ML3 SINGLE-ENDED VACUUM

LAMM Audio
  • 详细说明
  • 产品参数

The ML3 is a single-ended (SE) tube amplifier utilizing a very powerful direct-heated triode GM-70 (125W plate dissipation) and a separate power supply. Combining the most sophisticated technologies and electronic design with graceful looks reminiscent of the classic era of tubes, the ML3 is our top-of-the-line, no-compromise product.
It is a 32-watt amplifier that operates in pure class A and utilizes no overall feedback. The topology is absolutely unique and incorporates one of the most advanced power supplies ever featured in an audio device. These factors, along with the designer’s unique vision and understanding of the underlying principles of audio electronics, make the ML3 an amplifier without peer.

 

Power Output

 

 


32 Watts into 16, 8, or 4 Ohms.

Rated Output Power

 

minimum continuous sine-wave power,
at 1 KHz with no more than:
0.3% THD (FTC) @ rated line voltage
3% THD (FTC) @ rated line voltage
0.3% THD (FTC) @ rated line voltage
3% THD (FTC) @ rated line voltage
0.3% THD (FTC) @ rated line voltage
3% THD (FTC) @ rated line voltage

 


1 Watt into 16 Ohms.
30 Watts into 16 Ohms.
1 Watt into 8 Ohms.
30 Watts into 8 Ohms.
1 Watt into 4 Ohms.
30 Watts into 4 Ohms.

Rated Output Voltage

 


with continuous sine waves,
at 1 KHz @ rated line voltage:

 

30.98 Volts peak into 16 Ohms, corresponding to 60 Watts peak.
21.91 Volts peak into 8 Ohms, corresponding to 60 Wattspeak.
15.49 Volts peak into 4 Ohms, corresponding to 60 Wattspeak.

Rated Output Current

 


with continuous sine waves,
at 1 KHz z @ rated line voltage:

 

1.94 Amps peak into 16 Ohms, corresponding to 60 Watts peak.
2.74 Amps peak into 8 Ohms, corresponding to 60 Wattspeak.
3.87 Amps peak into 4 Ohms, corresponding to 60 Wattspeak.

Maximum Output Power

 


maximum continuous sine-wave power,
at 1 KHz, with no more than:
5% THD (FTC) @ rated line voltage
5% THD (FTC) @ rated line voltage
5% THD (FTC) @ rated line voltage

 

37 Watts into 16 Ohms.
37 Watts into 8 Ohms.
37 Watts into 4 Ohms.

Maximum Output Voltage

 


with continuous sine waves,
at 1KHz @ rated line voltage:

 

34.41 Volts peak into 16 Ohms, corresponding to 74 Watts peak.
24.33 Volts peak into 8 Ohms, corresponding to 74 Wattspeak.
17.2 Volts peak into 4 Ohms, corresponding to 74 Wattspeak.

Maximum Output Current

 


with continuous sine waves,
at 1KHz @ rated line voltage:

 

2.15 Amps peak into 16 Ohms, corresponding to 74 Watts peak.
3.04 Amps peak into 8 Ohms, corresponding to 74 Wattspeak.
4.3 Amps peak into 4 Ohms, corresponding to 74 Wattspeak.

Small Signal Frequency Response

 

at 1 Watt into 16 Ohms @ rated line voltage:

(0, -3dB) 8.5 Hz - 32 KHz.

Frequency Response

 

at 30 Watt into 16 Ohms @ rated line voltage:

(0, -1.5dB) 20 Hz - 20 KHz.

Slew Rate

 


Vout=61.96 Volts peak-to-peak of
square-wave signal into 16 Ohms,
F=10KHz @ rated line voltage:




5 Volts per microsecond

Rise Time

 

.
Vout=61.96 Volts peak-to-peak of
square-wave signal into 16 Ohms,
F=10KHz @ rated line voltage:

.


10 microseconds

Fall Time

 

.
Vout=61.96 Volts peak-to-peak of
square-wave signal into 16 Ohms,
F=10KHz @ rated line voltage:

.


