amp question
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amp question
I just got my 2 12 inch jl audio w1's yeah there old school but still pound now can i run a 2 channel amp to power the 2 of them and how much watts do i need on a amp to power them it says these subs can handle 250 watts each?
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Re: amp question
Originally posted by BigJohn
I just got my 2 12 inch jl audio w1's yeah there old school but still pound now can i run a 2 channel amp to power the 2 of them and how much watts do i need on a amp to power them it says these subs can handle 250 watts each?
I just got my 2 12 inch jl audio w1's yeah there old school but still pound now can i run a 2 channel amp to power the 2 of them and how much watts do i need on a amp to power them it says these subs can handle 250 watts each?
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Most companies advertise the peak power of any of their products, not the RMS, so 250 is most likely the peak. I would go with 2 mono amps instead of 1 2 channel amp though.
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Originally posted by Del
Most companies advertise the peak power of any of their products, not the RMS, so 250 is most likely the peak. I would go with 2 mono amps instead of 1 2 channel amp though.
Most companies advertise the peak power of any of their products, not the RMS, so 250 is most likely the peak. I would go with 2 mono amps instead of 1 2 channel amp though.
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i have two rockford fosgate HX2 12's , they are heavy duty , high quality subs and they hit hard with my fosgate 250x2 watt RMS amp. anything more than that is excessive in my opinion unless you are doing 15s or something crazy like that. these people that say they are running 1000 watts to thier subs are either feeding them way too much power or are quoting the MAX power output anyway, id have to check but id assume my 500 watt RMS amp puts out nearly 1000 watts max
im pretty sure when a company says a speaker can "handle 250 watts" they are refferring to RMS anyway and i wouldnt recommend exceeding that
im pretty sure when a company says a speaker can "handle 250 watts" they are refferring to RMS anyway and i wouldnt recommend exceeding that
Last edited by NCSU-4runner; 06-11-2003 at 05:54 PM.
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Originally posted by NCSU-4runner
i have two rockford fosgate HX2 12's , they are heavy duty , high quality subs and they hit hard with my fosgate 250x2 watt RMS amp. anything more than that is excessive in my opinion unless you are doing 15s or something crazy like that. these people that say they are running 1000 watts to thier subs are either feeding them way too much power or are quoting the MAX power output anyway, id have to check but id assume my 500 watt RMS amp puts out nearly 1000 watts max
im pretty sure when a company says a speaker can "handle 250 watts" they are refferring to RMS anyway and i wouldnt recommend exceeding that
i have two rockford fosgate HX2 12's , they are heavy duty , high quality subs and they hit hard with my fosgate 250x2 watt RMS amp. anything more than that is excessive in my opinion unless you are doing 15s or something crazy like that. these people that say they are running 1000 watts to thier subs are either feeding them way too much power or are quoting the MAX power output anyway, id have to check but id assume my 500 watt RMS amp puts out nearly 1000 watts max
im pretty sure when a company says a speaker can "handle 250 watts" they are refferring to RMS anyway and i wouldnt recommend exceeding that
#7
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No, don't go with a 4 channel amp unless you are trying to push mids and highs as well. Go grab a decent class A/B amp in the 400-500 watt range that way when you upgrade you can throw a decent 300+ watts on mids and highs. Those JL's are a tad underrated as well. (They will take more than that.) However be aware that the power rating is box dependant....
Del, sorry but that is incorrect. Most reputible companies only publish RMS values and on occasion, the peak. Peak means nothing.
Del, sorry but that is incorrect. Most reputible companies only publish RMS values and on occasion, the peak. Peak means nothing.
Last edited by Bumpin' Yota; 06-11-2003 at 05:58 PM.
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Bumpin' Yota
is correct if there is only one number on them its max power which is a marketing pile of bull˟˟˟˟.
bigjohn do you know if there the 4ohm or 8 ohm versions??
here are the specs on you subwoofers
http://www.jlaudio.com/subwoofers/pdfs/12W1_BDS.pdf
it depends on your impedances before i can give a recommendation. but a class a/b amp that pushes 250 rms would cover it but i cant say without the impedances cause you need to match that up with the output of the amplifier. Your subs can only take 125 watts rms.
Chris
is correct if there is only one number on them its max power which is a marketing pile of bull˟˟˟˟.
bigjohn do you know if there the 4ohm or 8 ohm versions??
here are the specs on you subwoofers
http://www.jlaudio.com/subwoofers/pdfs/12W1_BDS.pdf
it depends on your impedances before i can give a recommendation. but a class a/b amp that pushes 250 rms would cover it but i cant say without the impedances cause you need to match that up with the output of the amplifier. Your subs can only take 125 watts rms.
Chris
Last edited by impulsebrklyn; 06-11-2003 at 06:08 PM.
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Originally posted by impulsebrklyn
Bumpin' Yota
is correct if there is only one number on them its max power which is a marketing pile of bull˟˟˟˟.
bigjohn do you know if there the 4ohm or 8 ohm versions??
here are the specs on you subwoofers
http://www.jlaudio.com/subwoofers/pdfs/12W1_BDS.pdf
it depends on your impedances before i can give a recommendation. but a class a/b amp that pushes 250 rms would cover it but i cant say without the impedances cause you need to match that up with the output of the amplifier. Your subs can only take 125 watts rms.
Chris
Bumpin' Yota
is correct if there is only one number on them its max power which is a marketing pile of bull˟˟˟˟.
bigjohn do you know if there the 4ohm or 8 ohm versions??
here are the specs on you subwoofers
http://www.jlaudio.com/subwoofers/pdfs/12W1_BDS.pdf
it depends on your impedances before i can give a recommendation. but a class a/b amp that pushes 250 rms would cover it but i cant say without the impedances cause you need to match that up with the output of the amplifier. Your subs can only take 125 watts rms.
