JMZNeal Posted March 31, 2010 Report Share Posted March 31, 2010 (edited) lets say you build a box that's bigger than recommended by the manf., but the port is big enough and tuned really low like 28hz. what happens to the efficiency of the box as in watt handling. does port area need to increase/decrease? can it hurt the sub? Point to this is i built a box for a Philips home 8" today that came out of a all in one home theater kit> surrounds, dvd player, and sub. the dvd player(the brain) died but i still had the sub which was useless with out the brain telling the amp in the box what to do. from what i can tell the old box is 9x9.25x14 .5mdf and tuned to 50ish hz. with 4.9"2 port area at .5ft3 net volume the one i built is 9x13x20 .75mdf and tuned to 28hz with 5.16"2 port area (2.25x2.25x17)port at .98ft3 net. ??? I was thinking i was building it for a future sub to go in and use this one for now. maybe a sundown 8" or something beefy. what do ya'll think it would sound like with just a 300.2 on it? i don't even know the ohms load? Thinking about trading my GF her 600.2 kenwood for the box, sub, and my boss 300.2 chaos craptastic amp. i think it'll sound good at moderate levels just not with lots of power(hense the amp swap) Edited March 31, 2010 by JMZNeal Quote JVC AVX-44 and 360.2 Subs: 2 RF T1 12s 1ohm mono off a RF T1500bdcp 80hz \/ in a 2.3cube 45hz slot port Mids: 2 O2 8's off a Punch 550.2 behind seat, 2 Image Cxs 6.5's and 2 ID XS 6x9s 80-3khz in doors on a T600.2 Highs: 2 ID CD.1 MH HLCD 8ohm off a RF 400.4 3khz /\ Link to comment Share on other sites More sharing options...
chill phil Posted March 31, 2010 Report Share Posted March 31, 2010 bigger box = greater efficiency, but less power handling. Overpowering the sub could damage it. Quote 2007 Nissan Xterra SE Amp: Sub: Box: Electrical: TL Scores: Link to comment Share on other sites More sharing options...
Kranny Posted March 31, 2010 Report Share Posted March 31, 2010 too big means less power handling for the woofer. and why the hell do you want a 28hz tuning? Quote Link to comment Share on other sites More sharing options...
finkster Posted March 31, 2010 Report Share Posted March 31, 2010 (edited) as the box area increases power handling decreases, as there isnt much back pressure on the sub. Edited March 31, 2010 by finkster Quote DAT 4125------>RE XXX comps active Eclipse cd7000 I serve drunks for a living Link to comment Share on other sites More sharing options...
baaudio Posted March 31, 2010 Report Share Posted March 31, 2010 Throw a voltmeter on the coil(s) set to ohms to check the ohm load Quote Team NWSPL baaudio Build Log 2001 GMC Sierra walkthrough 4 Mechman Elite 370s, 10 AGM batteries, 3 Crossfire XS v2 18s, Crossfire 8k Link to comment Share on other sites More sharing options...
St.Ides Posted March 31, 2010 Report Share Posted March 31, 2010 too big means less power handling for the woofer. and why the hell do you want a 28hz tuning? why not? The Iceman is tuned to 22Hz. Quote TNCB ....my damn room was shaking, im like wtf is this how am i gonna die jakin off to vida guerra? Link to comment Share on other sites More sharing options...
raytard Posted March 31, 2010 Report Share Posted March 31, 2010 ice man isnt running a single 8 ripped out of a HTIB that went bad... .5 cubes should be fine for a normal 8, but dont expect the one you have to take any sort of real power, especially in a different box Quote Build: http://www.stevemeadedesigns.com/board/ind...hl=avalon+build monster/rockford/kicker/stinger cables, pioneer source, jbl highs/amps, kinetik/shuriken batts, iraggi alt, dei security, dc subs(atleast for now) Team DC Link to comment Share on other sites More sharing options...
St.Ides Posted March 31, 2010 Report Share Posted March 31, 2010 ice man isnt running a single 8 ripped out of a HTIB that went bad... hahaha. true. i say try it out. learning experience! Quote TNCB ....my damn room was shaking, im like wtf is this how am i gonna die jakin off to vida guerra? Link to comment Share on other sites More sharing options...
Kranny Posted March 31, 2010 Report Share Posted March 31, 2010 why not? The Iceman is tuned to 22Hz. he isnt running a home theater 8 is he? Quote Link to comment Share on other sites More sharing options...
pstone11 Posted March 31, 2010 Report Share Posted March 31, 2010 he isnt running a home theater 8 is he? Nah, I think he runs 2 of em' Quote Check out StoneSounds to see my recent builds.Or look at the Flying White Facebook Page! Link to comment Share on other sites More sharing options...
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