The Mark Levinson No. 585 is based on its fully discrete, mirror-image dual monaural analog circuitry with individual signal switching relays for each of its four stereo inputs: one XLR and three RCA.

Robust architecture

Volume controls through discrete 15-bit R-2R ladders and sound-focused analog switches for the widest possible bandwidth and maximum signal integrity. The fully differential class AB power stage includes an oversized 900VA toroidal transformer with individual secondary windings for the left and right channels. Each elegantly simple amplifier channel uses twelve output transistors and multiple smaller local capacitors that allow them to be placed physically closer to the amplifiers for greater transient response when power is immediately needed. This robust architecture results in a conservative power of 200W per channel with stability in 2 ohms. System integration and expansion are possible using the stereo RCA preouts that can be fully controlled or with an included switchable, second-order, 80Hz crossover filter, which allows for seamless integration into 2.1-channel systems with powered subwoofers.