Let me start off by saying that this is my first build which wasn't easy as I didn't get a lot of help on this forum (except for LTD02 and I thank him for that) and had to sign up on audioholics as there was a nice mod named annunaki who would be able to answer all my questions regarding my build as he did a few builds with JL subs for car and HT.
No lets move on...
I know I know, I've heard it here before on this forum JL subs suck as they're overprice... I could've done better with the same amount of money... Yada yada yada...
To be honest, I had these subs for 5 or 7 years (I can't remember) and have NEVER used them. I originally bought them for my car but never got around to installing them so they sat in my closet in boxes as I thought that there were no HT amps that would go down to 3 ohms with any decent amount of power. About 6 months ago I decided to do a yahoo search to see if I could use them in my condo and found a thread or two on this board, as well as, a few other websites but most were only inquiries that never became anything. Once I discovered the DIY section here on AVSforum it would only go downhill from there. I discovered that there were a few amps that would be able to power these small beasts so I waited and scored a mint Crown XLS2500 amp for $340. In November I decided to start the build with the help of a fellow retired friend who unintentionally would do most of the building for me as my Calculus class would literally kick my a$$ for the rest of that semester as it's been 7 years since I had a math class and jumping straight into Calculus would be a challenge. Fast forward a few weeks ago and the project is FINALLY done! Specs:
I built a 24" cube with 3/4" walls and a 1.5" front. After bracing, port, and speaker displacement I will have ~4.5^3 ft. of available space with a 4"x10"x48" port which will give me ~21HZ tune. With the crown amp that I'm using it'll put out 775 watts @ 4 Ohms. With these specification I should get roughly 111dB at 20Hz and 113dB from 22Hz and up with a 19Hz 4th Order HPF. This is my first sub but from what I understand that isn't too shabby for a single 10" sub. I'm building two so you can add ~6dB to each of those numbers to give 117dB at 20Hz. That should sound pretty nice I would think.
I have a balanced MiniDSP for HPF and EQ.
All I have is a radio shack (33-2055) spl meter so there's no measurement charts. I created some -0dbfs sine waves to be played back on my HTPC starting from 15Hz and going up to 95Hz in 5Hz increments and recorded the information. Here's what I got with my Onkyo Processor at -10dB, all bass settings at 0 and the crown pots at 3 o'clock (75% up). The MiniDSP is set up at:
HPF: 19Hz BW 36dB/oct
LPF: 110HZ BW 36dB/octHZ dB
90 77HZ dB
(Eq'd with 47Hz Gain -3 Q6)
I don't know if any of these MiniDSP settings are correct as WinISD's HPF setting for my sub is a 19Hz 4th order crossover but I don't know what that equates to in the MiniDSP as it's different but the subs haven't blown up yet so I must be ok. If someone can help me optimize my subs a little better I'd appreciate it. Pictures:
My goal was to try to get a rosewood stain and somewhat match my Boston towers.
Super old Craftsman router that I borrow from my grandfather-in-law.
Quarter-Round trim molding.
First time staining. As with anything it should go better the next time around...
My living room.
This is the sub that I was using. The box was designed for a 1993 Ford Ranger regular cab which was my first car in 1995. I think it originally housed the original 10W1's. I still love the old skool JL subs with the logo on the dust cap.