bigshane90

Make expanding foam your friend before you lay the ss. Foam between the trunk lid bracing and the sheet metal then lay the ss over that. Drop to one ohm and watch your volts if that doesn't work a new box design is a must sub up are ok but sub forward is where sound pressure is found

That's what I thought but some guys claim the aeros are more efficient than slots so I wouldn't need more...? Am I going to get more gain doing say 5cubes at 40hrtz straped as oposed to 7cubes with more port area off of one amp? What I am wanting to do is at least 148 to 149 on music. So far I've done 146 flat in the 7cube box with two aeros? What do I need to do to reach this?

U have 3 dif options the slot forward as u said. The slot facing up. Or some 6in aeros in each side firing to the sides.

and as for sub up port up since im using external aeros i cant face ports up or i will break window line... but if i have been reading forums and it seems people have lots of success firing subs foward ports up. so if either one of these will give me gains than it is possible to do but i will have to do internal aeros.

thanks for the replys! as for port area both boxes had two 6in external aeros. i thought the 7cube was probly losing numbers do to the fact it was shy 1 or two aeros. and thanks for the direction advice but i am competing in meca ameture class so i cannot have sub passenger side port drivers side. i also need to say i own two aq 3500d so i can strap... and i own an aq hdc3 that was just reconed to the copper with the new spiders they came out with. I also own a dc lvl4 xl. and have acces to test a dd 3518 and a btl 3 slug.

so i am new to smd but not to car audio. The prob. i am having is obviously i need more db. my current setup is in a 95 f150 ext cab. one aq 3500d and one 18. the box is an external aero port box. sub up, port passenger side. i have used to diferent sized boxes with almost no diference at all. First up was a 4.1 cube tuned to 40hrtz. it did a 146.8 at the headrest at 49hrtz. second i built a big 7 cube box tuned to 40hrtz, it did a 147.0 at 47hrtz. so my question is why is there hardly any diference in spl with such a huge box difference. am i missing something? is this sub and port placement not gettin the most outa my truck?