The LP2.1 features the following upgrades and modifications in comparison to the LP2:
- introduction of many technical solutions that had been implemented in the LP1 Signature (just like the ML2.2 single-ended power amplifier derived many of its technical solutions from the ML3 Signature power amplifier);
- introduction of the new tubes: 6C3P and 6C45P-E (same tubes that used in the LP1 Signature phono preamplifier), and corresponding adjustments in the circuitry;
- significantly reduced output impedance;
- new parts that had been developed by various manufacturers since the introduction of the LP2;
- new pc-board material
- super low noise power transformer
The LP2.1 is a dual-mono vacuum tube phono preamplifier with two electrically and mechanically separated channels. It features a topology that brings out the most natural sound performance in the audio path, as well as graceful and sophisticated design.
The preamplifier operates in a pure class A mode from input to output. High-current drive capability, in combination with unique single-ended class A circuitry, enable the preamplifier to drive any cable and any reasonable real world load, while maintaining its practically inaudible sonic signature. When connected to the appropriate type of electronics, and especially LAMM amplifiers and preamplifiers, it assures the extraordinary transparency of perceived sound and recreation of a three dimensional soundstage in the home, recording studio, etc. without boundaries and limitations.
All amplification stages utilize high transconductance very low noise high-current vacuum triodes. No loop feedback is employed.
The LP2.1 features a very accurate passive RIAA EQ network. The preamplifier's audibly neutral power supply features a full-wave vacuum rectifier which, together with a choke-containing filter, helps reduce the hum and buzz to almost negligible levels and, in the end, ensures the verity of dynamic range without coloration. Solid-state analog voltage regulator is used as a heater supply. Other features include two sets of inputs for each channel and gain/selector switches for MM and MC cartridges.
A unique electronic protection circuitry mutes the outputs until the LP2.1 has stabilized upon being turned on; it also automatically mutes the preamplifier in case the AC line voltage drops or is interrupted, as well as at the turn-off of the unit.
Each preamplifier is carefully crafted with the hand selected components of the highest quality, some of which include military graded low noise DALE metal film resistors; 1% tolerance RCD wire-wound resistors; ELECTROCUBE and VISHAY/ROEDERSTEIN film capacitors; high frequency switching grade CORNELL DUBILIER electrolytic capacitors; FISCHER “Camac” connectors; specially selected military-graded low-noise long-life vacuum tubes; and a custom-designed super low noise power transformer.
The LP2.1 is especially effective in large systems with speakers of reference quality that make it possible to recreate the unique qualities of LPs. The LP2.1 is designed to be used as part of the truly hi-end audio system and is capable of reproducing the studio- or life-recorded musical event with reality approaching that of the concert hall. It is also designed for use in the recording studios as a reference preamplifier for the purpose of controlling the recording process itself and the quality of LPs.
The LP2.1 is available in two versions: standard and deluxe. In the deluxe version, the power supply stores more energy, all film capacitors in signal path are bypassed by polystyrene capacitors of the highest available quality, and a custom-designed massive damping panel significantly reduces all types of mechanical vibrations which, in turn, leads to a slightly more extended, coherent and natural bass reproduction.
The LP2.1 works on all world AC line voltages.