Thanks. I didn't think it would be as much of a problem as impedance issues or simply not having enough gain. The amplifier has 23 db of gain and a stout 60 Watts. It has any effect at all, I imagine it would be to make the amplifier marginally less powerful but that's not an issue with my speakers and listening habits.
Paul
PS: why would somebody try to drive medium sensitivity speakers with a 5 W amplifier and a passive pre?