Audio Database


MARK LEVINSON No20L 2,800,000yen(It is 1 set in two sets, 1986 release)

Monophonic power amplifier which realized the powerup pursuing the quality more than ML-2L.

The power-source part has adopted perfect ± independent-source stream composition which carries a power transformer in a positive and each negative, and each transformer has adopted the mass toroidal transformer of 600A. Moreover, by the low-noise, it is parallel to a filter capacitor and the quality polyethylene type excellent in the impedance characteristic is adopted as it.

The high-speed regulator is seen off in the power source of an output stage for loading and the clean and stabilized power source from the driver stage with large capacity from ML-2L.

The complimentary push-pull circuit by whole page pure class A operation is adopted as circuitry.

A balance receptacle is also possible at a CAMAC termination and canon termination combined use.

High-power-izing by bridge connection is possible.


Rating of a mode
Form Monophonic power amplifier
Output power 400W (2ohm)
200W (4ohm)
100W (8 ohms, 20Hz - 20kHz, and less than THD0.1%)
800W (at the time of 4 ohm and bridge connection)
400W (at the time of 8 ohm and bridge connection)
Input sensitivity/impedance 1.4V/50kohm
Gain 26dB
THD 0.06% (at the time of 8 ohm and an effective output)
Cross modulation distortion 0.02% (at the time of 8 ohm and an effective output)
Frequency characteristic 4Hz - -140kHz three dB
SN ratio 100dB
Slew rate 15v/microsec
Dumping factor 1000 (8 ohms, 50Hz)
Power source AC100V, 50Hz/60Hz
Power consumption About 500W
Dimensions Width 483x height 210x depth of 560mm
Weight About 30kg