LAMM M1.2 Reference
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LAMM M1.2 Reference

Reference monoblock power amplifier / Pair

LAMM M1.2 Reference
LAMM M1.2 Reference
LAMM M1.2 Reference
LAMM M1.2 Reference
LAMM M1.2 Reference
LAMM M1.2 Reference
LAMM M1.2 Reference
€ 33.990,00 Price include 21% VAT Price exclude VAT € 28.090,91
AVAILABILITY:  1 MONTH
The Lamm M1.2 Reference represents the company’s statement hybrid tube and solid-state amplifier. A result of years of intensive research directed 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. 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, 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. 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.

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.

Specifications

Rated Output Power
HIGH IMPEDANCE SETTING minimum continuous sine-wave power, from 20Hz-20KHz with no more than:
- 0.3% THD (FTC) @ rated line voltage > 110 Watts into 8 Ohms (Class A operation).
- 0.3% THD (FTC) @ rated line voltage > 220 Watts into 4 Ohms (55 Watts Class A operation).
- 0.5% THD (FTC) @ rated line voltage > 400 Watts into 2 Ohms (27.55 Watts Class A operation).
- 1% THD (FTC) @ rated line voltage > 600 Watts into 1 Ohm (13.75 Watts Class A operation).

LOW IMPEDANCE SETTING minimum continuous sine-wave power, from 20Hz-20KHz with no more than:
- 0.3% THD (FTC) @ rated line voltage: 110 Watts into 4 Ohms (Class A operation).
- 0.5% THD (FTC) @ rated line voltage: 220 Watts into 2 Ohms (55 Watts Class A operation).
- 1% THD (FTC) @ rated line voltage: 400 Watts into 1 Ohm (27.55 Watts Class A operation).

Rated Output Voltage
HIGH IMPEDANCE SETTING With continuous sine waves from 20Hz-20KHz @ rated line voltage:
- 42 Volts peak into 8 Ohms corresponding to 220 Watts peak.
- 42 Volts peak into 4 Ohms corresponding to 440 Watts peak.
- 40 Volts peak into 2 Ohms corresponding to 800 Watts peak.
- 34.64 Volts peak into 1 Ohm corresponding to 1,200 Watts peak.

LOW IMPEDANCE SETTING with continuous sine waves from 20Hz-20KHz @ rated line voltage:
- 29.66 Volts peak into 4 Ohms corresponding to 220 Watts peak.
- 29.66 Volts peak into 2 Ohms corresponding to 440 Watts peak.
- 28.28 Volts peak into 1 Ohm corresponding to 800 Watts peak.

Rated Output Current
HIGH IMPEDANCE SETTING with continuous sine waves from 20Hz-20KHz @ rated line voltage:
- 5.24 Amps peak into 8 Ohms corresponding to 220 Watts peak.
- 10.48 Amps peak into 4 Ohms corresponding to 440 Watts peak.
- 20 Amps peak into 2 Ohms corresponding to 800 Watts peak.
- 42.43 Amps peak into 1 Ohm corresponding to 1,200 Watts peak.

LOW IMPEDANCE SETTING with continuous sine waves from 20Hz-20KHz @ rated line voltage:
- 7.42 Amps peak into 4 Ohms corresponding to 220 Watts peak.
- 14.84 Amps peak into 2 Ohms corresponding to 440 Watts peak.
- 28.28 Amps peak into 1 Ohm corresponding to 800 Watts peak.

Maximum (clipping) Output Power
HIGH IMPEDANCE SETTING continuous 1 KHz sine-wave power with no more than:
- 1% THD (FTC) @ rated line voltage: 150 Watts into 8 Ohms.
- 1% THD (FTC) @ rated line voltage: 300 Watts into 4 Ohms.
- 1% THD (FTC) @ rated line voltage: 500 Watts into 2 Ohms.
- 1% THD (FTC) @ rated line voltage: 700 Watts into 1 Ohm.

LOW IMPEDANCE SETTING Continuous 1 KHz sine-wave power with no more than:
- 1% THD (FTC) @ rated line voltage: 150 Watts into 4 Ohms.
- 1% THD (FTC) @ rated line voltage: 300 Watts into 2 Ohms.
- 1% THD (FTC) @ rated line voltage: 450 Watts into 1 Ohm.

