vee333gp Posted April 23, 2010 Report Posted April 23, 2010 hi guys just built a 4cuft box with 2 12" conected in 1 ohm with 2000 rms into them but not doing high numbers on TL most 141db please help.
toaster Posted April 23, 2010 Report Posted April 23, 2010 What type 12s? Port area and tuning? Vehicle? You want help but I don't have enough info... Former USAC Director MECP Certified First Class of 1997 First car in the world to register 150db from the dash and sealed, in the trunk of an escort, with 2 10 inch subs. In 1997: http://audioforum.termpro.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=51;t=002600 Just my part in the modern development of SPL competition:)
aleroking Posted April 24, 2010 Report Posted April 24, 2010 whats it tuned to? Im guessing its ported? If you want a strictly spl setup then tune to your vehicle resonance frequency which would probally be like 50+ hz 2 fi btl 18s on 2 crescendo 3500s walled in a 2dr 2000 alero build log http://www.stevemeadedesigns.com/board/topic/141663-2-walled-btls-18-on-7k-in-a-2000-2dr-alero/
toaster Posted April 24, 2010 Report Posted April 24, 2010 You actually need to tune a few cycles below rf to peak at rf, in most cases. It takes some experimentation. Former USAC Director MECP Certified First Class of 1997 First car in the world to register 150db from the dash and sealed, in the trunk of an escort, with 2 10 inch subs. In 1997: http://audioforum.termpro.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=51;t=002600 Just my part in the modern development of SPL competition:)
Neo_frog Posted April 24, 2010 Report Posted April 24, 2010 Your setup sounds like it should be doing those numbers. I'm doubting you are going for a strictly SPL setup since you can't play music on it. Need an install? Hit me up.[email protected]Got car audio questions? Check here first!Everything you need to know. =]http://www.stevemeadedesigns.com/board/topic/83029-everything-you-need-to-know/
fecupe2001 Posted April 25, 2010 Report Posted April 25, 2010 What were you expecting from a 4 c/f box and 2K watts before impedance rise and voltage drops??? 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/
vee333gp Posted April 26, 2010 Author Report Posted April 26, 2010 2 cerwin vega v max with a 6" aeroport 200mm long and the car is a vw golf rabbit 4door thanks for the replies
macisme Posted April 28, 2010 Report Posted April 28, 2010 You actually need to tune a few cycles below rf to peak at rf, in most cases. It takes some experimentation. So if my Trucks RF is said to be around 38 hertz should I have my box tuned for around 35 hertz? Enter witty comment here.
fecupe2001 Posted April 28, 2010 Report Posted April 28, 2010 For SPL no, you start around 10 hz below resonant frequency, and you start to retune, usually i get around 5 hz below, but depends on a lot of things... 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/
vee333gp Posted April 28, 2010 Author Report Posted April 28, 2010 fecupe u seem to have alot of knowledge please help, what causes impedance rise an email so we can talk
Recommended Posts
Archived
This topic is now archived and is closed to further replies.