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Author Thread: Which draws more current?
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ih8dimminglights
Unregistered guest
Posted on Sunday, December 18, 2005 - 11:28 am:    Edit Post
which amp would draw more current from the alternator?
2ch 800 wrms class AB amp hooked up to 2 subs or
1000wrms class d mono amp hooked to 2 subs.
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Optidriven
Bronze Member
Username: N2audio

Lawrence, Ks
USA

Post Number: 40
Registered: Mar-04
Posted on Sunday, December 18, 2005 - 02:19 pm:    Edit Post
It would be pretty close.

Figuring on full power efficiency - a/b will be around 60% and D will be around 75% so...

800/.6 = 1333
1000/.75 = 1333

:-)

Pretty close I'd say.

Overall though, the class D will be less draw to the alt because their efficiency is relatively linear at all output levels whereas a/b are most efficient at full power and get less and less effecient as volume nears zero.
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