M-Audio BX5 Carbon Black | 5" Single Speaker Studio Monitor with Magnetic Shielding (70-watt Class A/B Power) Authentic, flat frequency response in a compact footprint 5" woven Kevlar low-frequency driver New, bi-amplified 70 Watt (40+30) Class A/B amplification Acoustic Space Control lets you calibrate the BX5 to your mixing environment New waveguide with LED placement cues provide superior imaging