 2: 5.65 ft^3 at 28 Hz

Lowered tuning since I had room for a longer port. This design was pathetic. The subs unloaded HORRIBLE for some reason, even though the box is smaller, and the port barely moved any air.

Anyone have any ideas what I am doing wrong? I have designed boxes before and never had a problem, now I'm at the threshold of wanting to sell everything because these designs should work fine on paper, yet they are miserable.

Sorry for the long winded post.
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  #2  
Old 04-24-2012, 10:58 PM
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slot port on bottom of box width wize then subs directly over the port
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Old 04-24-2012, 11:04 PM
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subs wired out of phase, your welcome
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Old 04-24-2012, 11:05 PM
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Do you have any pics of the box in the car?
I had a single 15 in mine in 3.5 cubes and there wasnt much room left back there.
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Old 04-24-2012, 11:20 PM
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Quote:
Originally Posted by dcarcstms View Post
slot port on bottom of box width wize then subs directly over the port
Only have 12.75" of height available and the subs are 10" deep so that's not an option... Can only invert the subs at the front of the box because the glass is in the way.
Quote:
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subs wired out of phase, your welcome
I'll go check the phasing
Quote:
Originally Posted by talon View Post
Do you have any pics of the box in the car?
I had a single 15 in mine in 3.5 cubes and there wasnt much room left back there.
Gave up back seats too.

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Old 04-24-2012, 11:28 PM
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Put the subs way closer to the back of the box and push the box back closer to the hatch and move all the junk.
Should be louder with the subs firing off the glass rather than in the middle of the car.

Last edited by talon; 04-24-2012 at 11:31 PM.
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Old 04-24-2012, 11:29 PM
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I have had good luck with subs up port up in a hatch car.
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Old 04-24-2012, 11:34 PM
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Also what are your filter settings set at on your amp? Subs out of phase will cancel a bit for sure.
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Old 04-24-2012, 11:37 PM
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Quote:
Originally Posted by Jolly Green Giant View Post
Only have 12.75" of height available and the subs are 10" deep so that's not an option... Can only invert the subs at the front of the box because the glass is in the way.

I'll go check the phasing

Gave up back seats too.

THERES YOUR PROBLEM!!! missing a sub. jk
s'cribed
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Old 04-24-2012, 11:40 PM
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Taking the plastic piece off the back of the hatch gives you a little extra height too.
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