what do i need! jbl 1200 .1
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=28622
Printed Date: July 14, 2025 at 4:17 AM
Topic: what do i need! jbl 1200 .1
Posted By: skylark
Subject: what do i need! jbl 1200 .1
Date Posted: March 18, 2004 at 5:56 PM
i just bought 2 jbl 1200.1 amps i gonna run each amp to an pair of kicker compvr 12's so i will have four in all running off two amps. i have an 200 amp alt and a 2 frd cap. im gonna be running 4 guage wires to each amp for the power and ground. should this be enough power for the amps.?
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goingcrazyonsound
Replies:
Posted By: DYohn
Date Posted: March 18, 2004 at 7:59 PM
As long as your wire run is not too long 4 AWG will be fine. If it's over 5 feet I suggest you up the gage to 2 AWG. 200 amp alt should do the trick.
Posted By: Ketel22
Date Posted: March 18, 2004 at 9:23 PM
are you running the 4 ga to each amp from the battery or a distro block after the cap?
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Quad L Handyman services
Posted By: skylark
Date Posted: March 19, 2004 at 5:09 PM
im running the wire to an cap then an distro block then i will run to the amps ------------- goingcrazyonsound
Posted By: aerojw317
Date Posted: March 19, 2004 at 7:52 PM
i have the same amps in some of my crews cars, for best preformance go with two 2 ga wires (one per amp) and skip the cap all together (i'll just slow you down) run a duel battery setup (its cheap to do.. if you need to kow how e-mail me at nhhs455@hotmail.com subject: "jbl 1200.1 amp install") this will have the amp runnin at its peak. each amp is ganna pull about 120 amps total of 240 (your alt will be fine even if you do teh duel battery setup) too bad you chose those kickers, i went with two audiobahn alum15Q's (15" subs) blew out a back glass in about three weeks ------------- zonefire317
Posted By: Alpine Guy
Date Posted: March 20, 2004 at 6:23 PM
you don't need that back glass anyways 
Posted By: Ketel22
Date Posted: March 20, 2004 at 6:27 PM
the only time you need a back windshield is when you drive too slow. ------------- Quad L Handyman services
Posted By: aerojw317
Date Posted: March 21, 2004 at 7:00 AM
replaced it with plexxy, but i reveresed rivioted it so it accually looks decent. my other vehicle had to have the side privacy windows replaced with plex as well, damn chevy (94 blazer Full-size) <-so you understand..
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zonefire317
Posted By: flatulatta
Date Posted: March 21, 2004 at 12:30 PM
ur gonna blow those subs with those amps i had a jbl bp 600.1 hooked up 2 2 cvr12s and almost blew them so a 1200 might be pushing it b/c those amps push out way more than they say they do ull be pushing about 1500+ watts
Posted By: skylark
Date Posted: March 21, 2004 at 2:07 PM
how do you know if thats true because my audiobahn 1500hct amp wasnt even making it hit hard and its supposed to be 2000 watts at one ohm but im being to see that audiobahn amps are overrated. but i hope my subs dont blow but if they do i have 2 brand new p gold ti15d subs so if it does not sound good i will get an ported box custum made for the p golds and hook each amp up to each sub.but hopefully the compsvrs can handle the jbl's. i will know by tommorrow how it sounds because im gonna put it in around noon tommorrow
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goingcrazyonsound
Posted By: flatulatta
Date Posted: March 21, 2004 at 2:16 PM
well what kinda box are the cvrs in?? cuz i had a banpass and my coils where heating and iwas told it was the box so i guess it depends
Posted By: skylark
Date Posted: March 21, 2004 at 5:35 PM
i have an sealed box with each sub in its own chamber. the cubic feet is 1.25 each chamber
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goingcrazyonsound
Posted By: FullForce
Date Posted: March 21, 2004 at 6:49 PM
skylark wrote:
how do you know if thats true because my audiobahn 1500hct amp wasnt even making it hit hard and its supposed to be 2000 watts at one ohm but im being to see that audiobahn amps are overrated. but i hope my subs dont blow but if they do i have 2 brand new p gold ti15d subs so if it does not sound good i will get an ported box custum made for the p golds and hook each amp up to each sub.but hopefully the compsvrs can handle the jbl's. i will know by tommorrow how it sounds because im gonna put it in around noon tommorrow
have you verified that? I have tested the Audiobahn 1300HC series amp to about 1575 watts RMS and its rated at 1200 RMS
Posted By: skylark
Date Posted: March 21, 2004 at 10:24 PM
nope but an few years ago i was running 3 jl audios 12's off an 600 watt jbl mono block amp and i was hitting way harder then i was when i ran the audiobahn amp on my 4 kickers. thats why im gonna put 2 jbl 1200 watt amps on each pair tommorrow.
