Audio Database

The

MARK LEVINSON No23L 1,300,000yen(April, 1987 release)

Description
 
Stereo power amplifier which made the performance of monophonic power amplifier No20L condense.

The RF noise includeded on AC line, and the high-pass filter and anti buzz circuitry for the measure against an asymmetrical current are adopted as the power-source part of a right-and-left independency. Moreover, the toroidal transformer which is proud of rated 1200VA is carried in the transformer by the right-and-left independency.

A mass filter capacitor and a power transistor are directly linked with an output stage by an oxygen-free-high-conductivity-copper bus bar, and also the purity of the power source is polished by adoption of the triple it1 by a quality capacitor.

In a voltage amplification cartridge and the driver stage, the two-step differential cascode circuitry and the stabilizing supply were adopted, and the output stage is always controlled by first class operation.

The balance input is also supported.

Bridge connection is possible and a using is possible also as monophonic amplifier.

Internal Power
Power-source

Rating of a mode
Form Stereo power amplifier
Stream composition Dual monophonic stream composition
Output power 700W+700W (2ohm)
400W+400W (4ohm)
200W+200W (8ohm)
1,400W (at the time of 4 ohms and bridge connection)
800W (at the time of 8 ohms and bridge connection)
Peaking capacity 3,025W (20Hz, 0.5sec)
Frequency characteristic 4Hz - -140kHz three dB
Input impedance 50kohm
Power source AC100V, 50Hz/60Hz
Power consumption 225W (at the time of an idling)
1200W (at the time of 8 ohms and an Output power)
Dimensions Width 483x height 210x depth of 450mm
Weight 40kg