Krell FPB-300 vs FPB-300c ??

Rwwear is correct. But psycologically the newer model may sound better.

(it is a different story with the 400)

Drrdiamond, What's the different story with the 400? Could you elaborate? Thanks.

With the 400, there was more done to the amp than just the addition of the cast.
The sound is better, but how much is very debatable.

I have elected to stay with the 300 and take advantage of an aftermarket PC, which you can't do with the 400 without voiding the warrantee. Probably the best sonic result would be from an altered 400 with an aftermarket PC.

Richard

So what's the difference between 300c and 300cx??

The "c" is an FPB 300 with CAST inputs The "cx" is what used to be a 200c but the new technology that Krell has developed allows 100 more watts per channel from their amps. Their smallest class A amp is now the 300cx. What was their 300 watt amp is now 400 watts. The 600c is now a 700cx. Owners of earlier models can have them updated and gain 100 watts per channel. Owners of earlier designs that have removable power cords can have their cake and eat it to by upgrading.