The compact Studiophile™ AV 40 powered speakers deliver the same proven M-Audio technology favored by top producers, recording engineers and musicians around the world. The combination of 4” polypropylene-coated drivers and 3/4” ferrofluid-cooled silk dome tweeters provides punchy lows, crisp highs and a balanced, uncolored response. Custom cabinets with dense wood construction deliver more accurate bass response than you could ever get from plastic multimedia speakers. And for the highest possible fidelity, the Studiophile AV 40 speakers also feature OptImage III wave-guide technology and a 20 watt-per-channel internal amplifier that utilizes Class A/B architecture. The Studiophile AV 40 reference monitors are the perfect solution for traveling musicians or anyone who wants top-notch sound from their desktop multimedia system.

http://www.m-audio.com/products/en_us/StudiophileAV40.html