Use All Outputs??

[Mixophrenia 10+ year member]

hey guys say i have a 4 channel amp puttin out 40x4 @ 4 ohms and 80x4 @ 2 ohms... ifi wanna run it at 2 ohms, can i just use two out of the 4 outputs and still get the 80 watts per channel??? or do i have to use all 4 outputs to get the 80x4??

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[desi_daru 10+ year member]

if u can wire the speakers to 2ohm and only wanna use 2 channels thas fine, im currently running a 4ch but only using the 2 front channels the rears are unused

 

[nosaj070 10+ year member]

Well are you powering speakers or subs? if speakers, you should bridge them (one bridged channel per speaker) Just keep the gains down. If its subs, it all depends on the vc config of it.

 

[Mixophrenia 10+ year member]

if u can wire the speakers to 2ohm and only wanna use 2 channels thas fine, im currently running a 4ch but only using the 2 front channels the rears are unused

thanks... that's all i needed to know...

 

[Mixophrenia 10+ year member]

hey guys i have a 4 channel amp running 4 speaker each @ 4 ohms... the amp runs 40x4@4 and 80x4@2... is there any way to wire these speaker to get the 2 ohm load per speaker?? can i just buy 4 ohm resistors and make them act like a speaker to wire in parallel and get the 2 ohms load?? any other ideas??

 

[NostradamUs 10+ year member]

hey guys i have a 4 channel amp running 4 speaker each @ 4 ohms... the amp runs 40x4@4 and 80x4@2... is there any way to wire these speaker to get the 2 ohm load per speaker?? can i just buy 4 ohm resistors and make them act like a speaker to wire in parallel and get the 2 ohms load?? any other ideas??

The reason you don't want to use a 4ohm resistor is because it's only a 1/4w most likely and chances are you want to run more then a quarter watt to your speakers..

 

[maylar 10+ year member]

hey guys i have a 4 channel amp running 4 speaker each @ 4 ohms... the amp runs 40x4@4 and 80x4@2... is there any way to wire these speaker to get the 2 ohm load per speaker??

No.

can i just buy 4 ohm resistors and make them act like a speaker to wire in parallel and get the 2 ohms load??

Sure, but resistors don't make sound, just heat.

any other ideas??

Add more speakers.

 

[helotaxi 5,000+ posts]

can i just buy 4 ohm resistors and make them act like a speaker to wire in parallel and get the 2 ohms load?? any other ideas??

You could do this, but you will not get any benefit from it. Here's why:

The amp will see a 2 ohm load and will produce 80watts per channel, but that power will be split between the loads on that circuit. In the case you mentioned the speaker would get 40 watts (no improvement over running it at 4 ohms) and the resistor will be turning 40 watts into heat. Basically you will be heating up the amp and the resistor for no benefit.

If you have four speakers to run, run each speaker on its own channel of the 4 channel amp. That's the most power you will be able to get to your 4 ohm speakers from that amp.

 

[Mixophrenia 10+ year member]

the amp also runs in 2x160@4 ohms... can i bridge the speakers into a 2 ohm load?? cuz i never see bridged amps running at 2 ohms, only 4 ohms...

 

[NostradamUs 10+ year member]

Most all amps can only be bridged into 4ohms.

 

[Mixophrenia 10+ year member]

if i try to bridge 'em... the amp will just shut off if it's not right, right?? nothing will burn up or anything will it??

 

[NostradamUs 10+ year member]

if i try to bridge 'em... the amp will just shut off if it's not right, right?? nothing will burn up or anything will it??

Well theoretically yes, but FYI that doesn't always happen, i had a legacy 1000wmax amp and i ran it bridged in 2Ohm and i blew a MOSFET and had to replace it. (lasted bridged at 2Ohm for about 3minutes.)

 

[Mixophrenia 10+ year member]

hmm... interesting... i wonder if i can run it bridged at 2 ohm... cuz that's a legacy dude...

 

[NostradamUs 10+ year member]

I understand legacy's are shit.. but again i'm just telling you my experiences.. although it's true that not many amps can be bridged at 2ohm stable. So do what you want.

 

[Mixophrenia 10+ year member]

thanks for your input man