'M80s' and 'lacking bass' should never be uttered in the same sentence. If there is one thing the M80's don't do, it's lack bass. The 15 inch woofers in my old Cerwin Vega's wish they could hit as hard and low as the humble looking 6 inch woofers in the M80's can hit. I'm still looking for the 12 inch cones that are hidden somewhere inside these babies. They did a good job of disguising them, but I just know they're in there somewhere!