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Lamm Industries
LL1 Signature Tube Preamplifier

AED 120,000.00 (Inc. Tax)

(Price Per Set)

Only 1 left in stock

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The monaural line-level preamplifier model LL1 Signature is the ultimate statement of perfection in High-End audio. Just like the ML3 Signature Amplifier is the best creation of its designer’s professional career among the LAMM amplifiers, so is the LL1 Signature among the line-level LAMM preamplifiers.

The LL1 Signature has been designed to complement the ML3 Signature amplifier, and this combination in a system represents a “match made in heaven”. However, the LL1 Signature will perform magic with any other appropriate power amplifier.

Fully serviced at the original factory and in original wooden crates.

Orders ship Sunday through Friday from our offices in Dubai, UAE.

In-stock products typically ship within 48 hours and should be expected to arrive in 3-4 business days. Orders outside of the UAE should be expected to arrive in 5-7 business days.

Pre-order and backorder products will state the approximate delivery timeline beside the Add To Cart button.

If you would like to place a custom order, chat with our specialists for a guided shopping experience. Once your order has been placed, a timeline will be provided depending on your order details.

- Free delivery within the UAE
- Shipping charges will be calculated upon checkout for orders outside of the UAE (Bahrain, Oman, Kuwait, Saudi Arabia & Qatar).
- Taxes and duties are calculated according to the applicable laws of the state or country an item is shipped to and are the customer's responsibility.

For additional information on shipping and our exchange & return policy visit our help center.

Installation charges are applicable and can be paid upon delivery for our clients based in Dubai.

- Installation Charges: AED 350 Per Hour
- Speaker Cables: AED 15 Per Meter
- Trunking: AED 10 Per Meter

For clients based outside of the UAE, please contact our specialists and we will share an estimate based on your requirements.


The LL1 Signature features a topology that brings out the most natural sound performance in the audio path. In principle, it is a single-stage unit that basically represents the shortest possible signal path.

The preamplifier contains four very linear low impedance triodes paralleled into a single inverting gain stage.

The LL1 Signature employs a pure single-ended class-A operation, with no overall feedback applied. Also featured are specially selected high-transconductance dual triodes 6N30P-DR/ 6Н30П-ДР (original) in the signal path and TKD stepped potentiometers for volume control - the best available on today's market.

The preamplifier's audibly neutral power supply features a full-wave vacuum rectifier. This rectifier, together with a choke-containing filter, allows to practically get rid of the hum and buzz and, in the end, ensures the verity of dynamic range without coloration. Two solid-state analog voltage regulators supply dc voltage to the tube filaments (heaters).

Other features include 3 inputs, one tape/HT processor loop, attenuator (-12 dB) switch, output 1/output 2 switches, protection circuitry designed to enable manual muting of the output signal, and built-in remote on/off for LAMM power amplifiers.

The main distinction of the LL1 Signature from any other comparable type of preamplifiers is its practically inaudible sonic signature. When connected to an appropriate type of power amplifier, especially LAMM power amplifiers, it assures the extraordinary transparency of perceived sound and recreation of a three-dimensional soundstage in the home, recording studio, etc., without boundaries and limitations.

Each preamplifier is handcrafted of the finest materials and top quality parts like military-grade DALE metal-film resistors, PRC wire-wound resistors, BOURNS multi-turn potentiometers, CORNELL DUBILIER, and UNITED CHEMI-CON electrolytic capacitors, ELECTROCUBE, ELCON and ROEDERSTEIN film capacitors; HAMMOND chokes, gold-plated NEUTRIK connectors, and military-grade low-noise long-life vacuum tubes.

A custom-designed massive damping panel installed in the preamplifier unit significantly reduces all types of mechanical vibrations which, in turn, leads to a more extended, coherent, and natural bass reproduction.

The LL1 Signature features a custom-designed super-low noise power transformer.

The LL1 Signature works on all world AC line voltages (100/120/220/230/240V).
- Pure class A, single-stage zero-feedback design, providing the shortest signal path possible.

