View Full Version : amp with dual subs question
nofatchickscarwillscrape
07-28-2010, 09:38 AM
k the amp i have is a 2/1 channel sonny that delivers 1200 watts peak power at 4 ohms; 202 watts x 2 RMS into 4 ohms or 500 watts x 1 RMS into 4 ohms.
I want to run 2 10inch subs from it..what ohmage of subs would i buy to get max power and how would i run them?
thanks nerds!
bluesteel17
07-28-2010, 07:39 PM
msg shon
if you want a pair you would want 2 single voice coil 4ohm or 2 dual voice coil 2 ohm
if you are going single, you want a dual 4 ohm.
nofatchickscarwillscrape
07-29-2010, 07:33 AM
thanks man, appreciated and repped
RobertGoulet
07-29-2010, 08:07 AM
Yeah thats not really right. As most amplifiers will put out slightly more power while bridged, running two subs that are D2 ohm would give you these final options
1 Ohm
8 Ohm
Neither of these are of use to you. I think his plan was for you to run them on seperate channels. You can do that but will lose a bit of power. What you want is 2 Dual 4 subs,
That gives you
4 Ohm
16 Ohm
Or if wired alone, 2 ohm ( great for most monoblocks ).
Ideally you want to run a 4 ohm mono load. 2 single coil 2 ohm subs wired in series will do this or if you go dual coil get 4 ohm and wire each coil in parallel to get a 2 ohm load per sub then wire those in series.
Yeah thats not really right. As most amplifiers will put out slightly more power while bridged, running two subs that are D2 ohm would give you these final options
1 Ohm
8 Ohm
Neither of these are of use to you. I think his plan was for you to run them on seperate channels. You can do that but will lose a bit of power. What you want is 2 Dual 4 subs,
That gives you
4 Ohm
16 Ohm
Or if wired alone, 2 ohm ( great for most monoblocks ).
incorrect... series parallel would have produced a 2 ohm load.
4sc. Your scenario can only produce the following.
2 single voice coil 4ohms - 2ohms or 8ohms bridged or 4ohms x2 in stereo. He needs a 4ohms bridged setup to get the most power.
Same thing with a a single 4ohm dual voice coil. RobertGoulet is right.
He needs what I said above.
Grabber
07-29-2010, 10:47 AM
unce unce unce unce
4sc. Your scenario can only produce the following.
2 single voice coil 4ohms - 2ohms or 8ohms bridged or 4ohms x2 in stereo. He needs a 4ohms bridged setup to get the most power.
Same thing with a a single 4ohm dual voice coil. RobertGoulet is right.
He needs what I said above.
the only thing that hasnt confused me about this thread is how Tim has miraculously turned this about him. pm me dude.
Fuck you midget! You know I'm right.
4sc. Your scenario can only produce the following.
2 single voice coil 4ohms - 2ohms or 8ohms bridged or 4ohms x2 in stereo. He needs a 4ohms bridged setup to get the most power.
Same thing with a a single 4ohm dual voice coil. RobertGoulet is right.
He needs what I said above.
incorrect... again... look up series parallel wiring, then respond credibly.
incorrect... again... look up series parallel wiring, then respond credibly.
I don't need to look shit up.
2 4ohm loads wired in series produces an 8ohm load. Wired in parallel it produces a 2 ohm load.
What ever rating the speakers are in series it doubles it and in parallel it divides it (numerically speaking). No wonder people keep blowing things ups.
Anything else junior?
Here you go 4sc. Read up.
http://www.bcae1.com/spkrmlti.htm
RobertGoulet
07-30-2010, 08:40 AM
the only thing that hasnt confused me about this thread is how Tim has miraculously turned this about him. pm me dude.
I just hope he get's the right subs.....
He will if he goes to see shon and doesn't listen to 4sc.
nofatchickscarwillscrape
07-30-2010, 11:08 AM
pm sent
I don't need to look shit up.
2 4ohm loads wired in series produces an 8ohm load. Wired in parallel it produces a 2 ohm load.
What ever rating the speakers are in series it doubles it and in parallel it divides it (numerically speaking). No wonder people keep blowing things ups.
Anything else junior?
i agree completely, however we are speaking of dual voice coil subwoofers. therefore, if you have a total of 4, 2ohm voice coils , you can wire them in both series and parallel at the same time producing an impedance equal to that of one single voice coil.
good enough pops?
Junior.
Listen up as the teacher is speaking.
The amp he has needs a 4ohm mono load.
If you have 1 sub with 2 2ohm coils that sub can run in either 1ohm or 4ohm. So now if you have 2 of these speakers you can get either a .5ohm load, 2ohm load or an 8ohm load. You can't get a 4ohm load with 2 dual voice coils that are 2 ohm!
Please explain to me how you would get a 4ohm load from 4 2ohm coils. Series? That's 8ohms. Parallel? That's .5ohms. Series parallel? That's 2ohm. Series series? That's 8ohm. Parallel parallel? That's .5ohm. Parallel series? That's 2ohm.
Class dismissed.
since when does that amp need a 4ohm load? unless you want it to run at half of the terrible class a/b efficiency that it already has...
since when does that amp need a 4ohm load? unless you want it to run at half of the terrible class a/b efficiency that it already has...
k the amp i have is a 2/1 channel sonny that delivers 1200 watts peak power at 4 ohms; 202 watts x 2 RMS into 4 ohms or 500 watts x 1 RMS into 4 ohms.
I want to run 2 10inch subs from it..what ohmage of subs would i buy to get max power and how would i run them?
thanks nerds!
What was your plan? I would not run that amp at 2ohms.
thats you... I wouldnt run it at anything below 2, sony has had 2 ohm stable amplifiers since they started conforming with cea ratings.
So you would take an amp that states the ratings he posted and run it at 2ohm mono even if it only states 4ohm mono? That's bad info considering you have no idea what amp he has or how old it is. He asked a specific question with a specific rating and you gave him the wrong info. It's not an issue of what you or I would do.
SHOmethemoney
08-02-2010, 07:40 PM
I'm with Whosit on this one. I wouldn't run an amp with a lower load than specified unless you like replacing amplifiers often.
Back when I was into audio (1997-2001), the Rockford Fosgate amps of the day (most of them any way) weren't 2 ohm stable when bridged and guys would run them like that and then would come asking why their amps were working after a while.
thats you... I wouldnt run it at anything below 2, sony has had 2 ohm stable amplifiers since they started conforming with cea ratings.
cea ratings are gay!
rate your amps at 20 to 20k hz with less than .01 THD..also post damping factors of amps..like Zapco and other great products
Cea rates at1%. too high
cea ratings are gay!
rate your amps at 20 to 20k hz with less than .01 THD..also post damping factors of amps..like Zapco and other great products
Cea rates at1%. too high
I agree.. theres a lot left out with cea, but at least its a base-line.
SHOmethemoney
08-03-2010, 08:09 PM
cea ratings are gay!
rate your amps at 20 to 20k hz with less than .01 THD..also post damping factors of amps..like Zapco and other great products
Cea rates at1%. too high
Might as well publish the 1% THD results because 99.99% of people (myself included) can't tell the difference between 0.0001% and 1%. And publishing 1% THD power output looks better for marketing.
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