Local HiFi store has Ann excellent condition Krell KSA 100 mk2 stereo amp for $1,500. I don’t mind the space heater function but how difficult would this be to repair as it ages? Other than heat and it’s lack of an energy star rating are there any other downsides to this amp?
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Krell KSA 100 MK2
- Thread starter TankTop
- Start date
It's a beast. Very beasty amp. You will require a variable temperature good'n fairly powerful soldering iron for working this sort of unit. The PCBs and larger parts will sink heat from a iron fast. The hand tools required will be assorted from light duty to medium duty. It apparently has 3 relays in it. Those may or may not have issues. All in all if it is mint and working it's a nice amp. I doubt you can find better for a mint unit that operates well. The parts availability may or may not be good. Until one attempts sourcing parts like semiconductors one never knows if they are common and available. Power supply caps are beasty and may or may not have issue. It's a nice unit. It would be exciting to work on. Try and find a service manual online. I found a schematic but it was made by hand and that's not the best.
I own one of these amps. Two downsides - the weight of it means I can't lift it on my own (although I can drag it about) and in the summer it heats the room to beyond comfortable levels. (Although warm summer days here are quite rare so that's not so much of a problem. if you live in the tropics then it's a non-starter).
As far as I am aware there are no unobtainable parts. If you need a schematic e-mail Krell. I did that for a KSA50S and they supplied it within the hour.
As far as I am aware there are no unobtainable parts. If you need a schematic e-mail Krell. I did that for a KSA50S and they supplied it within the hour.
charleski
Major Contributor
I saw Forbidden Planet on TV when I was 10. This led to me spending many nights lying awake under the covers frantically straining my ears to hear if the invisible monster was coming to get me. Luckily I knew by then that a light-year was a very long distance, which meant the monster wouldn't have time to get to me before morning came....
But I still remember that period and there's no way I'd let the Krell into my house!
But I still remember that period and there's no way I'd let the Krell into my house!
On the Mark 2 the fans should blow upwards so warm air is expelled through the vents in the top of the case.
Then you can stand over it and get a good warm in the winter.
Thank you!On the Mark 2 the fans should blow upwards so warm air is expelled through the vents in the top of the case.
Then you can stand over it and get a good warm in the winter.
DonR
Major Contributor
Once forced induction (a fan) is involved, convection does not enter into the equation. It is a rounding error.
The mark one has the fans blowing downwards, they changed it for the mark two because that was considered to be an odd choice.
Really if you have any sort of fan mounted in any arrangement it is going to suck in crap, I don't see an answer to that other than keep the room laboratory-grade clean.
When I built a KSA50 clone I had the fan at the bottom blowing upwards, I did put a fine fabric mesh/filter on the base of the amp to try and cut down on an dust/crap ingress.
Every so often I take the top and bottom off the amp and hoover out any dust that the filter didn't catch.
Every so often I take the top and bottom off the amp and hoover out any dust that the filter didn't catch.
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