matt402 Posted November 30, 2011 Report Posted November 30, 2011 If you want a wider range, just stay with the ported. Bandpass boxes are a trade off of either great efficiency at a very narrow frequency range (makes them great for SPL) or wider range with much less efficiency. I'm not sure you have enough room to do it with two 18's.. You have no idea what you are talking about Op you are probably going to want to go with a 4th order it will play extremely flat if designed right stick to a 2:1 or 3:1 ratio any higher than that the peak will be too high for what you want you want to start with massive port area and shrink it down to get the sound you want a good timing point to start at is ~45hz I am currently designing a 4th order wall for 4 sundown Z 18s thanks zayres. Quote
bujwah Posted November 30, 2011 Report Posted November 30, 2011 fi n2 are the bees and knees Quote Stay Golden
loudNlow87 Posted November 30, 2011 Report Posted November 30, 2011 If you want a wider range, just stay with the ported. Bandpass boxes are a trade off of either great efficiency at a very narrow frequency range (makes them great for SPL) or wider range with much less efficiency. I'm not sure you have enough room to do it with two 18's.. You have no idea what you are talking about Op you are probably going to want to go with a 4th order it will play extremely flat if designed right stick to a 2:1 or 3:1 ratio any higher than that the peak will be too high for what you want you want to start with massive port area and shrink it down to get the sound you want a good timing point to start at is ~45hz I am currently designing a 4th order wall for 4 sundown Z 18s Not trying to be a wise-ass or thread jac. Yea a 4th order would be a bit more logical over a 6th/8th order.. but what where am I thinking wrong about BP's just finding that happy medium between efficiency and range? Quote '11 Jeep Patriot New Build Head Unit: Pioneer AVH-P3200DVD Front: Massive CK69 Components Front Amp: Massive NX2 Rears: Infinity Kappa's Subs: 8 Sundown SA-8 v2's Sub Amp: AB 450.1 XS D3100 Come on 150!
lem43606 Posted December 1, 2011 Author Report Posted December 1, 2011 Im just wondering exactly how the btls would like being sealed. i know thats what the ported side is for but just wondering how they would handle it. btw anyone have a sketch program they would like to use to help me out? Quote 2 Fi BTL N2 18s Fully LoadedSundown Audio NS-1Kenwood 845 HU Clarion EQ4 Juicebox 3100sKnu Wire"Big 3"Mechman 270a156.3dBTeam GG.
fecupe2001 Posted December 3, 2011 Report Posted December 3, 2011 4th orders are fun , yes they can play a wider range if it´s designed right, just remember something, the wider you want it the less output it has specially at peak frequency, i use 2.5 : 1 ratio and works awesome Quote I´m the SPL Gains topic creator!! wanna get louder?? check this: SPL Gains. Panamenian 2009 & 2010 & 2014 Bass Race 149.9 Champion! 2 15" subs and a 2K wired at 1 ohm, http://www.stevemeadedesigns.com/board/topic/167788-fecupe2001-2-15s-on-a-2k-video-on-page-3/ 8 Massive 15" subs and small power, http://www.stevemeadedesigns.com/board/topic/179296-fecupe2001s-8-15s-4th-order-bandpass-wall/
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