LAMM ML2.2

LAMM ML2.2

Single-Ended Vacuum Tube Monoblock / Pair

LAMM ML2.2
LAMM ML2.2
LAMM ML2.2
LAMM ML2.2
LAMM ML2.2
LAMM ML2.2
LAMM ML2.2
LAMM ML2.2
LAMM ML2.2
45.590,00 Price include 21% VAT Price exclude VAT € 37.677,69
AVAILABILITY1 MONTH
The Lamm ML2.2 is the sonic result of a seamless fusion of the ML2.1 and ML3 Signature that leaves the listener totally immersed in the music performance as well as pleasantly surprised at the palpable breathing presence of the music material. The ML2.2 is an amplifier that sonically is much closer to the ML3 Signature while price-wise is closer to the ML2.1. The meticulous build quality, high quality of parts and materials along with innovative topology make the ML2.2 a truly prized possession of any music lover.

The ML2.2 single-ended power amplifier is a proud successor in a line of the ML2 series and represents a new generation of single-ended power amplifiers with regulated power supply employing a unique high current low impedance power vacuum tube triodes 6C33C in both output stage and power supply. Implementation of these triodes allows for 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.

Chosen by the Design and Engineering Committee to receive the Innovations Award at the International Consumer Electronics Show in Las Vegas as the most innovative product of the year in the “specialty audio” category, the ML2 was one of the first single-ended amplifiers on the market capable of reproducing a full range of audio frequencies and recreating the original spectral balance and harmonic structure of the recorded material with almost 100% accuracy. Vladimir Lamm’s unique vision and nuanced grasp of audio electronics has created an amplifier capable of capturing the essence of your favorite music like never before.

The output stage with its high-current voltage regulator section grows out of that in the ML2.1 and implements certain changes that relate specifically to the use of most recently introduced parts of higher quality. In contrast to the output stage, the input stage has been totally redesigned and is based on that of the ML3 Signature amplifier. This innovative front-end topology was incorporated because of specific characteristics of the output tube. It brought about a dramatic step forward in sound quality while keeping the cost within the price category of the ML2.1.

Single-ended tube amplification has the greatest potential of reproducing music with maximum fidelity to live sound. Because of several inherent limitations of the format, most SE tube amplifiers recreate a beautiful midrange but shortchange the low and upper frequencies. The ML2.2 overcomes these limiting factors to reproduce the thrilling sound of live music.

The ML2.2 along with the ML3 Signature are the only single-ended tube amplifiers that reproduce the entire spectrum in the audio frequency range. A midrange to die for supports a superbly natural and extended bass along with exquisite upper frequencies. The amplifier’s innovative circuitry allows one to hear the original spectral balance and harmonic structure of the recorded material without loosing the smallest of detail and nuance.

Another unmatched feature of the ML2.2 is the breathtaking, transparent, three-dimensional soundstage it throws seemingly without boundaries or limitations. The ML2.2 brings you a very natural and engaging sound.

Advanced technical solutions are used in the design of the ML2.2. Custom-made output transformer of very high quality and unique front-end and output stages, plus the sophisticated power supply, free the ML2.2 to drive most real-world-load speakers yielding effortlessly dynamic sound.

The ML2.2 features the following upgrades and modifications as compared to the ML2.1:
- New power transformer
- Input stage totally redesigned and based on that of the ML3 Signature amplifier.
- Five filter chokes (compared to two in the ML2.1)
- Plate fuse holder located on top of the amplifier’s chassis for greater customer convenience
- Utilization of a much higher quality pc-board, and parts and materials that have become available in recent years
- Introduction of an option to turn the amp on/off remotely

Each ML2.2 is handcrafted of the finest materials and top quality parts like military-grade DALE metal-film resistors, PRC wire-wound resistors, CADDOCK power-film resistors, BOURNS multi-turn potentiometers, CORNELL DUBILIER and UNITED CHEMI-CON electrolytic capacitors, ELECTROCUBE and ROEDERSTEIN film capacitors, HAMMOND chokes, gold-plated NEUTRIC connectors, gold-plated binding posts, and military-grade low-noise long-life vacuum tubes. The power and output transformers have no mechanical contact with either the transformer cover or the chassis; they’re suspended in a special encapsulant material that almost completely absorbs residual mechanical vibrations. This feature plays a significant role in assuring the unique clarity and micro resolution during sound reproduction. Two multi-turn trimming potentiometers accessible through special openings in the amplifier’s chassis, along with two sets of test points, allow the user to adjust and measure the nominal value of plate voltage and plate current of the output tube by using an external voltmeter. In conceiving and executing the overall design of the ML2.2, the goal was to utilize modern technology and processes while recreating a look reminiscent of the long-gone vacuum tube era. The ML2.2 functions on around-the-world AC line voltages.