Chris
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Originally posted by impulsebrklyn
yeah it shoudl say it somewhere. look for a 4 or an 8 with like an uppside down u with feet. its on the pdf file i posted.
Chris
yeah it shoudl say it somewhere. look for a 4 or an 8 with like an uppside down u with feet. its on the pdf file i posted.
Chris
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its the impedance of the sub, without knowing what it is there is no way to correctly wire them. I think you can check them with a multi-meter but im unsure.
Chris
Chris
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Originally posted by impulsebrklyn
its the impedance of the sub, without knowing what it is there is no way to correctly wire them. I think you can check them with a multi-meter but im unsure.
Chris
its the impedance of the sub, without knowing what it is there is no way to correctly wire them. I think you can check them with a multi-meter but im unsure.
Chris
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Meters
If it comes down to it, take it into a car stereo shop and ask them to meter it. If they charge you tell them to screw themselves. Or if you have a multi-meter or ohm-meter laying around, you could do it. It's pretty straight forward with those things. Set the multi-meter to ohms and then connect the positive to the positive and the negative to the negative. 4 ohms is 4 ohms, 8 is 8. If you don't read anything, switch the leads around. If you still don't read anything, you're screwed -- your sub is blown, but I doubt that will be the case. :pat:
Zach
Zach
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Most companies publish their peak values, not RMS. JL is one of the few companies that publishes their RMS values, and they are very conservative with those numbers. My JL 500/1 amp is supposedly 500 RMS, yet many independant companies have tested the amps to find that they run between 600-733 watts RMS.
HOWEVER..... the W1 is rated at 125 watts RMS.
http://www.jlaudio.com/subwoofers/pdfs/12W1_BDS.pdf
If you ever have questions about JL products, just check their site. They have extensive information on all their products. Even the discontinued ones
HOWEVER..... the W1 is rated at 125 watts RMS.
http://www.jlaudio.com/subwoofers/pdfs/12W1_BDS.pdf
If you ever have questions about JL products, just check their site. They have extensive information on all their products. Even the discontinued ones
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bigjohn is that 4 total between the two woofers or for each woofer????? it makes a difference im assuming total cause they dont make dual 8ohm subs
2 4ohm subs would wire to 2ohm or 8 ohm(cant wire to 8ohm for car amplifier dont run at this impedance)
2 8ohm subs would wire to 4ohm only
so without knowing the impedance of the subs you wont know what they can be wired to, so then you cant find an amp that pushes the 250 watts at that desired impedance
go to radio shack you can get a multi-meter for less then 10 bucks, maybe they will be nice and let you use one of the displays.
Chris
2 4ohm subs would wire to 2ohm or 8 ohm(cant wire to 8ohm for car amplifier dont run at this impedance)
2 8ohm subs would wire to 4ohm only
so without knowing the impedance of the subs you wont know what they can be wired to, so then you cant find an amp that pushes the 250 watts at that desired impedance
go to radio shack you can get a multi-meter for less then 10 bucks, maybe they will be nice and let you use one of the displays.
Chris
Last edited by impulsebrklyn; 06-11-2003 at 08:29 PM.
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Originally posted by impulsebrklyn
bigjohn is that 4 total between the two woofers or for each woofer????? it makes a difference im assuming total cause they dont make dual 8ohm subs
2 4ohm subs would wire to 2ohm or 8 ohm(cant wire to 8ohm for car amplifier dont run at this impedance)
2 8ohm subs would wire to 4ohm only
so without knowing the impedance of the subs you wont know what they can be wired to, so then you cant find an amp that pushes the 250 watts at that desired impedance
go to radio shack you can get a multi-meter for less then 10 bucks, maybe they will be nice and let you use one of the displays.
Chris
bigjohn is that 4 total between the two woofers or for each woofer????? it makes a difference im assuming total cause they dont make dual 8ohm subs
2 4ohm subs would wire to 2ohm or 8 ohm(cant wire to 8ohm for car amplifier dont run at this impedance)
2 8ohm subs would wire to 4ohm only
so without knowing the impedance of the subs you wont know what they can be wired to, so then you cant find an amp that pushes the 250 watts at that desired impedance
go to radio shack you can get a multi-meter for less then 10 bucks, maybe they will be nice and let you use one of the displays.
Chris
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If you just want an amp for the subs, best thing to do is buy a Class-D Monoblock amp. It will be one channel only, which is what you want for subs. As far as the speakers go, wire them in parallel, but coils in series. You are going to have to shell out big money to get a 1 ohm stable amp, but, by wiring the coils in series, then the subs in parallel, you will be running 4ohm, which isn't too bad...
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Originally posted by OneTrickToy
If you just want an amp for the subs, best thing to do is buy a Class-D Monoblock amp. It will be one channel only, which is what you want for subs. As far as the speakers go, wire them in parallel, but coils in series. You are going to have to shell out big money to get a 1 ohm stable amp, but, by wiring the coils in series, then the subs in parallel, you will be running 4ohm, which isn't too bad...
If you just want an amp for the subs, best thing to do is buy a Class-D Monoblock amp. It will be one channel only, which is what you want for subs. As far as the speakers go, wire them in parallel, but coils in series. You are going to have to shell out big money to get a 1 ohm stable amp, but, by wiring the coils in series, then the subs in parallel, you will be running 4ohm, which isn't too bad...
Last edited by BigJohn; 06-12-2003 at 11:44 AM.
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i cant make any recommendations on amplifiers till you find out the subs impedances. if you dont know what your hooking up to you have a decent chance of ruinning the amp or the subs. and you want a mono a/b amplifier or a class D that would be best.