2. amps-preamps
  3. 1386502233

Krell KSA-200s First Time Use

Ok in experimenting with the KSA-200S for the first time, in plugging it in to the wall socket (not connected to speakers or anything else) it comes on for a few seconds, then shuts off. Any ideas as to what is going on? Is this normal?
professorjohnkercheval
brf
1,715 posts
 
Audiolabyrinth, the 20amp supply is required when the amp is required to provide large amounts of current under load. The OP's problem is that he cannot even get the 200S to stay on at IDLE.

My former KSA 250 would operate with a 15amp circuit, although peak performance was obtained with use of a 20amp circuit.

If the OP amp was trying to draw too much current from the 15amp circuit, why does the 15amp circuit trip?

The best advice is to give Krell a call or try the amp with a dedicated 20amp circuit to satisfy Audiolabyrinth's concern.
minorl
1,021 posts
 
Something isn't right with the amp. The 15 amp circuit breaker would trip first if their wasn't enough current to handle the amp. It isn't the circuit wiring. However, there may be a voltage sagging problem with the amp pluged into that particular wiring. if the wiring isn't adequate, at turn on, with too much amp draw, the voltage drop may be substantial enough to turn off the amp based on low voltage protection in the amp. So AudioLabrith may be correct to a point. It isn't the rating of the circuit breaker, but it may be the actual wiring itself. Take the amp to another place with a dedicated 20 amp ciruit (say the dealer where you bought it) and plug it into a 20 amp circuit with 10 gauge wiring and see if it stays on. No amp should trip off if speakers aren't connected.

enjoy
knghifi
1,668 posts
 
12-10-13: Bifwynne
Prof. John, just a wild arsed speculation here, but is it possible the amp is tripping because it needs to be hooked up to the speakers. Maybe the open circuit is doing it. If not, it's time to call the factory.
Exactly my thought.

I had 3 Krell amps (KSA100s, FPB300 and FPB600) when living at my brother's condo. Even though it was new construction, there were no special wiring, outlets ... just basic construction grade 15 amp everything.

Using stock PCs, I never had problems with circuit breaker tripping or any power related issues. From my experience, 20 amp dedicated circuit is NOT a requirement for Krell amps to play at a moderate to loud level.
audiolabyrinth's avatar
audiolabyrinth
4,555 posts
 
Hi, what I have been tring to say, it seems no one understands, I am tring to say that the ops krell ksa 200s amp has to be sharring power with something else in the house, and the breaker he has is tripping because its to much, and the amp is starving, so it shuts off because of the lack of sufficient current, if the op just runs a dedicated line and circuit, btw, is cheap to do, if the problem then is not solved, his amp has damage!, the amp should work correctly when its not connected to speakers, my krell does, and all the krells I have ever had did too!, cheers gentleman.
brf
1,715 posts
 
I agree, the KSA 200S does not need a load attached when powered on, it even states that in the manual.

Question for Audiolabyinth. Why doesn't the OP's 15amp circuit trip if the load is too great? The KSA 200S at idle only consumes 150 watts.
More to discover