- Four low internal impedance (about 800 Ohms per triode!) very linear medium-mu duo triodes are connected in parallel, thus minimizing the internal noise of the preamplifier and ensuring the unprecedentedly low output impedance for this type of topology.

- High-current drive capability, in combination with unique single-ended class-A circuitry, assures the preamplifier's capability to drive any cable and any real-world load, while maintaining its practically inaudible sonic signature.

- A specially designed damping panel was installed in the LL1 Signature preamplifier effectively isolates all sensitive electronic components from any induced resonances.

- Absolutely outstanding signal-to-noise ratio makes the LL1 Signature one of the quietest line-stage preamplifiers available on the market.

-
This design is unique to LAMM INDUSTRIES, INC.
- Rated Output Voltage
from 20Hz-20KHz into 41-KOhm load 1 Volt RMS.
- Voltage Gain 7.43 ± 2% or 17.43 ± 0.2dB.
- Attenuation 3.98 ± 2% or 12 ± 0.17dB.
- Absolute Phase Inverting.
- Frequency Response
from 1-50 Volts RMS into 41-KOhm load
(-0.1dB) 20 Hz - 20 KHz.
(-3dB) 5 Hz -140 KHz.
- Slew Rate
Vout=36 Volts peak-to-peak of square-wave signal, F=10KHz; into 41-KOhm load
47 Volts per microsecond.
- Rise Time
Vout=36 Volts peak-to-peak of square-wave signal, F=10KHz; into 41-KOhm load
0.61 microseconds.
- Total Harmonic Distortion from 20 Hz - 20 KHz
Vout=1 Volt RMS into 41-KOhm load
Vout=50 Volts RMS into 41-KOhm load
no more than 0.03%
no more than 1%
Vout=1 Volt RMS into instrument load
Vout=50 Volts RMS in to instrument load
no more than 0.03%
no more than 1%
Vout=1 Volt RMS into IHF load
Vout=30 Volts RMS into IHF load
no more than 0.03%
no more than 1%
- IM Distortion
(60Hz:7KHz 4:1) SMPTE:
Vout = 1 Volt RMS into 41-KOhm load
Vout = 10 Volts RMS into 41-KOhm load
no more than 0.09%.
no more than 1%
Vout = 1 Volt RMS into instrument load
Vout = 10 Volts RMS into instrument load
no more than 0.09%
no more than 1%
Vout = 1 Volt RMS into IHF load
Vout = 10 Volts RMS into IHF load
no more than 0.09%
no more than 1%
- Inputs Unbalanced, gold plated single-ended RCA connectors.
- Input Sensitivity
Vout = 1 Volt RMS into 41-KOhm load
0.135 Volts RMS ± 2%.
- Input Impedance
F=1KHz Typically 16.5 KOhms.
- Outputs
Unbalanced, gold plated single-ended RCA connectors.
Pseudo-balanced, 3-pin gold plated XLR connectors.
Pin assignment:
pin 1 = signal ground;
pin 2 = signal output;
pin 3 = not connected.
- Corrected Output Impedance
F=1KHz typically 200 Ohms.
- Noise
signal-to-noise ratio, below 2 Volts RMS output, unweighted
better than 87 dB.
signal-to-noise ratio, below 2 Volts RMS output, 22Hz - 22KHz
better than 90 dB.
signal-to-noise ratio, below 2 Volts RMS output, A-weighted
better than 97 dB.
- Operating Temperature
-4 to +104 degrees Fahrenheit
(-20 to +40 degrees Celsius) ambient.
- Power Supply
nominal line voltage
100-240 Volts, 50/60Hz.
Input voltage range ±10%.
One power transformer, two vacuum tube rectifiers, four filter chokes, one high voltage (350 vdc) high energy power supply, two solid-state analog non-switching voltage regulators.
AC voltage intensively filtered by special RFI power line filter.
- Front/Rear Preamplifier
Front Panel Controls
- LED control.
- OUTPUT LEVEL control.
- SELECTOR switches.
- MONITOR switches.
- ATTENUATOR (-12dB) switch.
- MUTING switch.
- OUTPUT 1 switch.
- OUTPUT 2 switch.
Rear Panel Connectors and Controls
- Four INPUT CONNECTORS RCA for line inputs and TAPE (play).
- One OUTPUT CONNECTOR RCA for TAPE (record).
- Three OUTPUT CONNECTORS RCA (single-ended outputs).
- Three gold-plated XLR CONNECTORS (pseudo-balanced outputs).
- One XLR CONNECTOR (6 pins, gold-plated) for connecting the power supply cable.
Front/Rear 1Preamplifier Power Supply
Front Panel Controls
- POWER switch.
- OUTLETS switch.
- REMOTE 1 turn-on/off switch for LAMM power amplifiers.
- REMOTE 2 turn-on/off switch for LAMM power amplifiers.
- Four LED controls.
Rear Panel Connectors and Controls
- IEC 320 POWER INLET (3 lug).
- Two AC OUTLETS, switched.
- One XLR CONNECTOR (6 pins, gold-plated) for connecting the power supply cable.
- Two REMOTE CONTROL plugs.
- EARTHING POST (gold plated).
- AC voltage selector 100/120/220/230/240 Volts, internally switchable.
- Remote Control A special built-in circuit enables the remote turn on/off of LAMM power amplifiers. Available remote link cable coordinates the remote functions of two or more amplifiers.
- Safety Unique electronic protection circuit enables muting of the outputs until the preamplifier is stabilized after a turn-on, as well as the functioning of the preamplifier in a "muting" mode during operation, and automatic switching to muting in case the AC line drops or is interrupted.
Plate voltage overload protection:
0.3 Amps slo-blo fuse, internally mounted.
- AC voltage fuses:
2 Amps slo-blo for 100/120 Volts,
1 Amp slo-blo for 220/230/240 Volts,
internally mounted.

