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Amps and ohms

335 Views 3 Replies 4 Participants Last post by  Gordon McGregor
If the specs on an amp say 200W @8 ohm and 330W @ 4ohm Does that mean that it will not do 6ohm or do they just not list it?


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If it can take a 4 ohm load it will handle a 6 ohm load just fine. It is just not listed what it is rated at for a 6 ohm load. Most amps that list only 8 ohm specs can handle 6 ohm load with no problem, and most of the time can handle a 4 ohm load.
If you're looking at an amp that will do 330 watts at 4 ohms and 200 watts at 8 ohms, that's an indication of no current limiting and a nice generous power supply. Without knowing much more, I'd say it's probably a good amp...


Give it up...what is it?? :confused:
Quote:
Originally posted by Paul Scarpelli
If you're looking at an amp that will do 330 watts at 4 ohms and 200 watts at 8 ohms, that's an indication of no current limiting and a nice generous power supply. Without knowing much more, I'd say it's probably a good amp...

Give it up...what is it?? :confused:
In accordance with the Ohm's Law ... Paul, I agree that this amp has a nice power supply. In my opinion to have a good power supply the amp has to lose less then 20% with 4 ohms load in comparison with 8 ohms, for example:

200W at 8 ohms, ideal situation P=U*U/R, if U=const (ideal power supply) and R changed from 8 ohms to 4 ohms, ideal power =400W

The loss in this particular device: 330W/400W= 82% (the loss is 18%), so you are right, this is a good amp.
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