I don’t use a sub for stereo but that's mainly because I don’t have much in 2.0 that needs a sub when using the M80s. OTOH I do use the sub for multi-channel music.

3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1