The Alchemy DPA-2 Power Amplifier is all about dynamic musicality, thanks to a design that combines Class A circuit topology composed of discrete FETs and a linear power supply using a toroidal transformer. It is a stellar Alchemy product from the wizards on ELAC's design team, led by the legendary designer Peter Madnick of Audio Alchemy and Constellation Audio fame. The DPA-2's pure analog input stage preserves all the detail and nuance of the most delicate passages. The Class D output stage with switching power supply results in impressive output combined with cool-running efficiency. The power output of the Alchemy DPA-2 isn't just formidable, it's easily configurable for the needs of every system. Producing 325 watts-per-channel in stereo, the Alchemy amplifier can be easily switched to deliver 650 watts in monaural mode, which is sufficient to drive the most demanding, power-hungry loudspeakers. The DPA-2 is loaded with must-have features and meticulously designed circuitry that's fully balanced from input to output, starting with user selectable high/low gain settings to match any preamplifier. It boasts a fully discrete FET input stage with DC servo-controlled output stage, ultra-low-noise DC voltage regulators, a toroidal transformer and linear power supply for the input stage, and a high-efficiency, low-noise switching power supply for the Class D PWM output stage. The output power can be read out on the LCD information screen. Inputs pairs consist of unbalanced RCA and balanced XLR. Outputs are two pairs of high-quality 5-way binding posts. There is a 12-volt trigger input and pass-through, too. Dimensions (HxWxD) In: 02.00 x 17.50 x 15.00 including jacks, Net Weight: 14.00 lbs. Frequency Response: 5hz-20khz +/- 0.2dB Nominal Thd+N (1 Watt Into 8Ω): 0.003%. Inputs: Unbalanced RCA, Balanced XLR, Outputs: Binding post 5-way.