# Krell KAV 400xi, peak current

Does anyone know the peak current of the Krell KAV 400xi integrated? It doesn't seem to be on the Krell website and I can't find it elsewhere. Thanks.
rfprice
7 responses
 11-06-2006 4:34pmPer the Krell web stie 138v peak to peak. 11-07-2006 9:46amYo Rfprice,It is easy enough to calculate, but why do you want to know? Are you going to try to do some welding with one?The amp is rated at 400 watts per channel into a 4 ohm load. The power formula is:P=I^2 x R (where: P=power in watts, I=current in amps, and R=resistance in ohms)400 = I^2 x 4(divide both sides by 4)100 = I^2(take the square root of both sides)10 = I (flip the values across the equal sign)I = 10 ampsIf you are driving 8 ohm speakers, then the current would be half of that or 5 amps. The 400xi might have a little headroom, but not much. Unlike its big FPB brothers, the 400xi doesn't like to drive low ohm speakers. A friend of mine hooked one up to a pair of Apogee Stages (3 ohms nominal) and the Krell got hot enough that it melted solder joints on the circuit board. 11-08-2006 5:38pmThanks for the formula, Audiopath. I'm looking for a new integrated for my B&W 704 speakers. They seem to want a lot of power. 11-08-2006 7:31pmYou won't have any problem driving those B&W's with the 400xi. I've got the B&W CDM9 NT's and my Krell drives them easily w/o any hint of struggle. Remember, the Krell peaks at 280 wpc before clipping (according to Stereophile, if I recall correctly), well above its 200 wpc rating. 11-08-2006 10:25pmI'm using the KAV-400xi to power a pair of B&W N802s with very good results. Any B&W Speaker south of the 801 should be fine with this Amplifier. Don't let it's price or size fool you, this is one powerful high-current Amplifier. 11-10-2006 2:58amThanks for the responses. I'm sure you're right, that they will power my speakers. Still though, I'm surprised to hear that they're 5 amps. That's pretty small compared to some others I've been looking at such as some MF equipment which is 50 amps. Post removed Aug 12, 2015