It's impossible to determine the amps rise and slew rate (or inherent ringing) from damping factor alone. It would have to be put on a scope and stringently tested.
Low damping factor but fast& high current SS amps?
fine, fast, warm, fullbodied, cohesive, coherent, great timing
100W minimum, damping factor lower than 100 at 8 Ohms - better options than krell ?
100W minimum, damping factor lower than 100 at 8 Ohms - better options than krell ?