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M1.2 Reference

Monaural Power Hybrid Amplifier (pure class A)

A milestone In high-end amplification

The M1.2 Reference monoblock power amplifier represents a top of the line product in LAMM hybrid and solid-state audio equipment. It is the pinnacle of its designer’s professional career and a result of years of intensive research directed solely at attaining the most accurate reproduction of recorded music. Unique topology and application of the most advanced technological resources and processes bring the M1.2 Reference to a threshold of excellence in sound reproduction.

LAMM M1.2 Power Amplifier on black and beige pillars against a black background

Product Details

Design Elements

A distinctive feature of the M1.2 Reference is its presentation of the extraordinary transparency of perceived sound which in turn assures the recreation of a three dimensional soundstage in the home, recording studio, etc. without boundaries and limitations. The M1.2 Reference is a masterful blend of design and engineering simplicity. It is a pure class A amplifier featuring high-speed MOS-FET transistors in the output stage with no overall feedback and special switch-selectable bias/voltage settings for 8- or 4-Ohm operation.

The bias setting switch assures the pure class A operation of the M1.2 Reference when matched with a speaker load of either 4 or 8 Ohms, whereas conventional class A designs double the power into 4 Ohms resulting in one fourth of the doubled power in class A and the rest in class AB (learn more about this in FAQ section of our website at lammdev.wpengine.com/faq/switch.html).

The M1.2 Reference is a hybrid design with one specially selected 6922 vacuum triode in the second stage.The M1.2 Reference is conservatively rated to deliver 110 Watts into 8 and 4 Ohms in pure class A operation (high and low impedance settings, respectively); 220 Watts into 2 Ohms, and 400 Watts into 1 Ohm (low impedance setting), continuous. The M1.2 Reference can drive any known speaker. The harmonic structure remains intact regardless of the speaker load, while the extreme clarity is maintained at all power levels.

Inner workings of LAMM M1.2 Power Amplifier

Components

Each amplifier is carefully constructed and hand-crafted with the finest materials and parts currently available, some of which include military graded low noise DALE metal film resistors; PRC wire wound resistors; ELECTROCUBE and ROEDERSTEIN film capacitors; high frequency switching grade CORNELL DUBILIER electrolytic capacitors; BOURNS multi-turn potentiometers; HAMMOND filter chokes; military graded low noise long life vacuum tubes; high quality heavy duty gold-plated binding posts and RCA jacks; gold-plated NEUTRIC XLR connectors, and CAMAC-type coaxial connectors from FISCHER.

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 M1.2 Reference works on all world AC line voltages. U.S. Patent No. D368,261; U.S. Patent No. 5,470,795; other patents pending.

Features

Technical Specs

Highlighted Specifications

Measurements & Specifications

The following measurements of the M1.2 Reference were performed by the late Bascom H. King

Critic Reviews & Press

Awards

MonoStereoEditorsChoice2017

2017

Editor's Choice Award

Mono & Stereo
EDS CHOICE LOGO 2017

2017

Editors' Choice Award

The Absolute Sound!
EDS CHOICE LOGO 2016

2016

Editors' Choice Award

The Absolute Sound!
TAS EC 2015

2015

Editors' Choice Award

The Absolute Sound!
TAS EDS CHOICE 2014

2014

Editors' Choice Award

The Absolute Sound!
TAS EC 2013 logo

2013

Editors' Choice Award

The Absolute Sound!
TAS EC 2012 logo

2012

Editors' Choice Award

The Absolute Sound!
TAS EdChoice2010 red

2011

Editors' Choice Award

The Absolute Sound!
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2009

Golden Ear Award

The Absolute Sound!
“The M1.2 combines large peak-current delivery and low output impedance for minimal load interaction. Because it includes a tube in the signal path it’s a breeze to integrate into a system. Bass control and pitch definition are exceptional, but it goes well beyond traditional solid-state virtues. Its sonic character is warmer and more liquid. Harmonic colors are reproduced with convincing fidelity, including soprano voice and violin. Its transient speed of attack and sublime control of transient decay, which account for its capacity to dig deep into a recording’s noise floor to elucidate reverberant information, are impressive. This is a superbly engineered real-world product that is a pleasure to use. Its siren song of suave harmonic textures, right bass control, articulate transients, kinetic drive and essential tonal neutrality is musically most persuasive. I find its performance-level clearly worthy of the Reference appellation. A sonic masterpiece!” -Dick Olsher, The Absolute Sound, #193 (June/July 2009), p.52
Show Review
HF Ref award large

2007

Reference Award

HAUTE FIDELITE
FDSawards2006

2006

Top Amplification Components

Fedelta del Suono Magazine
RobinsonsBrutusAward2006

2006

Robinson's Brutus Award

Positive Feedback
sphile RC thumb

2005-2008, 2012-2017

Class A

Stereophile
Class A for solid-state power amplifiers in the Recommended Components section. The 110W M1.2 with tube front end and MOSFET output stage, comprehensive short-circuit protection, and high/low impedance settings, offered “unflinching honesty in conveying the true nature of the music that passed through it,” said PB. “Utterly continuous and coherent from top to bottom,” the M1.2 combined resolution and transparency with harmonic completeness, timbral richness, and glow. [The sound]…impressed JA with its three-dimensional soundstaging and midrange richness. “This is a great amplifier,” JA decided. “High recommended.”
Show Review
ReviewersChoice2004

2004

Reviewers' Choice

Soundstage! Magazine
M12 Select UltraAudio

Select Component

UltraAudio.com

Service & Support

Complementary Equipment

Compatible Discontinued Products:

LL2 or L2 Reference or LL1 Signature

Only one of the above products is required for a system

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