amp question
04-12-2007, 09:49 PM
#1
Guest
Posts: n/a
amp question
I'm looking to buy an amp to power my 2 P110S8 subwoofers. They are 150 Watts RMS each. So to my understanding i require an amp with 300 Watts RMS power. I was told by the man at JB's Power center that i should run them at 2 Ohms. 300 W RMS X 2 @ 2ohms. OR something like this?
So if i'm looking at this amp, what i'm having trouble understanding is how i am supposed to match these specifications to my subs?
100W x 2 @ 4-Ohms RMS
225W x 2 @ 2-Ohms RMS
450W x 1 @ 4-Ohms bridged RMS
How does a 450W amp, only give 100W of power?
Is their a setting/switch on the amp to switch them between 2/4 ohms?
When it says 225W x 2 @ 2 ohms does that mean its giving 225W to each sub, or both?
Please help me, i am new to car audio and i am tyring to make sense of this to match things up so i can buy a new system.
EDIT:
After Claude (Financial Payer) took a look at the amps, to his "knowledge" he decided the amp i should buy is this one. Is this going to power my subs to their full potential, or just half of what their capable of?
So if i'm looking at this amp, what i'm having trouble understanding is how i am supposed to match these specifications to my subs?
100W x 2 @ 4-Ohms RMS
225W x 2 @ 2-Ohms RMS
450W x 1 @ 4-Ohms bridged RMS
How does a 450W amp, only give 100W of power?
Is their a setting/switch on the amp to switch them between 2/4 ohms?
When it says 225W x 2 @ 2 ohms does that mean its giving 225W to each sub, or both?
Please help me, i am new to car audio and i am tyring to make sense of this to match things up so i can buy a new system.
EDIT:
After Claude (Financial Payer) took a look at the amps, to his "knowledge" he decided the amp i should buy is this one. Is this going to power my subs to their full potential, or just half of what their capable of?
Last edited by DaGGeR_2007; 04-12-2007 at 10:12 PM.
04-12-2007, 10:16 PM
#2
are the subs 2 or 4 ohms?
1 or 2 VC ?
if it is 2 vc are the vc 1 or 2 ohms
an amp if it was made to do 2 ohms will by how you wire it not a switch
at 2ohms is 225 not 450
When it says 225W x 2 @ 2 ohms does that mean its giving 225W to each sub, or both?
so each sub is getting 112 to each sub
1 or 2 VC ?
if it is 2 vc are the vc 1 or 2 ohms
an amp if it was made to do 2 ohms will by how you wire it not a switch
at 2ohms is 225 not 450
When it says 225W x 2 @ 2 ohms does that mean its giving 225W to each sub, or both?
so each sub is getting 112 to each sub
04-12-2007, 10:19 PM
#3
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my subs are a wopping technologically advanced 8 ohms...
i think vc means voice coil, they are 1.5mm
so do i got this right now:
If i wire my subs Bridged with a resistance of 4 Ohms... (which means i have two wires -/+ to connect to the amp right?) and i hook them up. With the amp Claude decided to purchase i will be getting 175W x 1 @ 4-Ohms RMS
so does that mean i'm getting 87W to each sub?
Thats too low than, i'm aiming for 150W RMS correct?
i think this is starting to make sense now..
I could wire the subs - to -, + to + and have it bridged, which would make a resistance of 2 ohms, so than i would be getting 325W x 1 @ 2-Ohms RMS giving me just a bit more power than i need?
i think vc means voice coil, they are 1.5mm
so do i got this right now:
If i wire my subs Bridged with a resistance of 4 Ohms... (which means i have two wires -/+ to connect to the amp right?) and i hook them up. With the amp Claude decided to purchase i will be getting 175W x 1 @ 4-Ohms RMS
so does that mean i'm getting 87W to each sub?
Thats too low than, i'm aiming for 150W RMS correct?
i think this is starting to make sense now..