Maximum (clipping) Output Power
HIGH IMPEDANCE SETTING with continuous 1 KHz sine wave @ rated line voltage:
- 6.12 Amps peak into 8 Ohms corresponding to 300 Watts peak.
- 12.24 Amps peak into 4 Ohms corresponding to 600 Watts peak.
- 22.36 Amps peak into 2 Ohms corresponding to 1,000 Watts peak.
- 37.42 Amps peak into 1 Ohm corresponding to 1,400 Watts peak.

LOW IMPEDANCE SETTING with continuous 1 KHz sine wave @ rated line voltage:
- 8.66 Amps peak into 4 Ohms corresponding to 300 Watts peak.
- 17.32 Amps peak into 2 Ohms corresponding to 600 Watts peak.
- 30 Amps peak into 1 Ohm corresponding to 900 Watts peak.

Maximum (clipping) Output Power
HIGH IMPEDANCE SETTING with continuous 1 KHz sine wave @ rated line voltage:
- 49 Volts peak into 8 Ohms corresponding to 300 Watts.
- 49 Volts peak into 4 Ohms corresponding to 600 Watts peak.
- 44.72 Volts peak into 2 Ohms corresponding to 1,000 Watts peak.
- 37.42 Volts peak into 1 Ohm corresponding to 1,400 Watts peak.

LOW IMPEDANCE SETTING with continuous 1 KHz sine wave @ rated line voltage:
- 34.64 Volts peak into 4 Ohms corresponding to 300 Watts peak.
- 34.64 Volts peak into 2 Ohms corresponding to 600 Watts peak.
- 30 Volts peak into 1 Ohm corresponding to 900 Watts peak.

Small Signal Frequency Response
HIGH IMPEDANCE SETTING
- At 1 Watt into 8 Ohms @ rated line voltage: (+0; -3dB) 4 Hz – 155 KHz.

LOW IMPEDANCE SETTING with continuous 1 KHz sine wave @ rated line voltage:
- at 1 Watt into 4 Ohms @ rated line voltage: (+0; -3dB) 4 Hz – 155 KHz.

Frequency Response
HIGH IMPEDANCE SETTING
- At 1 Watt into 8 Ohms @ rated line voltage: (+0; -3dB) 4 Hz – 155 KHz.

LOW IMPEDANCE SETTING
With continuous 1 KHz sine wave @ rated line voltage:
-  at 1 Watt into 4 Ohms @ rated line voltage: (+0; -3dB) 4 Hz – 155 KHz.

Slew Rate
- Vout = 83.9 Volts peak-to-peak of square-wave signal into 8 Ohms F=10KHz @ rated line voltage: 33.5 Volts per microsecond

Rise Time
- Vout = 83.9 Volts peak-to-peak of square-wave signal into 8 Ohms F=10KHz @ rated line voltage: 2 microseconds

Noise
- Signal/Noise ratio ref. 2.83 Volts RMS into 8 Ohms (1 W): 22 Hz – 22 KHz: typically 68.5 dB | A weighted: typically 75.5 dB
- Signal/Noise ratio ref. 29.7 Volts RMS into 8 Ohms (110 W): 22 Hz – 22 KHz: typically 89 dB | A weighted: typically 96 dB

IM Distortion

HIGH IMPEDANCE SETTING (60Hz:7KHz 4:1) SMPTE:
- from 0.1-110 Watts into 8 Ohms @ rated line voltage: no more than 1%
- from 0.1-220 Watts into 4 Ohms @ rated line voltage: no more than 1%
- from 0.1-400 Watts into 2 Ohms @ rated line voltage: no more than 1.5%
- from 0.1-600 Watts into 1 Ohm @ rated line voltage: no more than 1.5%

LOW IMPEDANCE SETTING (60Hz:7KHz 4:1) SMPTE:
- from 0.1-110 Watts into 4 Ohms @ rated line voltage: no more than 1%
- from 0.1-220 Watts into 2 Ohms @ rated line voltage: no more than 1.5%
- from 0.1-400 Watts into 1 Ohm @ rated line voltage: no more than 2%

Voltage Gain
- Voltage Gain: 39 ± 2% or 31.8 ± 0.2dB.

Inputs
BALANCED 3-pin gold-plated XLR connector. Pin assignment:
- pin 1 = signal ground;
- pin 2 = non-inverting input (+);
- pin 3 = inverting input (-).

