Gary F.

With this design it will play low freq well, no need to tune it to 25-30hz. If you tune it to low it will start to sound sluggish and un-natural. The half hertz, will help with coupling the harmonics of different freq. together. You could look at it like this, if you take a piano and take all the black keys off from it. Music has sharps and flats. If you find your peak freq. with a meter and it's 47hz, chances are it's 46.5hz or 47.5hz. Will you be able to hear the difference probably not but the meter will. As far as the spl goes, this box with the tuning I suggested will still do a decent number, and will be a very good musical enclosure. I have no idea of what kind of music you listen to, but this box should cover everything well. Hope this helps

This setup would do great as a daily/groundpounder. I personally wouldn't go through the hassle of interchangable ports. Build this box and tune it to 41.5 or 42.5hz and you will be happy. If you want you can build another box for just spl. And I know your going to ask why tune it to a half hertz. If you do I will tell you but......

Your resonant freq. is probably going to be around 44-48hz. With the design in your drawing, it will probably be tuned to low for a really good spl score. But would be great for music. To get a good spl tuning you would more than likely end up with a negative port length.

What vehicle?

thx man thats what i was going for with my build I think you need to double up on your mids&highs.

nice to meet you gary.congrats on your titles. im going to do better next time for sure. Thanks. It was nice to put names with faces.

Congrats. Stacy! The doors have to be closed but you can roll your windows down. Its kind of like how the police would determine if your system is to loud.

Congrats. to all of Team Sundown! I think it was 5 World titles, maybe more. Hank your truck is to quiet.

Be safe.

X2. Derrick is the man!

Oh no!! I'm working on a couple of things that most people wouldn't think about. Like I said before just thinking outside the box.

Hmm. How can I gain 3db's by Saturday.

Thanks. But I know there is no way I can catch Curt.

I'll be there in Radical X-1.

If it were me I would do 2 125.2's one per sub. Or a 1000d. Just because the subs will handle 750 watts doesn't mean you have to give them that. I think a 1500d would be a little overkill.

Looking good. Will this be at the Meca Finals?

http://s627.photobucket.com/albums/tt351/dbrevolution/?action=view&current=MVI_0984.flv

Thanks guys. I will not be at the NSPL finals, can't get the time off work to make it down.

you had the blazer? I was there... didn't realize you were Dodge Caravan. I got there kinda late, registered unloaded the van and went straight in the lane.

158.7 at Meca E2 Audio in Ky.

Nice! I think I might need a couple Monster's.