A Class D amplifier, comprising: - a switching node formed between first and second active devices (Q1, Q2) connected in series between positive and negative power rails for alternative on/off switching operation; - a first capacitor (C 1) connected between a primary output and ground; - a load (R load) in parallel with said first capacitor (C 1) both connected to ground; - an auxiliary output for steering ripple away from said primary output, - a series connection of an inductor and a second capacitor, said series connection connected between the auxiliary output and ground; - a coupled inductor (710, 1110) including a primary winding (L 1A) and a secondary winding (L 1C, L 1G) having a turns ratio N p: N s, a magnetizing inductance L M, primary uncoupled inductance L P and secondary uncoupled inductance L S, wherein - first ends or second ends of said primary and secondary windings are connected together, - said primary winding is connected between said switching node and said primary output; - one end of said primary winding is connected to one end of said secondary winding (L 1C, L 1G), and - the other end of said secondary winding is connected to said auxiliary output; - whereby the inductances L M, L P, L S, of the coupled inductor are sized such that the amplitude of the ripple current through the primary winding (L 1A) of said coupled inductor is greater than the magnitude of the load current during most load conditions, said greater ripple amplitude resulting in instances of negative current, such that by switching the active devices (Q 1, Q 2) at instances of negative current, the dissipated power can be minimized. - a switching node formed between first and second active devices (Q1, Q2) connected in series between positive and negative power rails for alternative on/off switching operation; - a first capacitor (C 1) connected between a primary output and ground; - a load (R load) in parallel with said first capacitor (C 1) both connected to ground; - an auxiliary output for steering ripple away from said primary output, - a series connection of an inductor and a second capacitor, said series connection connected between the auxiliary output and ground; - a coupled inductor (710, 1110) including a primary winding (L 1A) and a secondary winding (L 1C, L 1G) having a turns ratio N p: N s, a magnetizing inductance L M, primary uncoupled inductance L P and secondary uncoupled inductance L S, wherein - first ends or second ends of said primary and secondary windings are connected together, - said primary winding is connected between said switching node and said primary output; - one end of said primary winding is connected to one end of said secondary winding (L 1C, L 1G), and - the other end of said secondary winding is connected to said auxiliary output; - first ends or second ends of said primary and secondary windings are connected together, - said primary winding is connected between said switching node and said primary output; - one end of said primary winding is connected to one end of said secondary winding (L 1C, L 1G), and - the other end of said secondary winding is connected to said auxiliary output; - whereby the inductances L M, L P, L S, of the coupled inductor are sized such that the amplitude of the ripple current through the primary winding (L 1A) of said coupled inductor is greater than the magnitude of the load current during most load conditions, said greater ripple amplitude resulting in instances of negative current, such that by switching the active devices (Q 1, Q 2) at instances of negative current, the dissipated power can be minimized.