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goingcrazyonsound
Posted By: skylark
Date Posted: March 21, 2004 at 11:13 PM
i just checked out what kind of alt that i have. its an 140 amp alt made by PROFROM. i ordered it out of jc whitney for an 149.95 . my engine is an 77 olds rocket.........so is that an cheap alt or an alright brand.need to know asap because im gonna put my equipment in tommorrow and i might need to upgrade the alt right?
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goingcrazyonsound
Posted By: aerojw317
Date Posted: March 21, 2004 at 11:25 PM
"i just checked out what kind of alt that i have. its an 140 amp alt made by PROFROM. i ordered it out of jc whitney for an 149.95 . my engine is an 77 olds rocket.........so is that an cheap alt or an alright brand.need to know asap because im gonna put my equipment in tommorrow and i might need to upgrade the alt right?" your ganna wanna get an alt that is roughly 120 amps more then your car pulls without a system in it.. so i'd add 100 to the amperage of the factory alt and that is teh size alt you need. other wise you will waste your money... cus teh alt will go out in a year again i recomend a dual battery system give you a lil more bang for your buck and teh batteries balance themselves so you get more bang outta the alt ya use and it relieves teh strain on it. i run a 12 volt dual battery system (batteries run parrallel) dont recomend 24 volt sysem note site: https://www.bitwalla.com/cruisers/articles/24v.html ------------- zonefire317
Posted By: thapimpfromchi
Date Posted: March 22, 2004 at 3:26 AM
Hey skylark, you ever stop and think that maybe the kickers just suck? I have dealt with audiobahn a few times, and they put out all they say, and more. I'd make sure you have it tuned properly, and the boxes are good for the subs. its all in the details man.
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1990 Honda Civic HB:
Clarion DXZ545MP H.U.
2- 6.5" Power Acoustik interiors
Diamond Audio 600.1 amp
Diamond Audio 15" M6MKII
Pyramid PB881X 4 CH. Amp
Posted By: FullForce
Date Posted: March 22, 2004 at 5:10 AM
I would have to agree. Im not running Audiobahn right now but I have in the past. Im all the time changing stuff around, benefits of dealer status. Anyway I still have the stock 100 amp alternator in my car. Dont get me wrong, a bigger alt is the way to go, but not always a must have. Thats where the battery capacity comes in. You pull off of the battery and the alt. Of course the more crap you have running in your car will keep the charging system from recovering as quick. Just for future reference, if anyone wants to check to see what kind of power there amp is making do this. Set your meter to AC volts and read the voltage on the amps outputs with the system turned up to where its hitting as loud as possible. A good test cd is what I use. Take the highest number you read and square it, then divide it by the impedance the amp is seeing. That will be peak power. RMS power is peak power times .707. Example: You read 50 volts. 50 X 50 = 2500. Your amp is seeing a 2 ohm load so 2500/2 = 1250 watts peak. Multiply 1250 X .707 = 883.75 watts RMS.
Posted By: FullForce
Date Posted: March 22, 2004 at 5:13 AM
1 more thing. You will notice the amp will make more or less power depending on the box. You would think that the amp should make the same power but not so. The amp ic CAPABLE of making the same power but some boxes are more efficient than others. The amp will usually make more power in a ported box for this reason.
Posted By: skylark
Date Posted: March 22, 2004 at 10:42 PM
well i hooked it up today and it is loud and perfect. but heres the problems that are going on i have 3 tvs ps2 3 amps one alpine vr for the mids and tweets and the two jbl 1200.bp1 amps. now when i hit low bass notes the deck shuts off. just the deck not the tvs or ps2 so whats wrong. also my battery is dead and i took the car on the freeway and the deck still cut off.....HELP
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goingcrazyonsound
Posted By: skylark
Date Posted: March 23, 2004 at 11:39 AM
i now know what the problem is my belt is loose
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goingcrazyonsound
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