Stereo power amplifer
The Momentum S250 stereo amplifier delivers the extraordinary sound quality of the Momentum M400 monoblock in a more affordable stereo design. The circuit topology and construction of the stereo ampliﬁer mirror those of the monoblock, using the same ultra-efficient copper heat sinks with venturi cooling, the same 1% metal-film resistors, the same 69 MHz output transistors and the same fully complementary balanced configuration. The result is audio fidelity equaled by no other ampliﬁer—except, of course, the Momentum M400 monoblock itself—and an efficient design that consumes less than 1 watt of power at standby.
The new Momentum S250 stereo amplifier receives a power upgrade, now delivering 250 Watts/channel into 8 Ohms. This is up from the original 200 Watt/channel specification. A 20% increase in transformer size, up to 1,800VA, provides the engine for this output power increase. Connected to this larger power source is a new output stage design that includes a number of major enhancements.