The ML1.1 is a direct replacement for the ML1 amplifier. The ML1.1 features the following upgrades and modifications as compared to the ML1:

• significantly simplified procedure for adjustment of the idle current and balance of the output stage tubes
• addition of two user-friendly fuse holders — one accommodating the mains fuse and located on the rear side, and another accommodating the plate fuse and located on top of the chassis right below the meters. The plate fuse holder makes replacement of the plate fuse a snap compared to the ML1 amplifier, where it was carried out by removing the amp’s bottom cover.
• power transformer upgraded to accommodate the 230V mains operation (in addition to the already existing 100/120/220/240V in the ML1)
• modified output transformer
• addition of two handles on the
• rear to make it easier to handle the amps and protect the rear panel connectors during transportation
• heavy-duty speaker binding posts
• utilization of better quality parts and materials that have become available in recent years

90W monaural power amplifier model ML1.1 represents a new generation of power amplifiers employing unique high current low impedance power vacuum tube triodes in the output stage. Implementation of these triodes has allowed to create an output transformer with a very low turns ratio and, as a consequence, extended (as compared even to the most advanced modern vacuum tube amplifiers) frequency decade factor, as well as dramatically reduced leakage inductance.

The ML1.1 topology had been chosen to bring out the most natural sound performance in the audio path. Special aspects of the design enable the ML1.1 to recreate a three-dimensional soundstage without boundaries and limitations while maintaining the extraordinary transparency of perceived sound. A custom-designed output transformer had been significantly improved compared to that of the ML1; this transformer, along with a unique output stage, allow the ML1.1 to drive any real world speakers while maintaining proper harmonic structure and integrity of the amplified signal for all load conditions. Two meters — one for setting bias of the output stage tubes and another for measuring idle & maximum plate current — permit the user to easily control the output stage operation and simplify the replacement, if need be, of the output tubes.

In conceiving and executing an overall design of the ML1.1, the goal was to utilize the modern technology and processes while recreating a look reminiscent of the long-gone genuine vacuum tube era. Each amplifier is carefully constructed and handcrafted of the finest materials and world class parts, some of which include military graded low noise DALE metal film resistors; CADDOCK power film resistors; PRC wire wound resistors; BOURNS multi-turn potentiometers; ELECTROCUBE and ROEDERSTEIN film capacitors; high frequency switching grade CORNELL DUBILIER and UNITED CHEMI-CON electrolytic capacitors; HAMMOND chokes; gold plated NEUTRIC XLR connectors; military graded low noise long life vacuum tubes. Special attention was given to designing the toroidal power transformer, which has no mechanical contact with either the transformer cover or the chassis and is suspended in a special encapsulant that almost completely absorbs even the residual mechanical vibrations. This plays a significant role in assuring the absolutely unique clarity and micro-resolution during sound reproduction.

The ML1.1 works on all world AC line voltages (100/120/220/230/240V).