If I'm thinking of the right amp, it's the little 20wpc class A. I owned one for quite a while a number of years ago. Nice sweet sounding piece.
All the speakers you mention are not on the 'easy to drive' list. My guess is you are straining the little guy if the sound is thin and harsh.
You might look at some of the higher efficiency speakers, particularly those with higher impedance. I don't think class A SS likes 4 ohm loads.
And if you room is big, or you like to listen loud, that is definitely not the amp for you.
All the speakers you mention are not on the 'easy to drive' list. My guess is you are straining the little guy if the sound is thin and harsh.
You might look at some of the higher efficiency speakers, particularly those with higher impedance. I don't think class A SS likes 4 ohm loads.
And if you room is big, or you like to listen loud, that is definitely not the amp for you.