If you are an audiophile, you are already familiar with D’Agostino. They continue to impress, with their Momentum Monoblock Ampliﬁer [$29,000 (silver); $31,500 (black)]. It is the ultimate expression of legendary audio designer Dan D’Agostino’s passion for music. It delivers an astounding 300 watts into 8 ohms, but thanks to its highly efficient copper heat sinks with cooling venturis, the chassis is just 5 inches high and consumes less than 1 watt of power at idle. Proving power can also be green. Fully complementary, balanced circuit topology using 1% metal-film resistors and 69 MHz output transistors allows ultra-low noise and bandwidth exceeding 200 kHz. A distinctive meter, inspired by the styling of fine Swiss watches and bearing D’Agostino’s signature, allows monitoring of power output. Each unit is hand-built and individually tested in D’Agostino’s Arizona factory. Rugged throughhole construction allows the use of higher-quality components, thus assuring superior performance for years to come.