Skerdi, you shouldn't overly concern yourself about "how they sound". At best these designs can match the transparency in amplification that AB amps have achieved. Don't be fooled by the flowery language found in some reviews about sound characteristics which don't in fact exist. The advantage of these designs is in higher efficiency, less heat, smaller size and lower weight, not some mysterious sound qualities.Someone looking for these factors can find them at a far more sensible price in receivers such as the Panasonics mentioned by 2x6, among others. A good discussion of class D amps can be found on the Georgia Tech site excerpt from
Marshall Leach (the math can be skipped).
