[filezz]

Well I moved to Florida about 3 years ago. I used to live in Atlanta. Anyway I love subwoofers. In fact I love them so much, many of you would think I went overboard on my last project. It was perfect for me. But now in my new home I am unable to have the same setup so I am having to move in a new direction.

I thought I would share the old, along with what my new project will be.


My old setup was 32 yes thats right 32 12" subwoofers.

One set of 16 subwoofers were in the wall in a 6th order box.

The next 16 subwoofers were in the raised floor.

I still have all these subs but in my new house I am unable to use these subs. They sounded great just had low power handling but I made up with that with quantity. I had 1500 watts per 16 subs.

I want to use my amp and still use all my power but in less drives. I will try to make up some of the SPL with bigger, better and more power handling speakers. I have now bought 2 13w7's for the house.. I have one in the car and was very impressed with it. So I ran winisd on the two subs. Looks like I can get a nice flat respomce down to 20hz.. This is in a ported box. I have added the capture of winisd. http://www.flickr.com/photos/zbmarshall/3473823623/

My question on this box is, should I go flat responce or should I go more gain at 30hz or so and it would roll off sharp down to 20hz.

anyway also attached are some pics of my old setup..

http://www.flickr.com/photos/zbmarshall/3473798771/

http://www.flickr.com/photos/zbmarshall/3474606520/
http://www.flickr.com/photos/zbmarshall/3473798739/
http://www.flickr.com/photos/zbmarshall/3474606412/
http://farm4.static.flickr.com/3396/3474606412_8a66c066e8.jpg
http://www.flickr.com/photos/zbmarshall/3457622304/
http://farm4.static.flickr.com/3521/3457622304_ae27b9c687.jpg
http://www.flickr.com/photos/zbmarshall/3456804737/
http://farm4.static.flickr.com/3502/3456804737_d1b4a894fe.jpg

 

[Mike P.]

What's the box size and tuning of your modeling?

 

[filezz]

here you go

 

[filezz]

here is the box at 30 hz vs 20hz 30hz is in red 20hz is in green

30hz would be louder for most things.. 20 is flat across the board..

I can always boost the flat with an eq that is built into the crown 4000 xti that I just picked up for this project.

 

[Mike P.]

If this is for HT I'd tune it to 15 hz and get alot more low end extension. Room gain would boost the dip in the response. With 1000 watts input Xmax is reaches at 13.5 hz so you probably wouldn't need a high pass filter.

What amount of power did you apply to get the 124 db SPL shown in your graph?

 

[filezz]

I have a crown 4000 Xti. So I will be running 2600 watts to the subs. Up to 3000 watts on the pair.

 

[ampire]

Those 13w7's should really slam based upon what Ive seen in car audio :T

 

[Ricci]

I think you should tune a bit lower too. 30hz is quite high for these drivers especially for HT. In a car I'm sure it would pound. I'm assuming since the JL's should be near a 3ohm minimum load, that your XTi will give about 1400w to each driver at the most on peaks. I think 8cu ft (226.5L) per driver tuned to 15.5 or 16hz with a 6" flared port around 35" long looks good. The max port airspeed gets a bit high but it should be ok in use, or you could do a slot port to get more port area. You'd be below xmax with 1400w and have full power output down to 14hz. With the pair it should be plenty nice.