port to big

[bopo668 10+ year member]

all right i will try that in the morrning hope fully thats the problem.i just cant stand how my cheap 12s gets louder.

 

[tooloud4tv 10+ year member]

port area has a lot to do with out put. trust me bigger port isnt always better. esp for streeT BASS

 

[bopo668 10+ year member]

yeah i know that why i posted. wondering if my port was to big because it seemed not to move much air through it

 

[BJ The Man 10+ year member]

your port is on the big side but not too big. make sure you dont have any leaks in the box o around the sub too while your fixing the other stuff

 

[IgnoreMe 5,000+ posts]

Port area is NOT your problem at all. Decrease your subsonic filter by a lot. You don't need it set anywhere near 30hz. Set it more towards 17-22hz or even lower and see if that helps. Also, increase your low pass filter or disable it and see if that helps. There could also be a problem with your wiring as well.

you really need to stick this with this ^^^^

im willing to bet its a filter setting. i ran into the same issue with my first system about 5 years or so back.

lpf was set way to low, but i didnt notice it. i drove around and as like "wow, thats not loud at all. i spent all this cash for this?" had a friend come over, we messed around with the amp, adjusted some filter settings (mainly the LPF), and the change in output was huge.

btw: 61^2 of port is 110% absolutely fine. hell i usually aim for 70^2 per 15 (since most of my subs are higher excursion drivers)

 

[bopo668 10+ year member]

yeah i turned my low pass filter up and my subsonic down to about 20 made a little differents but i guess i just had to much expectation for it.the wiring what do you mean like iv got a good grounding sanded the body then droped a screw in it. i know its getting 12.5 to the amp but i have a 1.5 volt drop on the ground could that be it.thx for everones help

 

[IgnoreMe 5,000+ posts]

yeah i turned my low pass filter up and my subsonic down to about 20 made a little differents but i guess i just had to much expectation for it.the wiring what do you mean like iv got a good grounding sanded the body then droped a screw in it. i know its getting 12.5 to the amp but i have a 1.5 volt drop on the ground could that be it.thx for everones help

your reading voltage on the ground side?

if your reading voltage on the ground side, youve got a bad ground.

 

[shavenblazer 10+ year member]

What modle blazer??

 

[Immacomputer 10+ year member]

By wiring, I'm talking about the sub, not the amp.

 

[Lingerfelt 10+ year member]

Not that I should be giving any advice because I know nothing but...

When I was dissappointed with my 2 12" R's on my Hifonics BXi2006D, I read (I believe one of George's posts actually) that playing with the Phase knob might help.

Moved it up about a quarter of a turn, VAST improvement.

My apologies if my post is idiotic, hope you figure it out.

 

[bopo668 10+ year member]

its the 1996 2 door ls. the subs are wired at 2 ohms.and i grounded the to the body so my only other bet for a better grounding is strait to the bat but i dont have unuf to get the wire yet

 

[the727kid 10+ year member]

Why in the world would you set your subsonic to 22 or 17? I always go ~5-7 hz under tuning and never ran into an issue in output even on the low-low end.

 

[IgnoreMe 5,000+ posts]

so let me get this straight though. when you have your dmm set to DCV and have 1 probe on the ground point on the chassis, and 1 point on the ground terminal on the amp, your dmm is reading 1.5v?

this is quite important...as your voltage is suppose to be 0 (or close to, .1 or .2 is ok) after the load. the load being your amplifer. if youve got voltage after it, youve got a problem.

 

[bopo668 10+ year member]

yeah if i rem right it was 4 volt on the seat latches so i moved it to the body then how can i get a better ground

 

[IgnoreMe 5,000+ posts]

yeah if i rem right it was 4 volt on the seat latches so i moved it to the body then how can i get a better ground

you got a camera? anyway you can show me how your testing for voltage?

also, i would suggest you run a full run of wire up to the negitive terminal of the batt for a dedicated ground, as the chassis doesnt seem to want to play fair.