Hi,
I heard the 201's a few times and the 501's for a few hours. The 201's have problems to control very demmanding speakers with a big driver/s. They are a little leaner, bright and make you feel they are quicker, more focused, more detailed, than the 501's. I never had the feeling that they are a real 250Wpc, like others transistors amps I know. The 501's is more natural sounding and have more power than the 201's. They have a better balance, dynamics, low level resolution and a better control in the bass frequences.
I hope this help,
Tomer
I heard the 201's a few times and the 501's for a few hours. The 201's have problems to control very demmanding speakers with a big driver/s. They are a little leaner, bright and make you feel they are quicker, more focused, more detailed, than the 501's. I never had the feeling that they are a real 250Wpc, like others transistors amps I know. The 501's is more natural sounding and have more power than the 201's. They have a better balance, dynamics, low level resolution and a better control in the bass frequences.
I hope this help,
Tomer