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The Progression circuitry borrows greatly from our Momentum amplifier. Its design couples our core circuit topologies and introduces a new Dan D’Agostino Master Audio Systems topology, the Super Rail. Simple in description but complex in execution, the Super Rail, counter intuitively, uses additional higher voltage power supplies in the input stage than the main output stage. This higher voltage front end provides exceptional headroom for the output circuitry. Nearly ideal output stage operation results. It employs a fully complementary driver stage, outfitted with 84 output transistors—42 for the positive signal and 42 for the negative signal, a nearly 3,000 VA power supply transformer, and 400,000 microfarads of power supply storage capacitance. The iconic look of the Momentum amplifiers’ power meters, inspired by the elegant faces of classic
Swiss watches, continues with the Progression series. The Progression mono amplifier features a new meter design with a 90-degree needle swing, driven by a high-speed ballistic circuit that enhances the meter’s responsiveness. The longer swing allows the needle to cover the amplifier’s entire output range.
Power 500 watts @ 8Ω 1,000 watts @ 4Ω 2,000 watts @ 2Ω
Frequency Response 1 Hz to 200 kHz, -1 dB 20 Hz to 20 kHz, ±0.1 dB
Distortion (800 watts @ 8Ω) 0.15% @ 1 kHz
Signal-to-Noise Ratio 105 dB, unweighted
Input 1 balanced XLR
Input Impedance 100 KΩ
Output Impedance 0.15Ω
Dimensions (h x w x d) 18 x 20 x 7.5 inches / 45.7 x 50.8 x 19.0 cm
Weight 125 lbs / 57 kg