Need to break 150db, need box ideas

[greggtr]

Hey guys...

Here is the deal...

I need to get into the 150's at the dash

Equipment:

2 x DD 9510

1 x DD M4 (~5K)

2 x Yellow top Optimas in the boot

This wil run a test tone

I need advise as to the optimum SPL boz size / port size and turning frequency...

Also do I build to same size boxes or one box for both subs

I built 2 x boxes according the DD's website but they look too small for max SPL

The other variable is the car...

We are sharing this project between a few of us...

Cars:

2007 Merc ML320 SUV

2007 Merc CLK63 Coupe

Mazda Mx6 Hatchback

EK Honda Civic hatchback

I think the euro cars can do well as they have excellent insulation and minimal leaks, but hatchback are

hatchback and are great for SPL...

[__d_a_v_i_d__]

With a hatch and a M4a you should be there in no time.

You have the car, the power, the motorforce, maybe not the cone area. But the right box you should be there .

I had 2 dd 9510s at 3.4 cubes tuned to 34hz doing 144s daily in a trunk car with 3k .

Goodluck

[fecupe2001]

the hatchbacks are definitely the best option here, i would do something like 2 cubic feet and a 8" aeroport if you can fit it, and i hope that amplifier is wired at .5 ohms or less, if not, is gonna get more difficult to get a 150 wired at 1 ohm

[greggtr]

Well I made the DD recommended boxes 1.5 cubic feet each... but they look too small... that said, according to you guys thay should be fine...

I cant wire them to 0.5ohms as they are Dual 4ohm so I will run them as 1ohms which is the lowest the amp is stable to...

[Dd9515 king]

Is this just for spl?

[greggtr]

Yep... one time only... burp just to win a bet that 2 x 10's can hit 150db at the dash

[Dd9515 king]

If you havent built a box yet. Try to do 1 cbft per woofer then port area like crazy. On spl you want a lot of port area. DD's love port area in the first place so they need a ton.