2 FACE D PORT UP OR 2 FACE D PORT BACK....THAT IS D QUESTION

[CUT BUDDY]

In a 98 Tahoe I plan on going with (2) BTL 18's the dual 1ohms with all the upgrades and (2) Autotek MM4000.1D amps. For a daily driver I was told to do an enclosure that is 18ft3 that has 200sq" of port tuning it to 33hz (really 14ft3 but after port and speaker displacement its 18ft3). Im going to do 2 seperate chambers with 100sq" of port each to help with bracing and sound quality. So it will be 2 ports actually. I'll more than likely face the subs upwards but I dont know if I should face the ports up as well or face the ports backwards towards the rear door. Any suggestions on which way?

[David]

subs up port back works really well in your hoe, but so does subs up port up,

18 cubes of box before subz and port??  that seems like alot to me.

[CUT BUDDY]

No that with the speaker displacement and port included....without its like 14ft3.

[dmanson]

yeh that is kinda big. what happened to 3 - 5  cubic ft per sub? hope it sounds great though

[CUT BUDDY]

for the 18 with all the ugrades he said I could go as low as 5cubed each but he said I would really really see em get nasty in 7cubed each. 2 with the ports and speaker displacement adds up to 18ft3 for both combined. which would be 9cubed each. I thought it was kinda big too considering I could fit 4 15btls in that same enclosure but dats what he gave me.

[CUT BUDDY]

On that note I just saw Meade's first box with 2 MTs and his was 20ft3 and that was before the displacent was added so I know it had to be about 22 or 23ft3

[David]

ok, I see your a lil bit confused on how the internal is figured

you dont add the port and sub volume to the box you deduct it.

like the box i just built, it was 10.4 cubes before I put in the port and subz and it was 8 cubes after port and subs added.

myself personally, I wouldnt go anymore than 6 cube per 18 (after port and sub displacement.)

[CUT BUDDY]

ok, I see your a lil bit confused on how the internal is figured

you dont add the port and sub volume to the box you deduct it.

like the box i just built, it was 10.4 cubes before I put in the port and subz and it was 8 cubes after port and subs added.

myself personally, I wouldnt go anymore than 6 cube per 18 (after port and sub displacement.)

I think I am a lil confused. He told me 7ft3 each with 100sq" of port each. So if I do it subtracting the displacement I would get......14ft3 "minus" speaker and port=10ft3/5ft3 each does that sound about right?

[David]

now your on the right track.

I would ask him if he wants you to do 7cubes after port or before.

[CUT BUDDY]

He said 7ft3 "after" port and driver displacement.