MARK LEVINSON 33H, NOT MCINTOSH, DCS, AUDIO RESEARCH, KRELL

NO AUDITION NOR VIEWING PRIOR PRICE AGREED DUE TO COVID 19 A REFERENCE PURE CLASS A POWER AMPLIFIER FROM MARK LEVINSON IN EXCELLENT CONDITION. DESPITE THE AGE, THIS VINTAGE POWER AMP STILL ON OF THE BEST TILL TODAY. The No33H features a 3.47 kVA low-noise toroidal transformer in a fully balanced power supply—a design that provides separate power supplies for the amplifier’s inverting and non-inverting halves. In addition, each No33H uses four 60,000 μF low-ESR capacitors. Heavy bus bars enhance the efficiency of power distribution with- in the amplifier and eliminate variances introduced by the wiring harnesses commonly found in even high-performance amplifiers. High-frequency power supply bypass is accomplished using indi- vidual PC boards that use 32 components of several different film types. The resulting uniformly low power supply impedance seen by various circuits within the No33H lays the foundation for mas- sive power and extraordinary finesse. The detrimental sonic effects of noisy, unbalanced AC power supplies are widely known. Commercially available passive AC line conditioners provide some measure of AC power filtering and surge protection for line-level components such as preamplifiers and digital audio processors. However, these line conditioners cannot handle the large, instantaneous currents that power ampli- fiers require. In effect, the line conditioner becomes a bottleneck in the otherwise free flow of power through the amplifier and loudspeakers, greatly reducing the dynamic impact of the signal. To avoid these performance bottlenecks, the No33H uses built-in line conditioning techniques. When AC power is delivered to the No33H, it is rectified, filtered, and regulated. https://www.stereophile.com/solidpoweramps/115/index.html