ohm rating

[Zach85 10+ year member]

just a quick question...

if I have two speakers with an ohm rating of 4, 100 RMS each

should I look for an amp with the same RMS rating at the same ohm rating, or will it be ok to get an amp with the same RMS at 2 ohm?

reason I ask is because I could save some money by getting an amp with 100 or 120 RMS at 2 ohm instead of spending more for 100-120 RMS at 4 ohm. Let me know, thanks!

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[revrider1 5,000+ posts]

200 watts @ 2ohms wire them in parallel

 

[revrider1 5,000+ posts]

If you want them in stereo get a 2 channel amp that puts out 100w per channel

 

[Zach85 10+ year member]

200 watts @ 2ohms wire them in parallel

not what I was asking, but thanks...

I just wanted to know if it would still work if I take two 4 ohm speakers and power them up at 2 ohm from the amplifier for more power, instead of it being cut in half at 4 ohm...

i.e. a 180.2 amp... at 4 ohm - 45w x 2

2 ohm - 90w x 2

bridged - 180w x 1

just to imagine I have 2 speakers that are 90 watts RMS each and have an OHM rating of 4, could I still power them up at 2 ohm rating to get the 90 watts RMS rating for the same result, or do I have to find an amp that is 90w x 2 at 4 ohm?

thanks in advance

 

[Zach85 10+ year member]

If you want them in stereo get a 2 channel amp that puts out 100w per channel

at what ohm is what I'm asking. I know to get a 2 channel amp that puts out 100w per channel. Does it matter if it's 2 ohm or 4 ohm if the speakers are 4 ohm?

will I get the same result from 2 ohm as with 4 ohm per channel? thanks

 

[revrider1 5,000+ posts]

not what I was asking, but thanks...
I just wanted to know if it would still work if I take two 4 ohm speakers and power them up at 2 ohm from the amplifier for more power, instead of it being cut in half at 4 ohm...

i.e. a 180.2 amp... at 4 ohm - 45w x 2

2 ohm - 90w x 2

bridged - 180w x 1

just to imagine I have 2 speakers that are 90 watts RMS each and have an OHM rating of 4, could I still power them up at 2 ohm rating to get the 90 watts RMS rating for the same result, or do I have to find an amp that is 90w x 2 at 4 ohm?

thanks in advance

Nope, if you speakers are 4 ohm speakers then that is what the amp will give you at 4ohms. You can not run 4ohm speakers to get a 2ohm power rating. Hope that answers your question, if not hit me again.

 

[Zach85 10+ year member]

Nope, if you speakers are 4 ohm speakers then that is what the amp will give you at 4ohms. You can not run 4ohm speakers to get a 2ohm power rating. Hope that answers your question, if not hit me again.

oh, the amp only runs at the same ohm as the speakers? There isn't a switch or anything to switch between 2 and 4 ohm on the amp? The ohm rating on the speakers determines the ohm rating the Amp runs at?

In that case I have to get an amp with 2 channels at the same RMS rating as the speakers at the same ohm (100w x 2 @ 4 ohm), right?

I can get a little higher RMS on the amp, like 125w x 2 or something, right? let me know, thanks!

 

[revrider1 5,000+ posts]

oh, the amp only runs at the same ohm as the speakers? There isn't a switch or anything to switch between 2 and 4 ohm on the amp? The ohm rating on the speakers determines the ohm rating the Amp runs at?
In that case I have to get an amp with 2 channels at the same RMS rating as the speakers at the same ohm (100w x 2 @ 4 ohm), right?

I can get a little higher RMS on the amp, like 125w x 2 or something, right? let me know, thanks!

1)The way you wire the speakers will depend on the load the amp will produce, as long as it is stable at the presented load. 2)Yes 3)What kind of speakers are they? What is the peak wattage, more than likely you should be fine only giving it 25watts more.

 

[Zach85 10+ year member]

1)The way you wire the speakers will depend on the load the amp will produce, as long as it is stable at the presented load. 2)Yes 3)What kind of speakers are they? What is the peak wattage, more than likely you should be fine only giving it 25watts more.

the speakers are INFINITY REF9603I

RMS: 100w

PEAK: 300w

Ohm: 4

according to what I've gotten from what you've said, I have to get an amp with the following:

RMS: 100-125w x 2 at 4 ohm

I can't go down to 2 ohm then?

 

[revrider1 5,000+ posts]

the speakers are INFINITY REF9603I
RMS: 100w

PEAK: 300w

Ohm: 4

according to what I've gotten from what you've said, I have to get an amp with the following:

 

RMS: 100-125w x 2 at 4 ohm

I can't go down to 2 ohm then?

Yes, you should be fine with 125 watts to each speaker.

 

[revrider1 5,000+ posts]

I dont mean to confuse you,but here we go.

If you were wanting to get a 2ohm load then you will have to put 1 set of speakers per channel, but then you would need 250watts per channel. If you were going to put 1 set per door/panel and parallel them you would then represent a 2ohm load, same with the other door/panel. Then you could run each set to the amp per channel for a 2ohm load per channel. Then you would need a much bigger amp. This is just for example.

 

[Zach85 10+ year member]

I dont mean to confuse you,but here we go.
If you were wanting to get a 2ohm load then you will have to put 1 set of speakers per channel, but then you would need 250watts per channel. If you were going to put 1 set per door/panel and parallel them you would then represent a 2ohm load, same with the other door/panel. Then you could run each set to the amp per channel for a 2ohm load per channel. Then you would need a much bigger amp. This is just for example.

it is confusing trying to figure out what you said there... I'm not much of a science guy, so I'll just ignore this...

Yes, you should be fine with 125 watts to each speaker.

to conclude this post, I will get an amp that is 125w x 2 channels @ 4 ohm since you said that 125w x 2 channels @ 2 ohm will not work. Thanks for your help, I sincerely appreciate it!

 

[revrider1 5,000+ posts]

The only way you will get a 2ohm load per channel is if you wire 2 speakers parellel to one channel.

 

[revrider1 5,000+ posts]

it is confusing trying to figure out what you said there... I'm not much of a science guy, so I'll just ignore this...


to conclude this post, I will get an amp that is 125w x 2 channels @ 4 ohm since you said that 125w x 2 channels @ 2 ohm will not work. Thanks for your help, I sincerely appreciate it!

No problem, I kind of confused myself there after all it is the middle of night.

 

[Zach85 10+ year member]

The only way you will get a 2ohm load per channel is if you wire 2 speakers parellel to one channel.

you can put 2 speakers on 1 channel at 2 ohms? I didn't know that was possible... how would I do that? just connect the (+) and (-) from both speakers together and connect them to the one channel's terminal? would that affect the quality of the sound at all, and would I have to get a higher RMS rating to do that or anything?

I guess we didn't conclude the post just yet haha

I'm going to bed since I've been up all night and it's about 5:20 here... need my sleep. I'll continue this conversation when I wake up or later in the day. Thanks for all your help!