posted
Im designing a box thats 3.125 cubes before displacement (anyone know displacement of each RE8) I was planning on putting two 4" pvc ports in the box. IS this too much port for these RE8's??? Thanks in advance.
-------------------- 1996 Audi A4 2.8QM Rockford 801s 6 RE 8's Posts: 205 | From: NorCal | Registered: May 2004
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posted
Displacement is 0.09 per sub. 6-8 sq. in. of port per sub should work well. I'm currently running 8 of those subs and they are incredibly versatile and meaty little monsters! I think you will enjoy them.
Kind Regards, Matt
Posts: 155 | From: Florida/Colorado | Registered: Jun 2004
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posted
4 is fine but length is the question. Running 3 or 2 will create a whisling sound.
-------------------- New Toy YFZ450 04' White / Red Lots of Mods and very fast. --------------------------- Next Project is Finish up 91' S-10. Some Day!! Posts: 86 | From: Olympia | Registered: Oct 2003
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posted
alright thanks, i think im going to have two 4" PVC about 9-10 inches long. My box is a little less than 3 cubes after sub displacement. I think its tuned in the low 30's, should sound great. Thanks for the help! SCott
-------------------- 1996 Audi A4 2.8QM Rockford 801s 6 RE 8's Posts: 205 | From: NorCal | Registered: May 2004
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quote:Originally posted by mtxscott: alright thanks, i think im going to have two 4" PVC about 9-10 inches long. My box is a little less than 3 cubes after sub displacement. I think its tuned in the low 30's, should sound great. Thanks for the help! SCott
posted
Use two 4" ports 17" long if you can. Tunes to about 33Hz with a 3cf enclosure. You can use 90 degree elbows if needed. A single 5" vent 13" long would work also.
Posts: 525 | From: Boston, MA | Registered: Sep 2003
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posted
should give you pretty flat response....personally I tune to around 20-24hz, not sure too lazy to calculate it 8) but anyways if I were you I'd go for the single 5" port just because it's easier to do and you don't have to mess around with elbows and such.
posted
haha, well i kinda already made the box :-) but for next time... where do they sell 5-6" PVC? orchard supplys? i looked at home depot but i couldnt find it, maybe it was just me tho.
I think the two 4" PVC will work for now tho. Maybe ill build another box when i get the time.
Thanks for the help guys! Scott
-------------------- 1996 Audi A4 2.8QM Rockford 801s 6 RE 8's Posts: 205 | From: NorCal | Registered: May 2004
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posted
If you use two 4" diameter ports 10 inches long each you are going to be tuned to around 43 hz after port and sub displacement, not low 30's! To get down to 33 hz you'll need a pair of 4" ports 20 inches long.
Why not do a slot port?
-------------------- 2001 Jeep 4.0L, 2" lift, Old Man Emu shocks 33x10.50 BFG AT's, Aussie Locker Some stereo junk More mods added with every paycheck Posts: 192 | From: Arizona | Registered: Feb 2002
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