LAMM LP1

0% – 3 Year Financing Available!

LAMM LP1 Signature Tube Phono Preamplifier

The experience of listening to the LP1 is a unique one.  It is, at once, intimate and expansive—as if being transported to a space that belongs to just the listener and the music as they merge with one another. With no electrical artifice to impede communication, a greater understanding of the music is immediately possible. Thus enabled, the listener can enjoy each and every musical element locked in the LP’s grooves with newfound depth, profundity and insight.

Product Description

0% – 3 Year Financing Available!

LAMM LP1 Signature Tube Phono Preamplifier

The dual monaural phono preamplifier model LP1 Signature
is the ultimate statement of perfection in High End audio.
Just like the ML3 Signature and LL1 Signature, the LP1 Signature is one of the best creations of its designer’s professional career.

The LP1 Signature has been designed to complement the ML3 amplifier and the LL1 preamplifier.  It completes the SignatureSeries triad and, in combination with the other two Signature components, represents a “match made in heaven”.  However, the LP1 Signature will perform its magic in any system provided it is of sufficient quality.

The experience of listening to the LP1 is a unique one.  It is, at once, intimate and expansive—as if being transported to a space that belongs to just the listener and the music as they merge with one another. With no electrical artifice to impede communication, a greater understanding of the music is immediately possible. Thus enabled, the listener can enjoy each and every musical element locked in the LP’s grooves with newfound depth, profundity and insight.

The LP1 Signature features a topology that brings out the most natural sound performance in the audio path.  The main distinction of the LP1 Signature from any other comparable type of preamplifiers is its almost inaudible sonic signature.  When connected to the appropriate type of electronics, and especially LAMM amplifiers and preamplifiers, 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.
The LP1 Signature is a vacuum tube preamplifier that employs a high current pure class A operation from input to output.  No loop feedback is employed.  Other features include:

  • Audibly neutral power supplies (one for each channel) featuring full-wave vacuum rectifiers, choke contained filters, vacuum tube high-voltage regulators, and solid-state low-voltage analogue non-switching regulators used as the heater supplies
  • Three separate inputs for MM and MC (two inputs) cartridges
  • All amplification stages utilize high transconductance super low noise high-current vacuum triodes
  • Very accurate RIAA EQ network

Each preamplifier is carefully handcrafted of the finest materials and hand selected top quality parts like military-grade DALE metal-film resistors, RCD wire-wound resistors, BOURNS multi-turn potentiometers; ELECTROCUBE, CORNELL DUBILIER and ROEDERSTEIN film capacitors; high frequency switching grade CORNELL DUBILIER electrolytic capacitors; HAMMOND chokes; gold-plated NEUTRIC 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 LP1 Signature features a custom-designed super-low noise power transformer. 

 

SPECIFICATIONS

Rated Output Voltage*
F = 1KHz:
.
MC1 input to output
MC2 input to output
MM input to output
0.135 Volts RMS.
0.135 Volts RMS.
0.135 Volts RMS.
Voltage Gain*
F = 1KHz:
.
MC1 input to output
MC2 input to output
MM input to output
3,560 2% or 71 + 0.2dB.
970 2% or 59.7 + 0.2dB.
100 2% or 40 + 0.2dB.
RIAA Accuracy*
from 20 Hz – 20 KHz:better than + 0.05 dB/-0.3 dB, typically.
Phono Overload
Input voltage @
F = 1KHz for 1% THD+N:
Phono MC1
Phono MC2
Phono MM
.
.
.
14 millivolts RMS, typically.
45 millivolts RMA, typically.
425 millivolts RMS, typically.
Total Harmonic Distortion
from 20 Hz – 20 KHz;
RIAA de-emphasis
Vout=0.135 Volts RMS:MC1 input to output
MC2 input to output
MM input to outputVout=20 Volts RMS:MC1 input to output
MC2 input to output
MM input to output
.
.
no more than 0.1%.
no more than 0.07%.
no more than 0.04%..
no more than 1%.
no more than 1%.
no more than 1%.
Inputs
Unbalanced:gold plated single-ended RCA connectors.
Input Sensitivity*

Vout=0.135 Volts RMS, F = 1KHz:MC1 input
MC2 inputt
MM input
.
.
0.038 millivolts RMS + 2%.
0.14 millivolts RMS + 2%.
1.35 millivolts RMS + 2%.
Input Impedance
F = 1 KHz:MC1 input
MC2 inputt
MM input (standard factory adjustment)MM impedance load settings:MM capacitance settings:
.
31.5 Ohms, typically.
430 Ohms, typically.
47 KOhms shunted by 200 pF.100 Ohms, 10 KOhms, 47 KOhms, 75 KOhms, 100 KOhms100 pF, 150 pF, 200 pF, 300 pF, 400 pF
Outputs
Unbalanced:gold plated single-ended RCA connectors.
Corrected Output Impedance
F = 1 KHz:1.3 KOhms, typically.
Noise*
Signal-to-noise ratio, below 1 Volts RMS output,  A unweighted

MC1 input to output (shorted input):
MC2 input to output (shorted input):
MM input to output (shorted input):

.

