good amps

not upgrageable

firstly the reason I am given these amp such a poor review is not because of it''s sound, krell have always made good amps, It is because their amp don''t seem to last long on the market for instance ml33h these amp have been around since the ksa series of amp now I hear there are new set of krell amps coming out soon, So that 4 changes to ml0, I am sorry your mad to buy krell none of there amps have been upgradeable you have to be very rich to keep upto date because after 2-3years you have to sell up and the money you have wasted is enough to buy a small car

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ml33h

accurate,neutral,powerfull

expensive

i think that krell is one of the best amp, it is accurate,powerfull,i can not say nothing weakness krell 350 mc sound, but it is expensive.my system sphinx project 32 cd, project eight preamp, dunlavy sc 6 and transparent ultra and reference cables never sound so good than now this amps.i recommend very much krell amps.(other good is sphinx, gamut, audio research, spectron, mark levinson )

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many top amps

Fast, detailed, superb bass and dynamics, musicality, battleship build-quality

Size, useless rear-panel handle-bar, captive power-cord

I was pleasantly surprised at the musicality of this product. Traditionally (for me), Krell has lacked warmth and palpability, yet these monoblocks really excelled at capturing the soul of the music - a cardinal feature. Associated equipment included Utopia and Mezzo-Utopia spkrs, dCS front-end and C-J 16LS preamp, Transparent Ref cable/IC's.
In comparison, the Klimax's were a touch too bright and lacked the dynamic speed and punch of the Krells, especially with the larger monitors. Soundstaging was equivalent. The ML 336 excelled at the microdynamics, but sounded a tad more laid-back and lacked the oomph-factor and control of the Krells. The 350's had the lowest noise-floor of all.
Unfortunately, Krell do not permit use of custom PC's which I suspect may improve their performance further. Both Transparent cable and Powersnakes have been cold-shouldered by Krell when they suggested that the latter use their PC's as upgrades.
Though these are very expensive "babies", they are comparatively cheaper than the other listed amplifiers and certainly surpass them in most domains of musical performance. Unequivocally 5 stars.
Be sure to allow for at least 200 - 400 hours of burn-in before adjudication. Thanks for reading.

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Linn Klimax, Spectral 360, Levinson 336

Convincingly reproduces the venue's acoustic

Size, cost

I strongly agree with Charley from CA. I had a Krell KSA 250 which I loved, driving Wilson 5.1 speakers. I traded it for a pair of FPB 250ms with which I've never been happy. On a good day he old amplifier could fool me into thinking the musician was in the room; the new one never managed this.

I've borrowed a pair of FPB 350mcs and have had them for only a short time, but already the illusion is back, and they don't have the rather shrieky quality that the KSA line could have.

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Krell KSA 250, FPB 250m

Detail, neutral, natural, powerful and musical with feeling.

a bit expensive

My system has been upgraded from Krell FPB600 to FPB350M monoblock. Although the output of FBP600 is almost double that of FPB350M and the character of both amplifiers is similar, the sound has improved significantly in terms of soundstage, richness and quality of the musi etc.etc. The units drive and control the speakers with ease. I can find that it has a wider and deeper soundstage. The image is sharper with clarity and details in high frequency; mid bass is stronger with body and muscle. When I listen to all the albums again, they all sound different. The music and the vocals reproduced by FPB350M seem to have more feeling. As stated in one of the review, the units are highly recommended if you can afford it.

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Mark levinson 20.6, Krell FPB600

Smooth, detailed, powerful, warm

none, if cost is not a big issue

Just pulled these out of the box yesterday and they sound outstanding. Had a pair of FPB250Mc's that were underpowering a set of Watt/Puppy 6's (W/P). Before purchasing I tried, for a few days at home, the FPB600M. This was not nearly as detailed as the 250's and created much too much bass response. Also the separation was just crappy. Sounded like one big blobb in the middle of the room. Given the choice, I would have stayed with the 250's. Had not tried the 350's on the W/P6's but did hear them as compared to 250's on a set of Wilson Maxx's. Probably an unfair test given the size difference between the W/P and Maxx's, but decided to go for it when my 250's were purchased out from under me. Apprehensive as I was spending almost 2x on the 350's, right out of the box (truthfully, with about 10 hours of burn in and all warmed up), these were the best sounding amps I've ever heard. With the W/P's I can't say I've ever heard anything so good. They are 100% faster then the 250's and have a clear, crisp sound that one expects from the Krell/Wilson combo. Having said this, they are not too agressive like the old KSA/Wilson W/P 5.1 combo. These amps drive the Wilson's with a subtleness that I would expect to see from a Levinson, but have much more dynamic range. Clearly, I'm a big fan. I can't say I'll ever be so impressed with a new audio product as I have been with the addition of the FPB350Mc's. Try them for yourself and enjoy!

FYI, using Tranparent interconnects and cables (both Ultra) with Wadia CD.

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Krell FBP 250Mc, FPB 600M, Levinson 332, 331.