diff in db based on tuned box

How large is the box would be the first question that I have.

If you were my customer, I would have built box as large as reasonably possible and tuned the port some where between 40 and 45 Hz. I'm generalizing because I dont have specs for your speaker.

Just changing your tuning from 30 to 35Hz will increase your relative gain and sound output

I'm gonna see if I can find specs on your woofer

 

OK, the recommendations on MTX website is an enclosure 2.25 cu ft with a port tuning of 34 HZ

My recommendation will be an enclosure volume of 3.25 to 3.5 cu ft, this should fit in a neon with no problem. I would also change the port tuning frequency to between 38 and 40 HZ.

That should help

 

The volume looks like it will be about 3.9 cu ft, so minus the port area we should be pretty close. But can you really fit a 22.5 inch tall enclosure in the trunk of your car?????????????

The woofer and the port should be facing toward the rear of the car.

I'm gonna play with those measurements later today or tomorrow and see what I come up with.

I really prefer the sound of a sealed box, but if you want loud ported is the way to go.

 

I think I got it right.

The total outside dimensions should be 20.5 deep by 26.75 wide by 16.5 tall

The 17.25 measurement is the measurement from the port opening to the end of the port. Whats important here is that the port opening in the box should be 2.5 inches. This should put the tuning between 36 to 38 Hz.

 

Your dimensions show a 22.5-inch height.

The main problem is that the woofer (and port) needs to face the rear of the car, this is important. Listen, measure first then build, if it won't work then give me some dimensions that will work, I'll see what I can do.

Lets design a box that will fit in the car

 

Your welcome, its amazing how a little port retuning and slightly increasing box size will change performance.

Ported boxes are great for controlling subs, so don't be afraid to throw alot of power at it.

Was the fit OK?

 

Well you're sub can handle a clean 1500 watts rms.

Also if the voltage goes from high to low it is not a spike....it is call a voltage drop or dip. Spike would be an increase.

 

No problem lol

 

Loud has nothing to do with the sub. In a ported box, the port makes most of the sound, especially the closer we get to tuning frequency.

First rule of physics, all 15-inch subs have the same surface area and therefore the same ability to be loud. There is no real difference between a 200 dollar sub and an 800 dollar sub.

Now lets get real. An 800 dollar sub is probably a competion type sub, really stiff suspensions, large magnet and great power handleing. These subs need power, and need to be driven at RMS or slightly higher. They need power to perform at there best.

In most comp systems that we do, we always have a battery near the amps



Power drops are always hard on amps, especially a class D. There is no substitude for having a battery next to the amp.

Thanks for the beer offer, but I quit drinking 20 years and 7 months ago.

How about an expresso