L2

About the L2

The L2 Reference line-level preamplifier by Lamm Industries is a dual-mono, hybrid design that uses solid-state MOS-FET circuitry for amplification together with a separate, all-tube power supply for rectification and voltage regulation. Its topology is a pure Class A, super-linear high-voltage MOS-FET design with no overall feedback, and all audio stages—including the high-current output buffers—are single-ended. The dedicated power-supply chassis employs vacuum tube rectification and regulation with one 12AX7/ECC83, one 6C19P, one 5651A, and two 12AX3 rectifier tubes. The L2 offers extremely high transparency, a very low perceived sonic signature, and three-dimensional soundstage reproduction, and is intended as Lamm's reference-level line stage. Connectivity includes three unbalanced RCA line inputs (Line 1, Line 2, Direct), one tape loop, and both balanced XLR and single-ended RCA outputs, plus an output signal phase-inversion switch for the RCA outputs and remote on/off control for compatible Lamm power amplifiers. The control unit and power supply are housed in separate 19" W x 4.5" H x 13.875" D chassis, each weighing approximately 15.4 lb for the preamplifier and 19 lb for the power supply. Typical power consumption is about 75 W, and the unit is factory-configured to operate on all common international AC line voltages (100/120/220/230/240 V) without internal modification. The L2 is handcrafted in limited quantities using high-quality parts such as low-noise, precision resistors, stepped attenuators, film capacitors, and gold-plated connectors, consistent with Lamm Industries' reference-grade construction.