10 microseconds

Noise

 

.
Signal/Noise ratio ref. 4 Volts RMS
into 16 Ohms (1 Watt):
22 Hz – 22 KHz
A weighted
Signal/Noise ratio ref. 21.91 Volts RMS
into 16 Ohms (30 Watts):
22 Hz – 22 KHz
A weighted

.



typically 86 dB.
typically 92 dB.


typically 100 dB.
typically 106 dB.

IM Distortion
(60Hz:7KHz 4:1) SMPTE:

 

.
from 1-30 Watts into 16 Ohms
@ rated line voltage:
from 1-30 Watts into 8 Ohms
@ rated line voltage:
from 1-30 Watts into 4 Ohms
@ rated line voltage:

.

no more than 10%

no more than 10%


no more than 10%

Voltage Gain

 

30 Watts into 16 Ohms:
30 Watts into 8 Ohms:
30 Watts into 4 Ohms:

25.78 + 2% or 28.22 + 0.2dB.
18.26 + 2% or 25.2 + 0.2dB.
12.89 + 2% or 22.2 + 0.2dB.

Inputs

 


Pseudo-balanced, non-inverting:








Single-ended, non-inverting:


3-pin XLR connector.
Pin assignment:
pin 1 = signal ground;
pin 2 = signal input;
pin 3 = signal ground.
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

 

30 Watts into 16, 8, and 4 Ohms:

0.85 Volts RMS ± 2%

Input Impedance

 

 

41 KOhms shunted by 470pF.

Outputs

 

 


Eight gold- plated binding posts.

Output Impedance

 


at 1 KHz:

from 30 Hz – 20 KHz:


Typically 6.2 Ohms; 16-Ohm tap.
typically 3.1 Ohms; 8-Ohm tap.
typically 1.55 Ohms; 4-Ohm tap.
typically 6.2 +1.5/-0.1 Ohms; 16-Ohm tap.
typically3.1 +0.75/-0.05 Ohms; 8-Ohm tap.
typically 1.55 +0.375/-0.025 Ohms; 4-Ohm tap.

Damping Factor

 


at 1 KHz:



from 30 Hz – 20 KHz:


typically 2.58 re: 16-Ohm load.
typically 2.58 re: 8-Ohm load.
typically 2.58 re: 4-Ohm load.

typically 2.58 +0.043/-0.5 re: 16-Ohm load.
typically 2.58 +0.043/-0.5 re: 8-Ohm load.
typically 2.58 +0.043/-0.5 re: 4-Ohm load.

Operating Temperature

 

 


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

Grounding

 

 


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

Power Supply

 


nominal line voltage
Input voltage range


100-240 Volts, 50/60Hz.
±10%.
Two power transformers, one filament transformer, six filter
chokes, seven separate power supplies, six rectifier tubes.
AC voltage intensively filtered by special RFI power line filter.

Power Supply Energy Storage

 

 


Approximately 265 joules.

Front/Rear Panel Controls and
Chassis Connectors & Controls

 


ML3

 


Front Panel Controls


LED control.

Chassis Connectors and Controls

MULTI-TURN TRIMMING POTENTIOMETER for setting the nominal value of plate current of the output tube V1.
Set of TESTPOINTS for measuring the value of plate current of the output tube by using an external voltmeter.
Plate FUSE for the output tube, along with corresponding fuse-folder.
LOCAL NFB ON-OFF switch, allowing to introduce small
amounts of local feedback in the output stage.
NFB1 - NFB2 switch, allowing to vary the amounts of local feedback (2.4dB and 1.2dB, respectively).
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).

Rear Panel Connectors and Controls

Eight gold- plated BINDING POSTS.
PANEL RECEPTACLE, MALE for connecting the power supply cable.

ML3-PS

 

Front Panel Controls

LED control.

Chassis Connectors and Controls

Six RECTIFIER TUBES (V101 – V106).

Rear Panel Connectors and Controls

POWER SWITCH.
AC POWER INLET.
AC MAINS FUSE, along with corresponding fuse-holder.
FRONT-END PLATE FUSE, along with corresponding fuse-holder.
PANEL RECEPTACLE, FEMALE, for connecting the power supply cable.
Two DC POWER JACKS (central pin 2mm dia.) for connecting remote control/link cables.
GROUNDING (EARTHING) POST (gold plated).