Specifications

Rated Output Power minimum continuous sine-wave power, from 20Hz-20KHz with no more than:
- 0.7% THD (FTC) @ rated line voltage > 1 Watt into 16 Ohms.
- 3% THD (FTC) @ rated line voltage > 18 Watts into 16 Ohms.
- 0.7% THD (FTC) @ rated line voltage > 1 Watt into 8 Ohms
- 3% THD (FTC) @ rated line voltage > 18 Watts into 8 Ohms..
- 0.7% THD (FTC) @ rated line voltage > 1 Watt into 4 Ohms.
- 3% THD (FTC) @ rated line voltage > 18 Watts into 4 Ohms.

Rated Output Voltage with continuous sine waves from 20Hz-20KHz @ rated line voltage:
- 24 Volts peak into 16 Ohms, corresponding to 36 Watts peak.
- 16.97 Volts peak into 8 Ohms, corresponding to 36 Watts peak.
- 12 Volts peak into 4 Ohms, corresponding to 36 Watts peak.

Rated Output Current with continuous sine waves from 20Hz-20KHz @ rated line voltage:
- 1.5 Amps peak into 16 Ohms,corresponding to 36 Watts peak.
- 2.1 Amps peak into 8 Ohms,corresponding to 36 Watts peak.
- 3 Amps peak into 4 Ohms, corresponding to 36 Watts peak.

Maximum Output Power with continuous sine-wave power, at 1 KHz, with no more than 5% THD (FTC) @ rated line voltage:
- 21 Watts into 16 Ohms.
- 20 Watts into 8 Ohms.
- 20 Watts into 4 Ohms.

Maximum Output Voltage with continuous sine-waves at 1Khz @ rated line voltage:
- 25.92 Volts peak into 16 Ohms, corresponding to 42 Watts peak.
- 17.89 Volts peak into 8 Ohms, corresponding to 40 Watts peak.
- 12.65 Volts peak into 4 Ohms, corresponding to 40 Watts peak.

Maximum Output Current with continuous sine-waves at 1Khz @ rated line voltage:
- 1.62 Amps peak into 16 Ohms, corresponding to 42 Watts peak.
- 2.24 Amps peak into 8 Ohms, corresponding to 40 Watts peak.
- 3.16 Amps peak into 4 Ohms, corresponding to 40 Watts peak.

Small Signal Frequency Response At 1 Watt into 16 Ohms @ rated line voltage:
- (-3dB) 3 Hz, 80 KHz.

Frequency Response at 18 Watt into 16 Ohms @ rated line voltage:
- (-0.3dB) 20 Hz, 20 KHz.

Slew Rate
- Vout=48 Volts peak-to-peak of square-wave signal into 16 Ohms, F=10KHz @ rated line voltage: 15 Volts per microsecond

Rise Time
- Vout=48 Volts peak-to-peak of square-wave signal into 16 Ohms, F=10KHz @ rated line voltage: 2.5 microseconds

Noise
- Signal/Noise ratio ref. 4 Volts RMS into 16 Ohms (1 Watt): 2 Hz – 22 KHz: typically 87 dB. | A weighted: typically 90 dB.
- Signal/Noise ratio ref. 16.97 Volts RMS into 16 Ohms (18 Watts): 22 Hz – 22 KHz: typically 99.5 dB. | A weighted: typically 102 dB.

Voltage Gain
- 19.97 ± 2% or 26 ± 0.2dB into 16 Ohms.
- 14.12 ± 2% or 23 ± 0.2dB into 8 Ohms.
- 9.98 ± 2% or 19.98 ± 0.2dB into 4 Ohms.

IM Distortion (60Hz:7KHz 4:1) SMPTE:
- from 1-18 Watts into 16 Ohms @ rated line voltage: no more than 8%
- from 1-18 Watts into 8 Ohms @ rated line voltage: no more than 8%
- from 1-18 Watts into 4 Ohms @ rated line voltage: no more than 8%

Inputs
- Pseudo-balanced, non-inverting: 3-pin XLR connector.
- 3-pin XLR pin assignment: pin 1 = signal ground; pin 2 = non-inverting signal input; pin 3 = signal ground.
- Single-ended, non-inverting: gold plated RCA connector (connected in parallel with pin 2, non-inverting input of XLR connector).
- ONLY ONE OF THESE INPUTS SHOULD BE CONNECTED TO A PREAMPLIFIER AT THE SAME TIME!

Input Sensitivity
- 18 Watts into 16, 8, and 4 Ohms > 0.85 Volts RMS ± 2%

Input Impedance
- 41 KOhms shunted by 470pF.

Outputs
- Three sets of gold plated binding posts for 4-, 8-, and 16-Ohm loads.