General

Power Consumption Typically 96 Watts.
Burn-in Time at Factory Minimum 72 hours.
Recommended Burn-in Time in End-user's System Minimum 80 hours.
Warm-up time Minimum 25 minutes.

Unit dimensions (identical for preamplifier and power supply):
4.5 inches high x 19 inches wide x 13.875 deep + 1.375 inches for front handles.
Crate dimensions: 23" x 19" x 10" (58.42cm x 48.26cm x 25.4cm)

Unit weight
preamplifier 35.8 Lbs (16.2 Kg)
power supply 21.2 Lbs (9.6 Kg)

Shipping weight
preamplifier 53.8 Lbs (24.4 Kg)
power supply 39.2 Lbs (17.8 Kg)

Tube Complement
Preamplifier four 6N30P-DR / 6H30П-ДР (original), first (single) amplification stage.
Power supply two 6X4, rectifier tubes.
The LL1 Signature features a topology that brings out the most natural sound performance in the audio path. In principle, it is a single-stage unit that basically represents the shortest possible signal path.

The preamplifier contains four very linear low impedance triodes paralleled into a single inverting gain stage.

The LL1 Signature employs a pure single-ended class-A operation, with no overall feedback applied. Also featured are specially selected high-transconductance dual triodes 6N30P-DR/ 6Н30П-ДР (original) in the signal path and TKD stepped potentiometers for volume control - the best available on today's market.

The preamplifier's audibly neutral power supply features a full-wave vacuum rectifier. This rectifier, together with a choke-containing filter, allows to practically get rid of the hum and buzz and, in the end, ensures the verity of dynamic range without coloration. Two solid-state analog voltage regulators supply dc voltage to the tube filaments (heaters).

Other features include 3 inputs, one tape/HT processor loop, attenuator (-12 dB) switch, output 1/output 2 switches, protection circuitry designed to enable manual muting of the output signal, and built-in remote on/off for LAMM power amplifiers.

