LAMM INDUSTRIES, INC.

Transcription

1 LAMM INDUSTRIES, INC. TheLP1Si gnat ur e phono preamplifier

2

3

4 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 solidstate 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

5 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 militarygrade 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.

6 LP1 Signature phono preamplifier SPECIFICATIONS RATED OUTPUT VOLTAGE F = 1 KHz: MC1 input to output MC2 input to output MM input to output Volt RMS Volt RMS Volt RMS VOLTAGE GAIN F = 1 KHz: 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 20Hz-20KHz: better than , -0.3 db PHONO OVERLOAD F = 1 KHz: Phono MC1 Phono MC2 Phono MM 8.0 millivolts RMS 40.0 millivolts RMS millivolts RMS 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 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%

7 INPUTS Single-ended: gold-plated, single-ended RCA connectors. INPUT SENSITIVITY Vout=0.135 Volts RMS, F = 1 KHz: MC1 input MC2 input MM input millivolt RMS + 2%, typically 0.14 millivolt RMS + 2%, typically 1.35 millivolt RMS + 2%, typically INPUT IMPEDANCE F = 1 KHz: MC1 input MC2 input MM input (standard factory adjustment) MM impedance load 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 KOhms 100 pf, 150 pf, 200 pf, 300 pf, 400 pf OUTPUTS Single-ended: gold-plated, single-ended RCA connectors. CORRECTED OUTPUT IMPEDANCE 1.5 KOhms, typically. 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) better than 78 db. better than 79.5 db. better than 81.5 db. 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.

8 POWER SUPPLY* Nominal line voltage: Input voltage range: Volts, 50/60Hz. ± 10%. Two power transformers, two vacuum tube rectifiers, three filter chokes, one high speed vacuum tube voltage regulator, two solidstate analog non-switching voltage regulators. AC voltage intensively filtered by special RFI power line filter. POWER SUPPLY ENERGY STORAGE Approximately 102 Joules. FRONT PANEL CONTROLS Preamplifier: REAR PANEL CONNECTORS AND CONTROLS Preamplifier: 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. FRONT PANEL CONTROLS Power supply: LED control. REAR PANEL CONNECTORS AND CONTROLS Power supply: 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)

9 FEATURES Pure class A vacuum tube design. All stages are singleended. No loop feedback is employed. High-current drive capability, in combination with unique singleended 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. AC voltage selector 100/120/220/230/240 Volts, internally switchable. SAFETY FEATURES 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: 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 Amp slo-blo for100/120/ 220/230/240 Volts, internally mounted. POWER CONSUMPTION Typically 170 Watts. POWER CONSUMPTION Typically 85 Watts (one channel is turned on)

10 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. DIMENSIONS (preamplifier and power supplies have the same dimensions) 4.5"(11.43cm)H x 19"(48.26cm)W x "(35.24cm)D [add 1.375"(3.5cm) of depth for front handles]. WEIGHT, UNIT ONLY Preamplifier Power supply 36.8 Lbs (16.7Kg) Lbs (9.4 Kg), each. SHIPPING WEIGHT Preamplifier Power supply 54.8 Lbs (24.9Kg) Lbs (17.6 Kg), each. TUBE COMPLEMENT Preamplifier 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) Power supply V101, V102 12AX3 rectifier tubes. V103 6C19P (6C19Π), voltage regulator tube. V A, voltage reference tube. V105 12AX7/ECC83, voltage regulator tube.

11 SUBSTITUTION TUBE TYPES Preamplifier 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** Power supply 6C19P (6C19Π): no substitution. Available factory-direct from Lamm only 5651A: AX7/ECC83: 12AX7A, 12AX7WA, 12AX7WA/7025 (SOVTEK), 12AX7WXT (SOVTEK), 12AX7LPS (SOVTEK), E83CC, ECC803, 5751, 6681, 7025, 7729, CV492, CV AX3: 12BE3, 12BT ** 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.

12 2013, Lamm Industries, Inc.

13 Lamm Industries, Inc East 21 Street Brooklyn, New York tel fax