I could wire the subs - to -, + to + and have it bridged, which would make a resistance of 2 ohms, so than i would be getting 325W x 1 @ 2-Ohms RMS giving me just a bit more power than i need?
Last edited by DaGGeR_2007; 04-12-2007 at 10:23 PM.
04-12-2007, 10:58 PM
#4
If each woofer has a single 8ohm coil then you can put them in parallel for a 4ohm load........ look for an amp that does 300+ watts into 4ohms......... there are many 2ch amp to choose from that will run 4ohms bridged and put out that amount of power.......
IF they are dual 8ohm subs then you can wire all coils in parallel for 2ohms OR run a 4ch amp bridged to 2 4ohm stable channels and run 1 woofer on each......
If you still don't understand you better google 'basic car audio' and start reading the first site that comes up......
IF they are dual 8ohm subs then you can wire all coils in parallel for 2ohms OR run a 4ch amp bridged to 2 4ohm stable channels and run 1 woofer on each......
If you still don't understand you better google 'basic car audio' and start reading the first site that comes up......
04-12-2007, 11:39 PM
#5
After looking at that amp and based on the subs that you have presently, that amp will deliver 175w rms into 4 ohms. With your two 8 ohm subs wired in a parallel circuit, this means that the 175w is going to be split equally into the two subs, giving them 87.5 w each. Not the best choice of amp to subs.
(1) are these subs going to be a long term keeper or something to get you by for now?
(2) do you know what a parallel circuit is?
(1) are these subs going to be a long term keeper or something to get you by for now?
(2) do you know what a parallel circuit is?
04-13-2007, 09:05 AM
#6
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Posts: n/a
These subs are gonna be with me until late february probably, so i wanna get an amp thats powerful enough to make them work their hardest. And yes, i do know what a parallel circuit is.
So according to you guys i should be getting an amp that does
300+W x 1/2 @ 4 Ohms
which is what i thought in the first place, but my dad seems to think he knows more than anyone...
Here are a few options i have been suggested my car audio retail stores, which one is the best bang for my buck?
RF Punch P325.2
80W x 2 @ 4-Ohms RMS
160W x 2 @ 2-Ohms RMS
325W x 1 @ 4-Ohms bridged RMS
Kenwood Excelon KAC-X522
2 x 165 Watts RMS @ 4 ohms CEA-2006 rating ?
2 x 254 Watts RMS @ 2 ohms CEA-2006 rating
Clarion APX-1300
1-channel x 300 watts into 4 ohms, 20Hz-20kHz @ < 0.1%THD
1-channel x 400 watts into 2 ohms, 20Hz-20kHz @ < 0.1%THD
To me the clarion looks like the best bang for your buck if i run my subs parallel, am i correct on this?
So according to you guys i should be getting an amp that does
300+W x 1/2 @ 4 Ohms
which is what i thought in the first place, but my dad seems to think he knows more than anyone...
Here are a few options i have been suggested my car audio retail stores, which one is the best bang for my buck?
RF Punch P325.2
80W x 2 @ 4-Ohms RMS
160W x 2 @ 2-Ohms RMS
325W x 1 @ 4-Ohms bridged RMS
Kenwood Excelon KAC-X522
2 x 165 Watts RMS @ 4 ohms CEA-2006 rating ?
2 x 254 Watts RMS @ 2 ohms CEA-2006 rating
Clarion APX-1300
1-channel x 300 watts into 4 ohms, 20Hz-20kHz @ < 0.1%THD
1-channel x 400 watts into 2 ohms, 20Hz-20kHz @ < 0.1%THD
To me the clarion looks like the best bang for your buck if i run my subs parallel, am i correct on this?
04-13-2007, 12:42 PM
#7
Consider if you are going to be changing to say a pair of 4 ohms subs down the road. If you are going to be, consider a amp like the original Rockford that you were looking at, just it's bigger brother. Buy your amp once, not twice. If it is a case of budgeting, any of the amps listed will do the job. If you really want some power, I have one Pioneer Premiere amp that will do the job for you now and in the future. Interested, drop me a PM.
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