my my a/b US amps vs. buying a class d US amp?

[Mass Car Audio 10+ year member]

I have a Crossfire BMF1000d that heats up faster at 4 ohms than it does at 1. It is also a current hog and draws just as much juice at 1 ohm as my 25 to Life Punch 150 does at 4!//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

No amplifier should not heat up more at 4 ohm than at 1 ohm. It sounds like that amp has a poor circuit layout design.

 

[Grinder1989 5,000+ posts]

That doesn't make any sense. You're drawing less current @ 4 ohms.....

 

[gunz4me 10+ year member]

No amplifier should not heat up more at 4 ohm than at 1 ohm. It sounds like that amp has a poor circuit layout design.

That doesn't make any sense. You're drawing less current @ 4 ohms.....

It was no hotter at 4 ohms than at 1, it just managed to heat up faster at 4 ohms. Truth be told, it kind of goes against everything I ever learned regarding power amplifiers. At 4 ohms it is further away from a theoretical short, drawing less current, and outputting less power, yet it warms up faster.

I need to repeat the test though because I am thinking that my ground may have been the culprit as to why it heated up faster at 4. Another theory offered by one of my tech buddies was that the amplifier VI limits itself more at 1 ohm than 4 ohms, but I am not really buying that explanation either.

 

[Grinder1989 5,000+ posts]

It was no hotter at 4 ohms than at 1, it just managed to heat up faster at 4 ohms. Truth be told, it kind of goes against everything I ever learned regarding power amplifiers. At 4 ohms it is further away from a theoretical short, drawing less current, and outputting less power, yet it warms up faster.
I need to repeat the test though because I am thinking that my ground may have been the culprit as to why it heated up faster at 4. Another theory offered by one of my tech buddies was that the amplifier VI limits itself more at 1 ohm than 4 ohms, but I am not really buying that explanation either.

Strange. Oh well.