SQBubble wrote:I have been told that sometime some compagnies put on some fake fuse to make it look like it has alot and make alot of power... how can you know if an amplifier has fake fuses?
anyone can explain/clarify this?
eezip wrote:SQBubble, first of all, 3 fuses at 40A each and a generous 14.4V isn't even 1800W so it can't do 2400W. It might put out 2400W dynamic [peak].
BTW, the measurement for Watts in intrinsically RMS. If Watts is to be expressed in any other form than RMS, like dynamic [peak], it should be specified but the unit WRMS is redundant. Anyway...
There are some things that look good about the amp - the general power flow looks fine. I can't figure out why there are 4 big toroids around the output stage. I assume this is a class D amp, but even if it's a full bridge there should only be 2 inductors or 2 if the inductors are wound on a common core in a 2nd stage filter. They could be using some topology I'm not familiar with. Or the output filter could be more than 2nd stage. In this day and age, I find absolutely no reason to use more than 2nd order output filters and that's in agreement with some well respected engineers. Class D amps with second order filters can perform amazingly well [see Hypex/UcD, IR's demo amps, and many others out there] and it's much easier to close a loop around a 2nd order filter. Then you have the parts savings, board space savings, and less tolerance stack up in 2nd order filter's favor as well. But back to the subject; I don't really know what I'm looking at. The pictures aren't detailed enough to make a very good judgment so take everything I've said with a grain of salt. Sorry, but it's not easy to render a verdict with very little information.
jrlutor wrote:And yes, we call our open ended D- topology class DE. [No 4080 chips used.]
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