ihave not heard the ksa 80 but owned a ksa 100s . ifound this amp to be on the soft side and did not seem that it reveals the inner detailing and thought it did not really for a krell go the extra mile in the bottom end. i would call krell and ask them what speakers you are using the amps on and what they feel is the BETTER amp. since you are buying used they most likely will not have a problem answering your question. good luck, bill
krell ksa 80 vs. krell ksa100s
thanks for any input you may give. i have b&w 801 series 3 speakers and currently using the ksa 80 amp. i will be trying out a ksa 100s in the near future. wanted to know if there is anyone out there that is familiar with the 2 amps and i am looking for any thoughts on their performace/opinions with the b&w 801 martrix3. thanks, ralph