amp size/power rating?

[The Camry]

ive been curious. Some amps that give say 100x4 are absolutely huge. Something along the lines of PPI or sundown 100.4, yet some amps that give a ton of power arent even close to being that big like my sundown 150.4

Whats the reason behind that?

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[CerwinVega_Fan 10+ year member]

Different board designs.

 

[Boominburban]

^^This^^ and some are class A/B vs some are class "D" .

 

[gstokes]

ive been curious. Some amps that give say 100x4 are absolutely huge. Something along the lines of PPI or sundown 100.4, yet some amps that give a ton of power arent even close to being that big like my sundown 150.4
Whats the reason behind that?

Class AB vs Class D, Class D is much smaller and more efficient.

 

[LosIsATool 5,000+ posts]

Some are large but if you open them up they are naked.

 

[Boominburban]

I just got a Massive Audio N3 (class D). That amp is smaller than a 2001 mmats D200HC (class D)and puts out around the same RMS, which is smaller than a OS RF 1501BD (class A/B) that puts out about the same rms power. And the mmats is small as shizz to begin with .... I was very impressed when I ran that little N3 up on the bench last night .....