i have to admit though i think my k601 sounds bit smoother over my sextetts lp is one advantage it has. thing is, it can't handle no where near the power my sextetts lp can. driving the k601 off speaker outputs off my 1985 Class A Yamaha R-9 i thought i was gonna kill them when i hit play cause the drivers were flexing so hard with the amount of power and distorting like crazy. even off the headphone jack of my yamaha i can barely touch the volume knob and afraid of killing them. that's why i like using orthos,sextetts and high impedance low-sensitive headphones off of it. afraid of killing something lol. if it's not very high impedance or very low-sensitive i use the headphone jack. speaker outputs are sextetts,DF's and planer magnetic exclusives. other headphones on the headphone jack or another lower powered, power amp.