NON-INVERTING:
- brass gold plated single-ended RCA connector (connected in parallel with pin 2 of XLR connector).

INVERTING:
- brass gold plated single-ended RCA connector (connected in parallel with pin 3 of XLR connector).

Input Sensitivity
HIGH IMPEDANCE SETTING:
- 0.761 Volts RMS ± 2% for 110 Watts into 8 Ohms.

LOW IMPEDANCE SETTING
- 0.538 Volts RMS ± 2% for 110 Watts into 4 Ohms.
- 0.538 Volts RMS ± 2% for 220 Watts into 2 Ohms.
- 0.513 Volts RMS ± 2% for 400 Watts into 1 Ohm.

Input Impedance
- 41 KOhms shunted by 470pF.

Outputs
- Two sets of brass gold plated binding posts.

Output Impedance
- At 1 KHz: typically 0.082 Ohm. From 20 Hz – 20 KHz: typically 0.082 +0.007/-0.002 Ohm.

Damping Factor
- at 1 KHz: typically 98 re: 8 Ohm. From 20 Hz – 20 KHz: typically 98 +2/-8 re: 8 Ohm.

Operating Temperature
- Operating Temperature: -4 to +104 degrees Fahrenheit (-20 to +40 degrees Celsius) ambient.

Grounding
- Grounding: Separated ground and earth. Floating chassis connected to mains earthing.

Power Supply
- Nominal line voltage: 100-240 Volts 50/60Hz. Input voltage range: ±10%.
- Two power transformers two filter chokes eight separate power supplies.
- AC voltage intensively filtered by special RFI power line filter.

Power Supply Energy Storage
- Power Supply Energy Storage: Approximately 220 joules.

Front Panel Controls
- Front Panel Controls: LED control.

Rear Panel Connectors and Controls
- POWER SWITCH.
- LOAD SWITCH.
- AC POWER INLET.
- AC MAINS FUSE along with the corresponding fuse holder.
- One input XLR connector gold-plated.
- Two input RCA connectors gold-plated.
- Two sets of gold-plated SPEAKER BINDING POSTS.
- Two DC power jacks (central pin 2mm dia.) for connecting remote link cables.
- EARTHING (GROUNDING) post gold-plated.

Features
- AC voltage selector: 100/120/220/230/240 Volts internally switchable.
- Transformer hum reducer: Special circuit reduces power transformer core saturation and residual mechanical hum.
- Ultra low-noise power transformer: Custom-made toroidal power transformer has no mechanical contact with either the transformer cover or the chassis as transformer 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.
- Bias setting (load) switch: Switch-selectable biasing circuit maintains pure Class A operation of the output stage for all load conditions between 4-16 Ohms.
- Remote control: Power on/off. Available remote link cable coordinates the remote functions of two or more amplifiers.
- Safety/Protection: “Soft-start” circuit protects power supply components from large in-rush currents when the amplifier is turned on.
- Protection against possible damages from high voltage transients on AC power line.
- Thermal resetting fuse connected in series with AC mains fuse controls heat-sink temperature.
- Threshold: 176 degrees Fahrenheit (80 degrees Celsius).
- Thermal resetting fuse controls internal temperature of the power transformer.
- Threshold: 248 degrees Fahrenheit (120 degrees Celsius).
- Unique electronic protection circuit guards against accidental abuse (e.g. overload shorts across the output excessive DC at the input or output etc.).
- AC voltage fuses:
6.25 Amps slo-blo for 100/120 Volts (3 Amps slo-blo for 220/230/240 Volts);
0.125 Amps slo-blo for 100/120/220/230/240 Volts internally mounted.

POWER CONSUMPTION
- Nominal: Typically 330 Watts @ rated output @ 8(4) Ohms (class A operation) and at idle.
- Maximum: Typically 750 Watts @ rated output @ 1 Ohm (low impedance setting).
- Burn-in Time at Factory: Minimum 72 hours. Recommended Burn-in Time in End-user’s System: Minimum 200 hours.
- Warm-up time: Minimum 45 minutes.

DIMENSIONS
- 8.25″(21cm) H x 17″(43.2cm) W x 19.5″(49.5cm) D. [add 2.8125″(7.14cm) of depth for front and rear handles].
- Unit weight: 68.5 Lbs (31 Kg).
- Shipping weight: 94 Lbs (42.7 Kg).
- Tube Complement: V101 – 6922 (second amplification stage)
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