Sierra Ext Cab Zcon 18" Sub/Port Direction help.

[darren700 0]

Hello all.

I was hoping to get some advice from the SSA community.

I have a 2009 Sierra Ext Cab.

Currently for substage i am running a 18" Zcon and AQ2200d.

The box is 6.6cu ft. net @ 28hz. with 112sq in port area.

Sub is firing forward behind drivers seat, port is up.

The whole truck has been deadened other than the roof (not too much flex).

Pics can be seen im my build thread.

Since the pics i have added the AQ2200d and changed the tuning from 34hz to 28hz with a port extension. (the port now fires up from the top front instead of the top back)

Changing the tuning really helped with my lows but its still not quite where i want it to be volume wise.

Some songs that slammed in my Monte Carlo are just not very loud in the Sierra.

In my 98 Monte Carlo with 15" Mag and 1200watts i feel it was louder that my 18" Zcon with 2200watts in the sierra. (to my ear)

I know im comparing apples to oranges but my goal is to be at least as loud as my mag was.

The mag was metered at 145 in my monte carlo.

I am wanting to build another box to try and get louder.

I would like some suggestions on which way to fire the sub and port to try and increase output.

I was considering firing sub forward and port to passenger side, or sub up and port up. does anyone else have suggestions for silverado/sierra ext cabs?

Also, Should i try decreasing port area a bit? Aaron recommended 105 for 7cu ft. I went with 112 for 6.6 cu ft. in my box.

And lastly, There is no port noise at all and it seems like there should be more airflow than there is, i am concerned that my box may have alot of impedance rise since it doesnt seem like the sub is moving anywhere near xmax. anyway to test the box rise? I have a clamp meter and multimeter.

(And yes gains are set right, all settings doubled checked)

Any help or suggestions welcomed.

Many Thanks.

Darren

Edited December 12, 2012 by darren700

[///M5 2,833]

What does get louder mean to you? The meter may or may not reflect the subjectivity of your request.

[darren700 0]

sorry, i should have said, this is just a daily system, probably wont be metered for a long time,

primarily im just going by ear right now. my monte carlo & Mag 15" had songs where it actually hurt my ears and would vibrate my nose hairs, i have yet to experience that level of loudness in my Sierra and would like to

Edited December 12, 2012 by darren700