drjjg

iTrader: (1)

I'm considering buying 4 RE 8's(running @ 8ohms off my Orion 2500d)

I was gonna port em with 4 cubes net, 60sq" tuned to 34hz.

I also was thinking maybe of doing an ABC since you run the 8's in one with success. Jon from Genuine also is quite happy "abc'ing" them too.

Now, from what I understand about the ABC, I would take the volume I would "normally" port them(in this case 4 cubes net) and divide it into 2 chambers( a 66.6% - 33.3% ratio)

Then I would find out the port I would need to tune to 34hz for them, and split that length up(a port for each chamber, and one to connect the chambers)

Am I right so far???


The only thing I was wondering is, how do you cut up that port? In equal lengths? Would 1 6" port be enough? Or should I maybe do a 7 or 8" ?

If you could give me a design for that, I'd appreciate it. I'm curious to see one of these "ABC" boxes in action. See how good they really are [img]graemlins/beer.gif[/img]

Orion_95

4 cubes is alot for 4 8"s. ...if you wanna go that big, you will defenetly need more then 60 sq inch port.

2 8's AKA Jeepbeats

iTrader: (19)

Orion is right, RE recommends .5 ported per sub, tuned to 32 hz. I built a box yesterday for my one RE8 that is around .58 cubes, with a 2"x15" port (around 32-35hz I think?). Sounds awesome, realy hits the lows nicely. The ABC is supposed to be sweet too. Good luck!

SUX 2BU

iTrader: (1)

You are on the right track. When it comes to find out the port length though, model the box for 2 ports, not one. Let's say your program says you need two 3" ports, 11" long in order to port your 4 cube box to 35 Hz (I'm just throwing numbers out there). Your port tube you want to use then is 3" x 11" long. So, each chamber would get a single 3x11 port and the connecting port would also be a 3x11. You model for 2 ports even though you use the size for one, but use it 3 times. Make sense? [img]graemlins/freak.gif[/img]

Orion_95

sorry dodge, i was talking just ported, not abc.