At what freq should I tune my box?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=59985
Printed Date: April 18, 2024 at 5:10 AM
Topic: At what freq should I tune my box?
Posted By: AJRXtreme
Subject: At what freq should I tune my box?
Date Posted: July 24, 2005 at 4:49 PM
Ok i listen to all rap and low hitting beats. Right now i have 2 15" hpo's from memphis in a ported box that i built. I used Winisd to design the box. I want to add 2 more 15"s and have a total of 4 subs walled off in my expedition right behind the second row. I know my car will have less air space and so i have no idea where i should tune my box. The box is going to be ported. If anyone can help me, it would be very appreciated, thankyou.
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Replies:
Posted By: Bigsingh
Date Posted: July 24, 2005 at 5:38 PM
why dont u put each sub into an individual space and then port each box
-------------
6* Rockford T2's
6* POWER AMPs
BLACK CORRADO
BAANNGGIINN
Posted By: AJRXtreme
Date Posted: July 24, 2005 at 6:55 PM
actually i wanna go with 6 15"s and all 6 are going to be seperated and have there own port, i dont know where to tune all of them. Also 2 of the subs are DVC 4 ohm and 4 of them are SVC 4 ohm. How should i wire them all up?What amps should i put on this setup and will i need any extra batteries? I currently have a 200 amp HO alternator. Should i get a yellow top battery for under my hood? Thankyou
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: stevdart
Date Posted: July 25, 2005 at 6:58 AM
AJRXtreme wrote:
Also 2 of the subs are DVC 4 ohm and 4 of them are SVC 4 ohm. How should i wire them all up?
You shouldn't. Use all subs that are equal in voice coil/impedance configuration and come up with a total impedance that the amp can handle. ------------- Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: soundmasta
Date Posted: July 25, 2005 at 9:19 AM
tune your box to 33 Hz. it's the frequecny at which the clitorios resonates. you'll get all the chicks.
Posted By: AJRXtreme
Date Posted: July 25, 2005 at 10:01 AM
Haha Soundmasta that would be awesome if i could do that. Stevdart, Should i just buy all 6 SVC subs? And sell the DVC's i have now?
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: stevdart
Date Posted: July 25, 2005 at 12:50 PM
You can come up with 1.33 ohms using six DVC 4's, wired series/parallel. Six SVC 4's would amount to a low impedance of 0.67 in parallel, which would be too low, I would bet. DVC 2's wouldn't work, either, because they would come out the same as the SVC 4's. But really, I'm not sure how you're planning to power them (amp).
-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: AJRXtreme
Date Posted: July 25, 2005 at 3:06 PM
My other question was what amps should i put on these subs? I want to spend the least amount of money as possible. I was thinking 2 1000D's from memphis and have each amp power 3 subs, but then how would i wire 3 subs together? Could I buy 2 more jbl600.1's to add to the one i already have? I can get 6 SVC 4's for $600 shipped. I cant get anything for near that price around here so i wanna take advantage of that offer. If anyone has any ideas that would be AWESOME, thankyou ------------- 03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: Drewt
Date Posted: July 25, 2005 at 3:18 PM
Alright, it sounds like you're in a little over your head, but we'll help you as much as we can if you're willing to learn a little. If you have 3 4-ohm subs (single voice coil), and you wire them all in parallel, then you get a 1.33 ohm load on the amp. Then, if you power each set of three with a Hifonics Brutus amp (they go for around $215, use e-bay or froogle.com), you'll be giving each sub around 333 watts RMS. that's alot of power....
-Drew
Posted By: AJRXtreme
Date Posted: July 25, 2005 at 3:27 PM
So i would need 2 hifonics amps or 1? Ive heard those are good amps. Could you show me a wiring diagram with 3 subs 4ohm SVC? Im thinking i would power 1 amp to 3 subs and another amp to the other 3. How many watts rms does the brutus amp put out at 2ohms? and is it 1 ohm stable?
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: Drewt
Date Posted: July 25, 2005 at 3:38 PM
You would need 2 amps
ok...correction to my past post, the subs would probally be getting closer to 300 watts RMS.
The brutus puts out 1000 RMS at 1 ohm (it IS one ohm stable)
as far as wiring...go from the + on the amp to the + on all 3 subs, and then from the - on the amp to the - on all the 3 subs. Then do the same for the other amp. I'm not shure what those subs are rated for, 300 may or may not be enough power for what you want.
-Drew
Posted By: AJRXtreme
Date Posted: July 25, 2005 at 3:43 PM
Each of the HPO's are 300wrms, plus im going to be porting the box so they dont need as much power.
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: Drewt
Date Posted: July 25, 2005 at 5:40 PM
then that setup should actually work well for you. Good luck!
-Drew
Posted By: AJRXtreme
Date Posted: July 25, 2005 at 5:52 PM
Drew, Thankyou very much, i appreciate all your help!
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: AJRXtreme
Date Posted: July 25, 2005 at 5:52 PM
Drew, Thankyou very much, i appreciate all your help!
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: boardinbum
Date Posted: July 26, 2005 at 1:50 AM
Just in case you're still looking for a diagram, you can find them here
|