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what is my wattage

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=83352
Printed Date: May 10, 2025 at 12:31 PM


Topic: what is my wattage

Posted By: jburton_55
Subject: what is my wattage
Date Posted: September 25, 2006 at 11:00 PM

i am unclear of the advatages of bridging my amp...i have a jl audio 1000/1 and 3 jl audio 12w6s....the amp is rated at 1000 W RMS @ 1.5 ohm - 4 ohm.....does the watts go up when you run your subs at a lower ohm or will it make a difference with my amp.....my subs a rated at 400 watts Thermal Power Handling.... does this mean 400 watts RMS?   I want to give my subs full power so will my amp run them at there full power or should i get anouther amp and run 2 or them off one amp and 1 off anouther amp like there 500/1.....please help me clear this up.....also i know how ohms law works but i am not sure about watts and RMS, if someone could clear this up for me.....thanks  




Replies:

Posted By: aznboi3644
Date Posted: September 25, 2006 at 11:33 PM
Um...the JL slash series put out FULL POWER between 1.5-4 ohms...no need to worry




Posted By: jburton_55
Date Posted: September 26, 2006 at 2:43 AM
so it does not matter what ohms i run the subs at, they will be the same wattage at 1.5-4ohms?




Posted By: jlord16
Date Posted: September 26, 2006 at 4:18 AM
the amp will provide the same wattage over that range of resistance, so the three subs will receive about 330watts each if they are wired together at anywere between 1.5 and 4 ohms resistance

-------------
Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*




Posted By: jvillefinest
Date Posted: September 26, 2006 at 9:34 AM
you probably wouldnt notice a large amount of difference if you did add the 500/1 but if you want to get the maximum out of your subs....go for it they will handle it. Just make sure to have the battery power to keep up with the amps

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2007 Acura TSX
SQ setup in the works




Posted By: bellsracer
Date Posted: September 26, 2006 at 11:44 AM

Or better yet, get your alternator upgraded to work with it.

You'll want at least 155 amp alternator to let this system hit hard continuously. Batteries will give you hard hits too, but only for a limited time. For example, say you have an 80 amp alternator and 665 CCA battery (this is average for stock setups) you'll be able to hit for 15 seconds at full power before your battery becomes drained and deep cycles. After that it can only go for about 10 seconds and the battery might only be able to get to 9-10 volts. This is assuming you also get the 500/1 as well.

If you run without the 500/1 then upgrade to at least 125 amp alternator. Running average factory setup without the 500/1 will give you about 17-18 seconds at full power before deep cycle starts to set in.

Good Luck!



-------------
Never send your ducks to eagle school.
The difference between ordinary and extraordinary is that little extra.
The 3Ls of life: Learn from the Past, Live for the Present, Look to the Future.




Posted By: jburton_55
Date Posted: September 26, 2006 at 8:52 PM
i have a 200 amp alternater and a optamia red top so my amps will be good....i just dont know what the wattage will be at each sub.....and what the real advatage of runnig the amp at a lower ohm....i know the current will go up but does it effect the the wattage?




Posted By: jlord16
Date Posted: September 26, 2006 at 9:09 PM
P=VI,  Wattage=Volts*Current and P=v^2/R, Volts squaRED / resistance.  Power will increase as your amperage or voltage increase or if your resistance decreases.  If you use the 1000/1 on the three subs then each sub will get equall wattage (~330 watts) if you used a 1000/1 and a 500/1, then each sub would get 500watts.  Becasue JL amps are "throttled" they produce constant power requardless of the subs resistance.  If you go below 1.5ohm you run the risk of frying your amp, or sending it into protection mode.

-------------
Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*





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