I made that exact switch. I was using the KMA 100s as the bass in a bi-amped system and moved up to the 160s. I didn't need more power, but the 100s are not terribly stable down below 30 Hz. Also, I hated the fan noise from the 100s. Additionally, the 100 is less reliable due to the way it is cooled. The 160s definitely have more punch and control on the bottom end. While I haven't used them on the top end, they should actually sound a little better. Most of the older Krell amps improved over time on the top end until they went to the plateau biasing. These really did not sound as good on the top end--but that came after the 160s.
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