The difference between 6 watts and 40 watts is about 8 db. Roughly speaking, for a rotary volume control an 8 db change typically corresponds to about 60 or 70 degrees of rotation (aside from settings near the bottom of the control's range, where volume changes occur more rapidly).
So I would expect that you should be able to get to at least the 2 o'clock position without driving the amp into clipping. And in any event I would expect that you would hear obvious distortion well before any damage would occur to either the speakers or the amp.
Good luck. Regards,
-- Al
So I would expect that you should be able to get to at least the 2 o'clock position without driving the amp into clipping. And in any event I would expect that you would hear obvious distortion well before any damage would occur to either the speakers or the amp.
Good luck. Regards,
-- Al