source I just upgraded from Audio Aero Capitol Mark 1 to Capitol Mark 2 CD player. the Mark 1 had slight extreme bass extension and weight deficiency the Mark 2 has totally eliminated this deficiency I cannot believe the bass my speakers are putting out now thought I needed bigger woofers to accomplish this bass output. And player isn't half way broken in yet. Your speakers are better than you think they are and benefit from a better source always.