I had owned S300i for my office system. It drove bookshelf speakers well and I loved that Krell sound. However, when I hooked it up to Strads, it overheated and shut off in about 15-20 minutes. It was at moderate volume. My dealer let me try a different unit and same problem repeatedely happened. I understand it is probably not designed to be used for bigger speakers, but it is supposed to double up to 300 WPC at 4 ohms. I guess specs do not tell the whole story. I am wondering if S550i would have better luck with heat tolerance.
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