My NS10's has never sounded better! I had the original woofers installed and used them for maybe 15 years and the person I bought them from had never changed them either. Unfortunately when my girlfriend moved in, her cat stuck her claws in one of the woofers soo. Back to the Avantone AV-10... I feel the speaker has a tad more low end and feels clearer, we're talking slightly. But the previous woofers were really old so maybe this is how the NS10's sounded completly new from the factory. Would definately recommend these!