The main distinction of the LL1 Signature from any other comparable type of preamplifiers is its practically inaudible sonic signature. When connected to an appropriate type of power amplifier, especially LAMM power amplifiers, it assures the extraordinary transparency of perceived sound and recreation of a three-dimensional soundstage in the home, recording studio, etc., without boundaries and limitations.

Each preamplifier is handcrafted of the finest materials and top quality parts like military-grade DALE metal-film resistors, PRC wire-wound resistors, BOURNS multi-turn potentiometers, CORNELL DUBILIER, and UNITED CHEMI-CON electrolytic capacitors, ELECTROCUBE, ELCON and ROEDERSTEIN film capacitors; HAMMOND chokes, gold-plated NEUTRIK connectors, and military-grade low-noise long-life vacuum tubes.

A custom-designed massive damping panel installed in the preamplifier unit significantly reduces all types of mechanical vibrations which, in turn, leads to a more extended, coherent, and natural bass reproduction.

The LL1 Signature features a custom-designed super-low noise power transformer.

The LL1 Signature works on all world AC line voltages (100/120/220/230/240V).
Read more

- Pure class A, single-stage zero-feedback design, providing the shortest signal path possible.

- Four low internal impedance (about 800 Ohms per triode!) very linear medium-mu duo triodes are connected in parallel, thus minimizing the internal noise of the preamplifier and ensuring the unprecedentedly low output impedance for this type of topology.

- High-current drive capability, in combination with unique single-ended class-A circuitry, assures the preamplifier's capability to drive any cable and any real-world load, while maintaining its practically inaudible sonic signature.

- A specially designed damping panel was installed in the LL1 Signature preamplifier effectively isolates all sensitive electronic components from any induced resonances.

- Absolutely outstanding signal-to-noise ratio makes the LL1 Signature one of the quietest line-stage preamplifiers available on the market.

-
This design is unique to LAMM INDUSTRIES, INC.

