Mike Gibbens Matthew Posted April 4, 2014 Report Share Posted April 4, 2014 UPDATE PAGE2, POST2 Finally found a cool audio place where I can stand the people. Not many places to choose from where I live. Anyway after some financial issues and an amp getting wet and blown. 2 year old got my keys and popped my trunk, started up the car in the morning and didnt realize it until there was no B00M! I was like WTF IS MY TRUNK DOING OPEN!!! Good thing I live in the country and everything else was still there. So I messed around with stuff and found an old spare DEI Directed D1200 (600w RMS) Hooked it up and took off. So I have 2 12" Treo TE (500rms underrated) Prefab Sub Zero box ported tuned 34hz .66cu per sub (way too small) Pioneer x8500BT HU Infinity Kappa 4x6 plates in the front doors Stock 6x9 in the back Big 3 in 2\0 welding cable standard battery under the hood 6ga power and ground stock alt So we did a sweep on the termlab to find my peak freq. (39hz) Ran it through a couple tests and managed a 136.9 sealed on the dash No tweaking or tuning this was a freebie 15 min on the LAB to get a bass-line So having never competed or been metered, is that pretty good for 600w? Oh yeah and subs\port firing into cab with 1\2 backseat down. Any input would be great although I feel like I should have been closer to 140! 07 KIA Spectra 320a Singer Alt Odyssey Extreme batteries 2 12" Phantom sounds (4.6 cu. net @ 32) - soon to be 2 Atomic ELE 2 Rockford Fosgate T2500bd-CP Zapco Z150.2 Front comps soon to be Hertz HSK Pioneer 80prs Second skin deadener throughout Link to comment Share on other sites More sharing options...
alaskanzx5 Posted April 4, 2014 Report Share Posted April 4, 2014 A better box and that 40 will be possible. its not bad for low power but I'm sure the right box would do much better. 39hz is awfully low of a peak. Horrible freq range with that box from the giving info. t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz. Link to comment Share on other sites More sharing options...
Mike Gibbens Matthew Posted April 4, 2014 Author Report Share Posted April 4, 2014 Do you think with a box built to spec and double the power could get me a 145? What do you think I should tune the box to if I plan to do some small competitions as well as listen to my music (rock, rap, dubstep style elctronic) Is it true that my peak frequency has as much to do with the box tuning as my cabin's resonant frequency? And car is 2000 chevy malibu by the way 07 KIA Spectra 320a Singer Alt Odyssey Extreme batteries 2 12" Phantom sounds (4.6 cu. net @ 32) - soon to be 2 Atomic ELE 2 Rockford Fosgate T2500bd-CP Zapco Z150.2 Front comps soon to be Hertz HSK Pioneer 80prs Second skin deadener throughout Link to comment Share on other sites More sharing options...
alaskanzx5 Posted April 4, 2014 Report Share Posted April 4, 2014 Yeah the low box volume and port area is causing you to peak real low. Moat cars resonant freq is right around 50hz. I don't know the subs but doubling power will get you up to 3db gain I would only count on a 1db gain. A better box will be your biggest gain. I could see as much as a 3-5db gain compared to that pos box. for tuning with an all around good musical box around 33-35hz is usually recommended. Using round ports you could swap them out for shorter ports easily for a higher tuning so you can do better on a meter. For 2 12s you want around 3.5-4.5 as a rough suggestion of net volume. a more difficult and idea is to male a slot ported box. Port being tuned to around 38-42hz then use mdf to shrink the port sown to lower tuning for daily use. Just takes more work that route. t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz. Link to comment Share on other sites More sharing options...
Mike Gibbens Matthew Posted April 4, 2014 Author Report Share Posted April 4, 2014 1.6 cu ft net 16 sq in vent 18.5 in long F3=31hz Is what it recommends per sub on manufacturer website I like the idea of switching ports. 07 KIA Spectra 320a Singer Alt Odyssey Extreme batteries 2 12" Phantom sounds (4.6 cu. net @ 32) - soon to be 2 Atomic ELE 2 Rockford Fosgate T2500bd-CP Zapco Z150.2 Front comps soon to be Hertz HSK Pioneer 80prs Second skin deadener throughout Link to comment Share on other sites More sharing options...
soundsystemaniac Posted April 4, 2014 Report Share Posted April 4, 2014 a 145 sealed on 600 watts on music out of the trunk is basically unheard of Chevy astro 2 18s and 9k rms Walled!http://www.stevemead...rms-42-inch-tv/JEEP GRAN CHEROKEE SRT8 BUILD!2 JL AUDIO 15s trunk buildDC XL 15 buildDC level 3 18 buildhttp://www.stevemead...verunner-build/ http://www.facebook....hp?id=646651228 Link to comment Share on other sites More sharing options...
alaskanzx5 Posted April 4, 2014 Report Share Posted April 4, 2014 He was saying doubling his power to so that, so 1200rms. Possible but hard. 2 12s on 1200watts I could see a 140-141 maybe a 142. t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz. Link to comment Share on other sites More sharing options...
CleanSierra Posted April 4, 2014 Report Share Posted April 4, 2014 I'm going to be throwing 3500W at 2 10s and my GOAL is 144-145. I hate regular cab pickups Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
alaskanzx5 Posted April 4, 2014 Report Share Posted April 4, 2014 Yeah and you will have a little more then double the power. You also have a lot of experience with box design. op double power I could see a low 140 in a good box. However if you want to get to a 145 around 2-3k on 2 12s can get you there. With the the right box of course. t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz. Link to comment Share on other sites More sharing options...
jarrius Posted April 4, 2014 Report Share Posted April 4, 2014 He was saying doubling his power to so that, so 1200rms. Possible but hard. 2 12s on 1200watts I could see a 140-141 maybe a 142. first to OP build a good box and it will for 1 sound better and be louder. MAY BE if you put 1.2k to each sub you may hit a 145 but with 600 rms each in a box made for music not burps I don't think so Second Alaskan I hit 142db with 1 12 on 1200wrms with stock electrical easy so it is possible hell my goal is a 145 with 1 12 lol 2012 Chevy sonic1xSQ HDC3 12 D2RF R1200d 140 square foot of Q-Mat(soon to be installed) 140.2Db sealed on the dash with TL 142 DB sealed on the dash with another meter (was dead on with the TL at a show i was at) 141 on music. strangeduck,on 02 Jan 2014 - 01:39 AM, said: when my car spins out i just put the car in neutral, turn in the direction i want to go and pucker my asshole Link to comment Share on other sites More sharing options...
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