Another Alpine Type-R Sub... will my amp power both?

 

Bronze Member
Username: Bmage29

USA

Post Number: 36
Registered: May-06
Ok.. here's the deal.. I have an JBL BPx1100.1 Amplifier and an Alpine SWR 1242D Subwoofer wired at 2 ohms in a sealed box. I would like to get my car poundin and add another Type-R 1242D sub.

I was asking around best buy and they mentioned that an amp shouldn't have over 80% of it's RMS power used or something like that... otherwise I might risk blowing my amp. I don't know if it's true or not.. but I definatly don't wanna risk blowing my amp. (It's fairly new)

I wanna get both subs wired at 2 ohm and then get a new ported duo box.

Will it be possible to bridge the subs to my one amp.. or will it be too risky and blow my amp?
 

Gold Member
Username: Rovin

Trinidad & T...

Post Number: 8618
Registered: Jul-05
BPX1100.1

Power Output: 334 watts RMS x 2 channel at 4 ohms
and a¤ 1% THD + N

1141 watts RMS x 1 channel at 4 ohms,
14.4V supply and a¤ 1% THD + N

1022 watts RMS x 1 channel at 1 ohm, 14.4V supply and a¤ 1% THD + N

yes u can get another 1242 & run both @ 1 ohm

Upload
 

Bronze Member
Username: Bmage29

USA

Post Number: 39
Registered: May-06
Will a 1 ohm load be kinda tough on my subs? I mean.. how much power will each sub exactly be getting?

Is a 1 ohm load easier than a 2 ohm load on an amp?
And will my amp be pushing too hard? The warranty's only 1 year long.

I can't risk buying another sub or amp.
 

Gold Member
Username: Ctmike

Ct.

Post Number: 1114
Registered: Feb-06
plenty of people run a pair of subs at 1ohm with no problem. looking at those specs each sub will see 511wrms, which is fine.
 

Bronze Member
Username: Bmage29

USA

Post Number: 40
Registered: May-06
Thanks, Just got a little paranoid for a bit.. but I really CAN'T afford to buy new stuff (cause of college) to have it destroyed by a miscalculation..

Ok.. so the subs are running slightly above there specified RMS from alpine.. ok.. that's good. A ported 2 sub box is what I am planning on putting them in.

My amp isn't gonna be on overdrive for the subs... I mean.. 1 ohm should be easier on the amp than a 2 ohm right?

Also is that 80% amp RMS thing true... that an amplifier shouldn't run over 80% of it's RMS while powering subwoofers?

Thanks Again Rovin and ctmike...
 

Gold Member
Username: Ctmike

Ct.

Post Number: 1115
Registered: Feb-06
first, def. go ported with the r's. second, 1ohm load is harder on your amp than a 2ohm load. and i'm still confused on what you mean by the 80% thing, cause i don't know what your saying.
 

Bronze Member
Username: Bmage29

USA

Post Number: 41
Registered: May-06
I don't really know either... I just heard it today from someone at best buy. I think he just meant it as a way to tell if your amp is working too hard


My amp should be ok though.. RIGHT?
 

Gold Member
Username: Rovin

Trinidad & T...

Post Number: 8622
Registered: Jul-05
if a amp is built to handle a 1 ohm load it will do just that confortably

overpowering ur subs by a little bit is NO worry in fact alot of type R owners (including myself) have given these subs just over 600wrms each with no problems

im off 2 bed ...
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