Output Impedance at 1 KHz:
- typically 1.68 Ohms; 16-Ohm tap.
- typically 0.84 Ohms; 8-Ohm tap.
- typically 0.42 Ohms; 4-Ohm tap.
from 30 Hz – 20 KHz:
- typically 1.68 ± 0.14 Ohms; 16-Ohm tap.
- typically 0.84 ± 0.07 Ohms; 8-Ohm tap.
- typically 0.42 ± 0.035 Ohms; 4-Ohm tap.

Damping Factor at 1 KHz:
- typically 9.5 re: 16-Ohm load.
- typically 9.5 re: 8-Ohm load.
- typically 9.5 re: 4-Ohm load.
From 30 Hz – 20 KHz:
- typically 9.5 ± 0.7 re: 16-Ohm load.
- typically 9.5 ± 0.7 re: 8-Ohm load.
- typically 9.5 ± 0.7 re: 4-Ohm load.

Operating Temperature
- Operating Temperature: +23 to +104 degrees Fahrenheit (-5 to +40 degrees Celsius) ambient.

Grounding
- Grounding (earthing) post and chassis connected to mains earthing.

Power Supply
- Nominal line voltage: 100-240 Volts 50/60Hz. Input voltage range: ±10%.
- Two power transformers, five filter chokes, six separate power supplies, including high current vacuum tube voltage regulator for the output stage.
- AC voltage intensively filtered by special RFI power line filter.

Power Supply Energy Storage
- Power Supply Energy Storage: Approximately 160 joules.

Front Panel Controls
- Front Panel Controls: LED control.

Rear Panel Connectors and Controls
- AC POWER SWITCH.
- AC POWER INLET.
- AC MAINS FUSE along with the corresponding fuse holder.
- Three sets of gold plated BINDING POSTS.
- Two DC POWER JACKS (central pin 2mm dia.) for connecting remote control/link cables.
- GROUNDING (EARTHING) POST gold plated.
- Chassis Connectors and Controls.
- Two DC power jacks (central pin 2mm dia.) for connecting remote link cables.
- EARTHING (GROUNDING) post gold-plated.
- MULTITURN TRIMMING POTENTIOMETER for setting the nominal value of plate voltage of the output tube.
- MULTITURN TRIMMING POTENTIOMETER for setting the nominal value of plate current of the output tube.
- Set of testpoints for measuring the value of plate voltage of the output tube by using the external voltmeter.
- Set of testpoints for measuring the value of plate current of the output tube by using external voltmeter.
- One input RCA connector, gold-plated (located on the left side of the chassis).
- One input XLR connector, gold-plated (located on the left side of the chassis).

Features
- AC voltage selector: 100/120/220/230/240 Volts internally switchable.
- Ultra low-noise power transformer:
- Custom-made torodial power transformer has no mechanical contact with either the transformer cover or the chassis, as transformer is suspended in a special encapsulant which 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.
- Wide-band output transformer:
- Custom-made torodial power transformer has no mechanical contact with either the transformer cover or the chassis, as transformer is suspended in a special encapsulant which 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.
- 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.Unique delay time and electronic protection circuits secure the delay of approximately 2 minutes in supplying the plate voltage to the output tube, which extends the tube life span and excludes the unpleasant thumps or transients in the system during the amplifier turn on/off.Thermal resetting fuse controls internal temperature of the power transformer.Threshold: 248 degrees Fahrenheit (120 degrees Celcius)
- Fuses:
4 Amps slo-blo for 100/120 volts;
2 Amps slo-blo for 220/230/240 Volts;
1.25 Amps fast-acting plate fuse for the output tube (V2);
0.125 Amp slo-blo for on/off and remote control circuitry, internally mounted.

General
- Power Consumption: Typically 245 Watts @ rated output @ 16 (8,4) Ohms.
- 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.
- Unit dimensions: 8.25 inches (21cm) high x 16 inches (40.64cm) wide x 20.375 inches (51.75cm) deep [add 1.3125 inches (3.3cm) of depth for handles located on rear panel]
- Crate dimensions: 26″ x 21″ x 14″ (66.04cm x 53.34cm x 35.56cm)
- Unit weight: 81 Lb (36.8 Kg).
- Shipping weight: 107 Lbs (48.6 Kg).
- Tube Complement Amplifier section:
one 12AX7/ECC83, first amplification stage;
two 6N6P, second amplification stage;
one 6C33C-B, output stage.

NOTE: we recommend replacing 6N6P tubes about once every two years to maintain the best performance of the amplifier.
Tube Complement voltage regulation section:
- one 5651, voltage reference tube.
- one 6AK5/5654, voltage regulator tube;
- one 6C33C-B, voltage regulator tube.