# current versus watts

Seems like all high quality amps clearly describe output in watts , with the best amps doubling output as impedance is is halved. But, I do not see(often) specs on current ? why is this ? Is high current as important to quality dynamic sound as high watts. If so, what are the general ranges of current output that would be acceptable for a high quality amp. For example, if you have a 300 watt/channel amp that doubles from 8 to 4 ohm, what would be strong current output ?

Apologize for the simple question and feel free to direct me to earlier post that might deal with this issue
dangelod
17 responses
 02-28-2010 4:43amIs high current as important to quality dynamic sound as high watts.You can't separate the two as current and power are proportional.current = square root of (power divided by ohms)300 watts into 8 ohms takes about 6.12 amps of current600 watts into 4 ohms takes about 12.24 amps of currentSome amps can handle delivering the current needed for 8 ohms at full power but run out before they can deliver the current needed for full power into 4 ohms. The better way to say it is that the amp has to be able to deliver enough current to develop the requested power, not which one is more important.. 02-28-2010 12:40pmHerman: thanks for the response. then, is it fair to ask when looking at an amp what the max current is and view it as a minimum threshold. for instance, in the example above, if the amp can produce 12.24 amps at 600 watts (and also assume a really high quality amp that doubled again to 2 ohms)and 24.48 amps at 2 ohms that is fine. Is there value to "headroom" on the amount of current needed? 02-28-2010 1:17pmDangelod >>Seems like all high quality amps clearly describe output in watts , with the best amps doubling output as impedance is is halved.<