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<blockquote data-quote="nutnbutcustm" data-source="post: 7978568" data-attributes="member: 576497">I have been building systems for about 16 years I just never have built or messed with a 4th order.but i have decided no better time than now! so here is my info....Purpose: street beat I want to do demos and do street beat in usaci so my goal is to do 160+ on music @47hz for 30 seconds at a time. I say 47hz because my truck peaks at 45 and 47hz is the track i have to use for street beat.equipment: I have 4-12&quot; B2 XC&#039;s being powered by 2-B2 M1&#039;s I could swap out to 15&#039;s but would like to stay with the 12&#039;s if my goal is attainable with them.space: I have a 2005 Nissan Xterra that i can do anything with, my demensions are roughly 40&quot;wide 36&quot;tall 40&quot; deepi can go bigger but i would like to keep it this size or smaller to be able to remove the box to try different designs. it has a false floor &quot;base&quot; already installed. also would like to use a large aero port for the front chamber tuning rather than a slot port.If you need anymore info just let me know, and if i need to pay you something just let me know.B2 XC 12&quot; specsPower Handling: 6 kw ~ 15 kw*Sensitivity: 86.1 dBNominal Impedance: 1 Ω(Re):0.9 ΩResonanse Frequency (Fs): 38.3 HzVas:&nbsp; 16.51 LQts:&nbsp; 0.331Qms: 4.848Qes: 0.356Voice Coil diameter:&nbsp; 4&quot;I have tried to message @80inches but his pm box is full so anybody else have any advice? this is a huge build with some pricey equipment so please only help from guys that have built and have a lot of experience with 4ths please! and thanks in advance for any help!</blockquote>

[QUOTE="nutnbutcustm, post: 7978568, member: 576497"] I have been building systems for about 16 years I just never have built or messed with a 4th order.but i have decided no better time than now! so here is my info.... Purpose: street beat I want to do demos and do street beat in usaci so my goal is to do 160+ on music @47hz for 30 seconds at a time. I say 47hz because my truck peaks at 45 and 47hz is the track i have to use for street beat. equipment: I have 4-12" B2 XC's being powered by 2-B2 M1's I could swap out to 15's but would like to stay with the 12's if my goal is attainable with them. space: I have a 2005 Nissan Xterra that i can do anything with, my demensions are roughly 40"wide 36"tall 40" deep i can go bigger but i would like to keep it this size or smaller to be able to remove the box to try different designs. it has a false floor "base" already installed. also would like to use a large aero port for the front chamber tuning rather than a slot port. If you need anymore info just let me know, and if i need to pay you something just let me know. B2 XC 12" specs Power Handling: 6 kw ~ 15 kw* Sensitivity: 86.1 dB Nominal Impedance: 1 Ω (Re):0.9 Ω Resonanse Frequency (Fs): 38.3 Hz Vas: 16.51 L Qts: 0.331 Qms: 4.848 Qes: 0.356 Voice Coil diameter: 4" I have tried to message @80inches but his pm box is full so anybody else have any advice? this is a huge build with some pricey equipment so please only help from guys that have built and have a lot of experience with 4ths please! and thanks in advance for any help! [/QUOTE]

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