Audio Preamplifier Vacuum Tube

The LM-512CA is Line Magnetic’s flagship preamplifier. This preamplifier uses two 6KZ8 tubes for voltage amplification, two 6922 tubes for the driver stage and American RCA 22DE4 tubes for high voltage rectification. A large volume potentiometer sits in the center of the front panel allowing independent adjustment of each of the two channels. It has a balanced XLR, 3 RCA inputs and also RCA and XLR outputs. The Balance phase selection allows to choose the selection between American phase and British phase input Mode.

The use of high quality components (Multicap, BC Axial, Philips, Panasonic Relay) wired in the air for the most part is the guarantee of exemplary reliability. Its transformers output are of EI type, specially designed for power supply. A selector on the rear of the preamplifier allows the user to select the phase of the XLR input, allowing connection of almost any source. Nothing but top grade components are used in the LM-512CA preamplifier, such as American RTX Multicap capacitors, Danish Jensen capacitors, German Mundorf MCap capacitors, NCC capacitors, Nichicon capacitors, Kiwame capacitors, a Motorola high current rectifier bridge and Panasonic relays.

Highlights
– Point-to-point wiring
– High quality components

TUBES
2x 6KZ8 (Mullard)
2x 6922 (Genalex)
2x 22DE4 (American RCA)

Hand-made construction with the finest point-to-point wiring
Bias control is accessible on top of the amplifier panel with true ampere meter.
SoftStart and time-relay circuit (30 seconds)
High quality components: Multicap, BC Axial, Philips, Panasonic Relay
HOT selector

Specifications
THD: 0,5% (1KHz)
Signal/Noise ratio: 90dB
Frenquency response: 15 à 30 KHz (-3dB)
Frequency response RCA: 17 à 10 KHz (-3dB)
Sensitivity line input RCA: 150mV
Input Impedance: 600kΩ

Connectors
3x Line inputs RCA (pair)
1x Input XLR (pair)
1x Output RCA (pair)
1x Output XLR (pair)

Tubes Basics Common Replacements
6KZ8 N.C.
6922 ECC88, E88CC, 5814, CV2492
22DE4 N.C.

Generality
Dimensions (L x H x P): 430 x 196 x 383 mm
Weight: 20 Kg