the 18s are rated at 1600rms its getting 2000rms its in but i have the ports facing forward so its not that great gets real loud when i open the trunk so im going to try turning it around and see what happens then

 

My bad i retract my previous statement..lol Well thats a much better power jump. I think i was thinking of the 12s. Have you thought of smaller box bigger port? Have everything facing into the cabin?

 

theres no possible way to face an 18 into the cabin a 15 into the cabin with port is posible but only 1 15 i could also do 2 12s into cabin the 4 10s i have are facing into the cabin but i think i can get more with a more efficient box im trying to sell my 10s to go with 12s or 2 15s not sure yet

 

angle your woofer and face it into the cabin SX4life had a box the style i am talking about.

 

ahh i know what you mean now if i did that i wouldent have enough air space for the sub then i dont have to much room for work with maybe 7.5 cubes total

 

Yeah, i figured that too. Ive seen them really shine at 10-11 cubes.

 

Where are you getting your info? The AP 30001D makes 1000rms @ 4ohms (14.4v), 2000 @ 2ohms and 3000@1ohm (or so the manual states). So, with box rise and voltage drop (which you don't have much of) you'd be lucky if it gets 1000rms with a single VC 4 ohm sub...

I think your still going to get better results with either 2 - 12's, a 15 or keeping 4 10's. That you can use all the amps potential. Switching to 4 ports will greatly diminish the interval volume. Look at my second post. I figured it all out for you up there.

The best compromise I found for you was 4 6" ports about 34" long. Still leaves little over 5cuft airspace and tunes to 39.25. This was assuming .125 port material thickness, if it's larger, the Vb will be even smaller.

You've heard that tuning before, if you remember what my tuning was. You said yourself, it can still get low....

 

all the web sites with the ap3001d power rating are wrong lol

2000@4 bridged
3000@2 bridged

500x2@4ohm
1000x2@2ohm
1500X1@1 ohm

its probly getting around 1500 after box rise and all

 

I learn something new everyday.

 

but.. i can run it at 1 ohm and get more power out of it hehehe

so i turned it around muchhh b etter not nearly as loud as the 10s or sound as good but it will work for a while lot more interior flex it seems like still gets pretty low as well and havent tried plugging a port hehe