4 ohm vs. 1 ohm efficency. which is better??

[OoMesKoO 10+ year member]

Here's the dillemma. I was thinking about running 2 MTX 1501Ds strapped @ 4 ohms... would that be better than running a 3kw mono @ 1 ohm?

Audiopipe AP30001d to be exact.

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[hoxie08 5,000+ posts]

idk

 

[80INCHES 5,000+ posts]

i rather have it strapped at 4ohms cuz it will have slightly less strain on ur electrical

80

 

[IgnoreMe 5,000+ posts]

usually running amps at higher ohm loads results in a higher efficiency. but i mean if the 3000 watter is more efficient than the 2 1500 watters, even at a lower ohm load then i would go with the 3kw amp.

it depends, but CHANCES are that the ones ran at 2 ohms will be better off than the one ran at 1 ohm.

 

[n2audio 5,000+ posts]

is this a TE1501D?

At 4 ohms strapped you'd be getting a rated 2000w total from the MTX's, right?

vs 3000 from the other amp?

Seems to be a bigger issue than efficiency.

 

[OoMesKoO 10+ year member]

I'm planning on the old... 2000 model 1501ds... 1500w @ 2.. 14.4v.

Strapped.... close to 3kw @ 4 ohms... vs 3kw @ 1 ohm.

 

[n2audio 5,000+ posts]

I've never known MTX to have unusually efficient amps.

Without a very thorough bench test I really don't think there's any way to know which would be more efficient.

I do know MTX's are conservatively rated, so if the other amp is closer to accurate, or over-rated it may be less of a strain to your alternator even if it's just middle of the road in efficiency.

I know I've seen efficiencies on some cheaper class D's in the 80's at min impedance and some higher end D's around 70 at higher than min. impedance.

 

[OoMesKoO 10+ year member]

Hmmmm..

What to do what to do.