Parasound NewClassic 2125 v.2 Two-Channel Power Amplifier. Parasound's NewClassic Model 2125 v.2 is one of the company's most top-selling two-channel power amplifier. Its unbeatable combination of power, dynamic features, sturdy build quality and cost-efficient make it a must for all but the most demanding systems. And the THX Ultra2 certification means that it meets the most stringent performance standards for convincing reproduction of movie soundtracks.