.

better than 78dB.
better than 79.5dB.
better than 81.5dB

          Absolute Phase
MC1 input to output
MC2 input to output
MM input to output
non-inverting.
non-inverting.
non-inverting.
Operating Temperature
-4 to +104 degrees Fahrenheit
(-20 to +40 degrees Celsius) ambient.
Power Supply
(Each LP1 contains two identical external power supplies – one for each channel.   Therefore, all further information regarding power supply is shown for ONE power supply, unless otherwise indicated)
.
nominal line voltage:input voltage range:
.
100-240 Volts, 50/60Hz.
.
±10%.Two power transformers; two vacuum tube rectifiers, three filter chokes; one high speed vacuum tube voltage regulator, two solid-state analog non-switching voltage regulators.AC voltage intensively filtered by special RFI power line filter.
            Power Supply Energy Storage
approximately 102 Joules.
Front/Rear Panel Control,
Preamplifier unit
.
Front panel controls:
  • Two LED controls (one for each channel).
  • Two POWER switches (one for each channel).
  • Four SELECTOR switches (two for each channel).
Rear panel connectors and controls:
  • Six INPUT CONNECTORS RCA for PHONO inputs.
  • Two OUTPUT CONNECTORS RCA.
  • PHONO grounding post (one for each channel).
  • EARTHING post (gold-plated)..
  • Two XLR CONNECTORS (7 pins, gold-plated) for connecting the power supply cables.
Front/Rear Panel Control,
Power Supply unit
.
Front panel controls:
  • LED control.
Rear panel connectors and controls:
  • IEC320 power inlet (3 lug).
  • EARTHING post (gold-plated).
  • One XLR CONNECTOR (7 pins, gold-plated) for connecting the power supply cables.
Features
Pure class A vacuum tube design. All stages are single-ended.No loop feedback is employed.  High-current drive capability, in combination with unique single-ended class A circuitry, guarantee the preamplifier to drive any cable and any reasonable real world load, while maintaining its practically inaudible sonic signature.Tremendous reserves of headroom and output drive capability are engineered into the LP1.

Specially designed damping panel installed in the LP1 effectively isolates all sensitive electronic components from any induced resonances.

Absolutely outstanding signal-to-noise ratio makes the LP1 one of the quietest phono preamps available on the market.

This design is unique to LAMM INDUSTRIES, INC.

AC voltage selector100/120/220/230/240 Volts, internally switchable.
SafetyUnique electronic protection circuit enables muting of the outputs until the preamplifier is stabilized after a turn-on, as well as functioning of the preamplifier in a “muting” mode during operation and automatic switching to muting in case the AC line drops or is interrupted.Vacuum tube voltage regulator overload protection:
0.125 Amp 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.
0.125 Amp slo-blo for 100/120/220/230/240 Volts.
General
.
Power consumption:
Typically 170 Watts.
Typically 85 Watts (with one channel turned on).
Burn-in time at factory:Minimum 72 hours.
Recommended burn-in time in end-user’s system:Minimum 160 hours.
Warm-up time:Minimum 30 minutes.
.
Unit dimensions
(identical for preamp and power supply):Crate dimensions::
.
4.5 inches high x 19 inches wide x 13.875 deep + 1.375 inches for front handles.23 inches x 19 inches x 10 inches
(58.42cm x 48.26cm x 25.4cm)
.
Unit weight
preamplifier:
power supply:Shipping weight
preamplifier:
power supply:
.
.
36.8 Lbs (16.7 Kg).
20.7 Lbs (9.4 Kg).54.8 Lbs (24.9 Kg).
38.7 Lbs (17.6 Kg).
.
TUBE COMPLEMENTpreamplifier:power supply:
 

  • V101 – 6C3P / 6C3П (original) (left channel, first amplification stage);
  • V102 – 6C3P / 6C3П (original) (right channel, first amplification stage);
  • V103 – 6C45P-E / 6C45П-E (original)
    (left channel, second amplification stage);
  • V104 – 6C45P-E / 6C45П-E (original)
    (right channel, second amplification stage)
  • V101, V102 – 12AX3/12BE3 rectifier tubes;
  • V103 – 6C19P / 6C19П, voltage regulator tube;
  • V104 -5651A, voltage reference tube;
  • V103 -12AX7/ECC83, voltage regulator tube.

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