The Pass Labs X-350 is a better sounding amp than the Krell KSA 300. As you can see I am a Krell owner so I am not out to just bash Krell. A Krell FPB 300 would be a better match to the X-350. The KSA series is older and I don't think as good as the newer FPB series.
Either of these amps will drive a pair of Apogee Calipers, the X-350, KSA 300 or the FPB 300! They will drive virtually any load presented to them without any trouble.
Either of these amps will drive a pair of Apogee Calipers, the X-350, KSA 300 or the FPB 300! They will drive virtually any load presented to them without any trouble.