Somewhat disappointed...

[Viperoni 0]

Ah well, it happens.

It feels louder to me, but then again, I'm about 3 feet away from the meter, and it only said 143db...

Also the ports were aimed up instead of backwards, so that definetely has something to do with it.

In any case, the subs are out of the car... I dunno if they'll be going back in anytime soon, but maybe.

In the meantime, I'm enjoying having my handling back, the car is so much more tossable now

Also installed a pair of MLI-65's in the rear deck of my friends 99 accord 4dr, running as subs. Will make a thread on that in the future.

Quick summary: Good bass. Actually scratch that, make that pretty darn good bass.

Untouchable for $20 a pop.

Edited May 7, 2007 by Viperoni

[element 0]

How big is your port and what is it tuned to?

[Viperoni 0]

The box is 3.25cf per sub.

5.5" ID port, 10 inches long tuning to about 40hz. Burped 43, 45 and 47hz. 45hz was the loudest.

[///M5 2,833]

5.5" port for 2 18" subs?? that is way too small

[Puggsley456 0]

Wow, you have a 40hz tune and burped loudest at 45? Doesnt that seem a bit odd? isnt there usually a larger difference in the loudest burp freq? I know with my box that was tuned to 30hz my loudest freq was 49hz.

[Viperoni 0]

Sorry, 5.5" port for each sub, which is in it's own 3.25cf chamber.

I figure it could be something up with the car's transfer function.

Remember I have a completely plastic shell... it certainly does act wierd. I also had less people pushing on the doors and hatch, so that could have been a contributing factor as well. I can see my entire hatch panel vibrating when it's going off, so I have no doubt I'm leaking through it as well.

Ah well, we'll see what the future brings. So far I'm really enjoying having my handling back

[element 0]

Sorry, 5.5" port for each sub, which is in it's own 3.25cf chamber.

I figure it could be something up with the car's transfer function.

Remember I have a completely plastic shell... it certainly does act wierd. I also had less people pushing on the doors and hatch, so that could have been a contributing factor as well. I can see my entire hatch panel vibrating when it's going off, so I have no doubt I'm leaking through it as well.

Ah well, we'll see what the future brings. So far I'm really enjoying having my handling back

My saturn works alright, best I've done yet was only a 146 with a pair of 12s though. Maybe with such a small chamber for each 18, you'd be better off tuning higher.... maybe add another 5.5" port to each chamber too. It seems normal to me that loudest would be a few hz above tuning frequency - say 5-10... My box is tuned to about 58hz and is loudest at 65hz in my SC1.

Edit: Are your ports internal or external?

Edited May 8, 2007 by element

[Viperoni 0]

Sorry, 5.5" port for each sub, which is in it's own 3.25cf chamber.

I figure it could be something up with the car's transfer function.

Remember I have a completely plastic shell... it certainly does act wierd. I also had less people pushing on the doors and hatch, so that could have been a contributing factor as well. I can see my entire hatch panel vibrating when it's going off, so I have no doubt I'm leaking through it as well.

Ah well, we'll see what the future brings. So far I'm really enjoying having my handling back

My saturn works alright, best I've done yet was only a 146 with a pair of 12s though. Maybe with such a small chamber for each 18, you'd be better off tuning higher.... maybe add another 5.5" port to each chamber too. It seems normal to me that loudest would be a few hz above tuning frequency - say 5-10... My box is tuned to about 58hz and is loudest at 65hz in my SC1.

Edit: Are your ports internal or external?

Yeah, I could imagine them needing to go a bit higher. The problem is that my deck has massive problems with skipping, and if I were to tune/burp higher, I highly doubt I could get a tone out long enough to register something on the meter. I'm not serious enough into this stuff to run a deck externally....

The port is half inside and half out. I want to keep the box volume as high as possible, but without suffocating the ports along the roof of the car.

[Ga foo 88 0]

I think its some what obvious to either seal up this box or start completely over. If you don't have the airspace, then two 15s in their reccomended box will be louder than two 18s crammed in a small box that lacks port area.

Maybe the best solution if you have time, is to make a couple boxes for one of the Mjs and test out different port lengths and box volumes.

[Viperoni 0]

I think its some what obvious to either seal up this box or start completely over. If you don't have the airspace, then two 15s in their reccomended box will be louder than two 18s crammed in a small box that lacks port area.

Maybe the best solution if you have time, is to make a couple boxes for one of the Mjs and test out different port lengths and box volumes.

No doubt, a pair of ported MAW15's would be quite nice back there

I would really like to try an MJ18 in a big box, but I doubt it'd be used in a car

[Viperoni 0]

Oh, and I feel that I should clarify something here.

I'm not in anyway disappointed in the MJ18's performance, moreso in that hitting big SPL numbers is a lot harder than making a slow car go faster

I'm happy with the MJ18's and their performance, and the fact they've taken a beating very gracefully, and keep on asking for more