The LP1 Signaturephono preamplifier

LAMM INDUSTRIES, INC.

LAMM INDUSTRIES, INC.

LP1 Signature dual monaural

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 Signature Series 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.

The LP1 Signature works on all world AC line voltages (100/120/220/230/240V), and can be adjusted internally without elaborate modifications.

LP1 Signature phono preamplifier

SPECIFICATIONS

• RATED OUTPUT VOLTAGE F = 1 KHz: MC1 input to output MC2 input to output

MM input to output

• VOLTAGE GAIN F = 1 KHz: MC1 input to output

MC2 input to output MM input to output

• RIAA ACCURACY from 20Hz-20KHz: • PHONO OVERLOAD F = 1 KHz: Phono MC1

Phono MC2 Phono MM

• TOTAL HARMONIC DISTORTION from 20Hz-20KHz; RIAA de-emphasis: Vout=0.135 Volts RMS MC1 input to output

MC2 input to output MM input to output

Vout= 20 Volts RMS MC1 input to output

MC2 input to output MM input to output

0.135 Volt RMS 0.135 Volt RMS 0.135 Volt RMS

3,560 ± 2% or 71 ± 0.2dB 970 ± 2% or 59.7 ± 0.2dB 100 ± 2% or 40 ± 0.2dB

better than + 0.06, -0.3 dB 8.0 millivolts RMS 40.0 millivolts RMS

400.0 millivolts RMS 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

Single-ended: • INPUT SENSITIVITY Vout=0.135 Volts RMS, F = 1 KHz: MC1 input

MC2 input MM input

• INPUT IMPEDANCE F = 1 KHz: MC1 input MC2 input

MM input (standard factory adjustment) MM impedance load MM capacitance settings

• OUTPUTS Single-ended: • CORRECTED OUTPUT IMPEDANCE • NOISE signal-to-noise ratio, below 1 Volt RMS

output, A weighted: MC1 input to output (shorted input)

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

• ABSOLUTE PHASE MC1 input to output MC2 input to output

MM input to output

• OPERATING TEMPERATURE

gold-plated, single-ended RCA connectors.

0.038 millivolt RMS + 2%, typically 0.14 millivolt RMS + 2%, typically

1.35 millivolt RMS + 2%, typically

31.5 Ohms, typically 430 Ohms, typically

47 KOhms shunted by 200 pF 100 Ohms, 10 KOhms, 47 KOhms, 75 KOhms, 100 KOhms 100 pF, 150 pF, 200 pF, 300 pF, 400 pF gold-plated, single-ended RCA connectors. 1.5 KOhms, typically.

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

Non-inverting Non-inverting Non-inverting

-4 to +104 degrees Fahrenheit

(-20 to +40 degrees Celsius) ambient.

• POWER SUPPLY* Nominal line voltage: Input voltage range:

• POWER SUPPLY ENERGY STORAGE • FRONT PANEL CONTROLS

Preamplifier: • REAR PANEL CONNECTORS AND

CONTROLS Preamplifier:

• FRONT PANEL CONTROLS

Power supply: • REAR PANEL CONNECTORS AND

CONTROLS Power supply:

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. Approximately 102 Joules. Two LED controls (one for each channel). Two POWER switches (one for each channel). Four SELECTOR switches (two for each channel). Six INPUT CONNECTORS RCA for PHONO inputs. Two OUTPUT CONNECTORS RCA. PHONO grounding posts (one for each channel). EARTHING post (gold-plated). Two XLR CONNECTORS (7 pins, gold-plated) for connecting the power supply cables. LED control. IEC320 power inlet (3 lug). EARTHING post (gold-plated). One XLR CONNECTOR (7 pins, gold-plated) for connecting the power supply cable.

----------------------- * 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)

• FEATURES AC voltage selector • SAFETY FEATURES • POWER CONSUMPTION • POWER CONSUMPTION

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 LP2 one of the quietest phono preamps available on the market. This design is unique to Lamm Industries, Inc.

100/120/220/230/240 Volts, internally switchable. Unique 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, internally mounted. 0.125 Amp slo-blo for100/120/ 220/230/240 Volts, internally mounted. Typically 170 Watts. Typically 85 Watts (one channel is turned on)

• BURN-IN TIME AT FACTORY • RECOMMENDED BURN-IN TIME IN

END-USER’S SYSTEM • WARM-UP TIME • DIMENSIONS

(preamplifier and power supplies have the same dimensions)

• WEIGHT, UNIT ONLY

Preamplifier Power supply

• SHIPPING WEIGHT

Preamplifier Power supply

• TUBE COMPLEMENT

Preamplifier

Power supply

Minimum 72 hours. Minimum 160 hours. Minimum 30 minutes. 4.5"(11.43cm)H x 19"(48.26cm)W x 13.875"(35.24cm)D [add 1.375"(3.5cm) of depth for front handles]. 36.8 Lbs (16.7Kg). 20.7 Lbs (9.4 Kg), each. 54.8 Lbs (24.9Kg). 38.7 Lbs (17.6 Kg), each. V101 – 6C3P (6C3Π)

(left channel, first amplification stage) V102 – 6C3P (6C3Π)

(right channel, first amplification stage) V103 – 6C45P-E (6C45Π-E)

(left channel, second amplification stage) V104 – 6C45P-E (6C45Π-E)

(right channel, second amplification stage) V101, V102 – 12AX3 rectifier tubes. V103 – 6C19P (6C19Π), voltage regulator tube. V104 – 5651A, voltage reference tube. V105 – 12AX7/ECC83, voltage regulator tube.

• SUBSTITUTION TUBE TYPES Preamplifier Power supply

6C3P (6C3Π): 6C3P-EB (6C3Π−ΕΒ),

6C3P-DR (6C3Π− ДP) We highly recommend purchasing matched tubes factory-direct from Lamm only **

6C45P-E (6C45Π-E): no substitution.

Matched tubes available factory-direct from Lamm only**

6C19P (6C19Π): no substitution.

Available factory-direct from Lamm only

5651A: 5651 12AX7/ECC83: 12AX7A, 12AX7WA, 12AX7WA/7025

(SOVTEK), 12AX7WXT (SOVTEK), 12AX7LPS (SOVTEK), E83CC, ECC803, 5751, 6681, 7025, 7729, CV492, CV8156.

12AX3: 12BE3, 12BT3.

----------------------- ** Our in-house designed and built tube testers allow us to measure three or (if necessary) even four different parameters of each tube (in contrast to commercial tube testers that measure only one parameter). Based on gathered data we test and match the tubes with unsurpassed precision that has simply not been available before. Note 1: All the measurements were taken with the 41 KOhm load connected to the preamplifier's output. Note 2: All the measurements were taken with A weighted filter.

© 2013, Lamm Industries, Inc.

Lamm Industries, Inc. 2513 East 21 Street

Brooklyn, New York 11235 +1.718.368.0181 tel. +1.718.368.0140 fax

lamm.industries@verizon.net www.lammindustries.com