Features

 

AC voltage selector

100/120/220/230/240 Volts, internally switchable.


Ultra low-noise power and filament transformers


Custom-made torodial power transformers have no mechanical contact with either the transformer covers or the chasses, as transformers are 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.


Wide-band output transformer


Custom-made output transformer especially designed for handling high voltage power triodes and assuring the reproduction of a full spectrum of audio frequencies at any level of output power up to the maximum specified.


Remote control


Power on/off.
Available remote link cable coordinates the remote functions of two or more amplifiers.


Safety/Protection


"Soft-start" circuit along with vacuum tube rectifiersprotects 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.
Unique delay time and electronic protection circuits secure the delay of approximately 45 seconds before connecting a speaker to the amplifier's output upon its turn-on and also an instant disconnecting of a speaker upon the amplifier's turn-off. That excludes the unpleasant thumps or transients in the system.
Thermal resetting fuse controls internal temperature of the power transformer.
Threshold: 248 degrees Fahrenheit
(120 degrees Celcius)
Fuses:

6.25 Amps slo-blo for 100/120 Volts (ML3-PS),

3 Amps slo-blo for 220/230/240 Volts (ML3-PS),

0.125 Amp slo-blo for on/off and
remote control circuitry,
internally mounted (ML3-PS),

0.125 Amp slo-blo Front-End Plate fuse (ML3-PS),

0.5 Amp fast-acting Plate fuse for the
output tube (ML3).

General

 

Power Consumption

Typically 400 Watts @ rated output @ 16 (8, 4) Ohms and at idle.

Burn-in Time at Factory:

Minimum 72 hours.

Recommended Burn-in Time in End-user's System:

Minimum 100 hours.

Warm-up time:

Minimum 25 minutes.


Unit dimensions (ML3 and ML3-PS):




Crate dimensions (ML3 and ML3-PS):


8.25 inches (21cm) high x 16 inches (40.64cm) wide x
20.375 inches (51.75cm) deep
[add 1.4375 inches (3.7cm) of depth for handles located on rear panel]

26" x 21" x 14" (66.04cm x 53.34cm x 35.56cm)


Unit weight
ML3

ML3-PS



79 Lbs (35.9 Kg).

80.2 Lbs (36.41 Kg).


Shipping weight
ML3

ML3-PS



99 Lbs (44.95 Kg).

100.2 Lbs (45.5 Kg).

.
Tube Complement
ML3













ML3-PS


.
V101 - 12AX7/ECC83, first amplification stage;

V102, V103, V104, V105 -
- 6N30P-DR / 6H30П-ДР (original),
second amplification stage;

V1 – GM-70, output stage.
NOTE: we recommend replacing GM-70 tube about once every 1-1.5 years to maintain the best performance of the amp

V101, V102, V103, V104, V105, V106 -
- 12AX3 / 12BE3, rectifier tubes

 

输出功率:32W(16, 8, 4Ohms)

额定输出电压:30.98V(16Ohms)、21.91V(8Ohms)、15.49V(4Ohms)

额定输出电流:1.94A(16Ohms)、2.74A(8Ohms)、3.87A(4Ohms)

频率响应:20Hz-20KHz(-1.5dB、30W)

转换速率:5V/ms

上升速率:10ms

信噪比(A计权):92dB(1W)、106dB(30W)

失真:≤10%

电压增益:25.78+2% or 28.22+0.2dB(16 Ohms)、18.26+2% or 25.2+0.2dB(8Ohms)、12.89+2% or 22.2+0.2dB(4Ohms)

输入灵敏度:0.85V(RMS ±2%、30W)

输入阻抗:41KOhms

耗电:400W

工厂老化:72小时

系统热身:100小时

热机:25分钟

体积(HWD):21×40.64×51.75cm

重量:35.9Kg(主机)、36.41Kg(电源)

使用电子管:
主机:12AX7/ECC83×1、6N30P-DR/6H30П-ДР×4、GM-70×1
电源:12AX3/12BE3×6

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