A lot depends on which Line Magnetic amp you are talking about. Your speakers are only 90 db with a minimum 6 ohm load. LM manufactures SET amps from 18 watts to 50 watts. You might get by on the lower end of the spectrum if you room isn't terribly large or you don't listen at very loud volumes. But I will say that Line Magnetic amps are very well built and sound great, at least that is true of the 518ia that I used to own.
Oz
Oz