- Rated Output Voltage
from 20Hz-20KHz into 41-KOhm load 1 Volt RMS.
- Voltage Gain 7.43 ± 2% or 17.43 ± 0.2dB.
- Attenuation 3.98 ± 2% or 12 ± 0.17dB.
- Absolute Phase Inverting.
- Frequency Response
from 1-50 Volts RMS into 41-KOhm load
(-0.1dB) 20 Hz - 20 KHz.
(-3dB) 5 Hz -140 KHz.
- Slew Rate
Vout=36 Volts peak-to-peak of square-wave signal, F=10KHz; into 41-KOhm load
47 Volts per microsecond.
- Rise Time
Vout=36 Volts peak-to-peak of square-wave signal, F=10KHz; into 41-KOhm load
0.61 microseconds.
- Total Harmonic Distortion from 20 Hz - 20 KHz
Vout=1 Volt RMS into 41-KOhm load
Vout=50 Volts RMS into 41-KOhm load
no more than 0.03%
no more than 1%
Vout=1 Volt RMS into instrument load
Vout=50 Volts RMS in to instrument load
no more than 0.03%
no more than 1%
Vout=1 Volt RMS into IHF load
Vout=30 Volts RMS into IHF load
no more than 0.03%
no more than 1%
- IM Distortion
(60Hz:7KHz 4:1) SMPTE:
Vout = 1 Volt RMS into 41-KOhm load
Vout = 10 Volts RMS into 41-KOhm load
no more than 0.09%.
no more than 1%
Vout = 1 Volt RMS into instrument load
Vout = 10 Volts RMS into instrument load
no more than 0.09%
no more than 1%
Vout = 1 Volt RMS into IHF load
Vout = 10 Volts RMS into IHF load
no more than 0.09%
no more than 1%
- Inputs Unbalanced, gold plated single-ended RCA connectors.
- Input Sensitivity
Vout = 1 Volt RMS into 41-KOhm load
0.135 Volts RMS ± 2%.
- Input Impedance
F=1KHz Typically 16.5 KOhms.
- Outputs
Unbalanced, gold plated single-ended RCA connectors.
Pseudo-balanced, 3-pin gold plated XLR connectors.
Pin assignment:
pin 1 = signal ground;
pin 2 = signal output;
pin 3 = not connected.
- Corrected Output Impedance
F=1KHz typically 200 Ohms.
- Noise
signal-to-noise ratio, below 2 Volts RMS output, unweighted
better than 87 dB.
signal-to-noise ratio, below 2 Volts RMS output, 22Hz - 22KHz
better than 90 dB.
signal-to-noise ratio, below 2 Volts RMS output, A-weighted
better than 97 dB.
- Operating Temperature
-4 to +104 degrees Fahrenheit
(-20 to +40 degrees Celsius) ambient.
- Power Supply
nominal line voltage
100-240 Volts, 50/60Hz.
Input voltage range ±10%.
One power transformer, two vacuum tube rectifiers, four filter chokes, one high voltage (350 vdc) high energy power supply, two solid-state analog non-switching voltage regulators.
AC voltage intensively filtered by special RFI power line filter.
- Front/Rear Preamplifier
Front Panel Controls
- LED control.
- OUTPUT LEVEL control.
- SELECTOR switches.
- MONITOR switches.
- ATTENUATOR (-12dB) switch.
- MUTING switch.
- OUTPUT 1 switch.
- OUTPUT 2 switch.
Rear Panel Connectors and Controls
- Four INPUT CONNECTORS RCA for line inputs and TAPE (play).
- One OUTPUT CONNECTOR RCA for TAPE (record).
- Three OUTPUT CONNECTORS RCA (single-ended outputs).
- Three gold-plated XLR CONNECTORS (pseudo-balanced outputs).
- One XLR CONNECTOR (6 pins, gold-plated) for connecting the power supply cable.
Front/Rear 1Preamplifier Power Supply
Front Panel Controls
- POWER switch.
- OUTLETS switch.
- REMOTE 1 turn-on/off switch for LAMM power amplifiers.
- REMOTE 2 turn-on/off switch for LAMM power amplifiers.
- Four LED controls.
Rear Panel Connectors and Controls
- IEC 320 POWER INLET (3 lug).
- Two AC OUTLETS, switched.
- One XLR CONNECTOR (6 pins, gold-plated) for connecting the power supply cable.
- Two REMOTE CONTROL plugs.
- EARTHING POST (gold plated).
- AC voltage selector 100/120/220/230/240 Volts, internally switchable.
- Remote Control A special built-in circuit enables the remote turn on/off of LAMM power amplifiers. Available remote link cable coordinates the remote functions of two or more amplifiers.
- Safety Unique electronic protection circuit enables muting of the outputs until the preamplifier is stabilized after a turn-on, as well as the functioning of the preamplifier in a "muting" mode during operation, and automatic switching to muting in case the AC line drops or is interrupted.
Plate voltage overload protection:
0.3 Amps slo-blo fuse, internally mounted.
- AC voltage fuses:
2 Amps slo-blo for 100/120 Volts,
1 Amp slo-blo for 220/230/240 Volts,
internally mounted.

General

Power Consumption Typically 96 Watts.
Burn-in Time at Factory Minimum 72 hours.
Recommended Burn-in Time in End-user's System Minimum 80 hours.
Warm-up time Minimum 25 minutes.

Unit dimensions (identical for preamplifier and power supply):
4.5 inches high x 19 inches wide x 13.875 deep + 1.375 inches for front handles.
Crate dimensions: 23" x 19" x 10" (58.42cm x 48.26cm x 25.4cm)

Unit weight
preamplifier 35.8 Lbs (16.2 Kg)
power supply 21.2 Lbs (9.6 Kg)

Shipping weight
preamplifier 53.8 Lbs (24.4 Kg)
power supply 39.2 Lbs (17.8 Kg)

Tube Complement
Preamplifier four 6N30P-DR / 6H30П-ДР (original), first (single) amplification stage.
Power supply two 6X4, rectifier tubes.

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