BKOLFO4

They came with 2. The 3rd slug was an option.

I gained .7 dB with (4) 15's on 14000 watts going from 3 slug BTL's to new single slug. Both were long coil, dual 1, and dual 1 daily gap. If you buy the old used model, make sure you get good pictures of the tensil leads to make sure they are in good shape before you buy. The BTL's have so much excursion, people are bad about slapping the cone into the spider landing, which kills the leads. Brian

No 8's right now. Tang Band has a nice 8 at Parts Express for under $65. Brian

Quad Dual 4Ω woofers: 2Ω or 4Ω or 8Ω Quad Dual 2Ω woofers: 1Ω or 2Ω or 4Ω Quad Dual 1Ω woofers: .5Ω or 1Ω or 2Ω Please explain these. . .I guess I am missing something. . . Brian

BTL or Mayhem. In my vehicle, BTL was slightly louder on the meter (less than 1 dB), but peaked at a higher fequency vs. the Mayhem. This made the Mayhem sound louder playing music.

Finally started building these after having the part for a couple of months! (2) 12" Fi X Series, Dayton 500 watt plate amp, 3.0 cuft each, 4" aero port tuned to 24 Hz. Should be a nice replacement for this guy's 10" MTX sub.

58" plasma. Really nice with Blu-Ray.

What are the box parameters? Subsonic filter? Setting? How far does it look like the sub is moving? Popping could be the coil hitting the backplate. . .

No cabinet yet, but here they are:

There is a guy on here somewhere selling his IA 40.1's. . .Would be a nice match to a BTL

Do you want to send it in, or do you want a kit? Let me know and I will PM the info to you.

Use a 1.5 volt battery (AA, C, D, etc) and test each coil. Just add a couple of pieces of wire to the terminals, hold the negative to the battery, and pop the positive a few times and see if anything happens. That is a quick test to make sure the coils are not open (like a broken lead). Brian

I got a friend of a friend that knows something about Vintage Air. . .I'll be gettin something when the time comes.

These are really nice if you need them now: Tang Band W8-740P 8" Subwoofer - item number: 264-854 http://www.parts-express.com/pe/showdetl.cfm?Partnumber=264-854#

Do you need my shipping address????

I assumed 15", but that is a good point.

That looks good. (2) 1500's can make some good power if you are keeping the voltage up. Better watch the excursion after you get it fixed. Might want to take the subsonic up higher to start and then back it down as you know everything is alright.

Who built the box? Sure it is tuned where you think it is? That is a lot if power. If everything is setup correctly, a BTL will be fine. If not, it will rip apart as it did. Post up the full set of box dimensions if you want me to check it out.

MAN!!! You must be killing that thing mechanically. . .What are the box specs, how much power, and are you using a subsonic filter? I absolutely punished my BTL's beyond what any sub should ever have to take and they looked brand new when I sold them. That may need a recone, but you could try Loctite 20 minute 2-part epoxy or rubberized CA glue. Brian

I am going to guess you would get more out of the box with less bends in the port and still more than enough port area. Do you have a router table? Last box I did with that many bends, I used PVC to round the U-turns like this: Smooth airflow through the ports is a good thing. . .

I am curious, why so much port area for (1) 12"? I would make that port smaller and do a single bend port that runs along the back wall. You could do 12.75 x 4.75 and have only one bend while still having 60 sqin of port area. More than enough for a single 12". I assume this is a daily box and not a fart box, since it is tuned to 32 Hz.

That will work. . .Fairly large box, so don't forget to add a few braces inside.

The only additional cost is the return shipping. You will have to pay the difference between shipping a kit and having the reconed driver shipped back to you. PM me your zip code and I can get the total pricing for you and get it setup to send in. Brian

The loads are 2 ohms and 6 ohms in the diagram you posted, that is why the voltage drop is not even. If the resistors were the same size, it would be a 12 volt source with 6 volts dropping across the first resistor and 6 volts dropping across the second one.