lab12 PRE1 User manual

Owner’s Manual
PRE1
Triode Class A Line Preamplifier
www.lab12.gr
v1.1

LAB12 PRE1 Triode Class A Line Preamplifier
Table of Contents
It is yours
Features
Installation & Placement
Front Panel
Rear Panel
Remote Control
Main connections
For the safety of your equipment
Specifications

LAB12 PRE1 Triode Class A Line Preamplifier
IT IS YOURS!
Thank you for selecting the Lab12 Pre1, a high grade audiophile Line Preamplifier. Pre1 Preamplifier born after
two years of development. It is the first preamplifier in Lab12 products range and aims to exactly the same target
as all our products, to achieve a warm, musical and most of all realistic sound that remains enjoyable even after
many hours of listening.
PRE1 offers five analog inputs and two preamplifier outputs, so you can easily drive a bi-amping system or a
power amplifier and active subwoofer(s) without problem. All components are carefully chosen after hours of
listening and testing, while paying great attention to every detail affecting the final outcome. As every lab12
device, Pre1 has an ultra-solid construction with handcrafted finishing and luxury metal paint.
Internally we use a matched pair of E88cc tubes in a special configuration and a four stages solid state power
supply with more than enough capacity and smart filtering. Dual mono philosophy and fine symmetry® exists in
every stage of circuit and PCB and of course we use the SRSG® topology in this gear too. Special selected parts like
MKP audio grade capacitors and 1% resistors bring the fine detailed sound and the wider resolution.
Do not forget that your Pre1 is totally handcrafted with perfectly matched parts of the finest selections. You have
to know that to reach the optimal performance your PRE1 need at least 200 hours of listening. In this time all
components go from “burn in” period to stable.
Before setting up your new PRE1, we encourage you to read this manual to properly acquaint yourself with its
features. We love music and audio devices; we build your new device with emotion and personal treatment.
The information contained in this manual is subject to change without notice. The most current version of this
manual is available on our official website at http://www.lab12.gr

LAB12 PRE1 Triode Class A Line Preamplifier
Features
•Handcrafted audio grade transformers
•IR remote control
•Toroidal power transformer
•Special Audio Grade parts in every stage
•No feedback design
•SRSG® implementation
•fine symmetry® implementation
•Gold plated Teflon rca connectors
•Gold plated tube sockets
•5mm Aluminum face panel with luxury painting
•Five Years Warranty
Installation & Placement
The LAB12 PRE1 should be placed on a solid flat surface. You should avoid placing it near a heat source as this
could compromise the preamplifier performance and reliability. You should never place another component
directly on top of PRE1.
Prepare the remote control inserting the included batteries. Beware of polarity.
Take care of the finest luxury finish of front panel with a soft cloth.

LAB12 PRE1 Triode Class A Line Preamplifier
Front Panel
PRE1 Front pane l
At front panel you will see eight indication LEDs, one input selector, the volume control and the ir
receiver.
The center LED (C) indicates that the device is powered on.
The LEDs (D) indicates that the outputs of PRE1 are active. LEDs (D) blinking for a 1 minute (tubes
warm up time) after turning on the PRE1, make sure that the volume control is in a low level within
this minute.
To the left of 3 LEDs you see the input indicators (A) and rotary input selector (B). You can select
your desired input of total five.
Finally to the right of 3 LEDs you see the Volume control (E). You can adjust the Volume of the
Preamplifier outputs.
Make sure that no objects are placed in front of ir receiver (F)

LAB12 PRE1 Triode Class A Line Preamplifier
Rear Panel
PRE1 Rear panel
On the rear panel you will find the connection sockets for inputs and outputs.
On the left side there are the two pairs of preamp outputs (A).
On the right of the preamp outputs you will find the line inputs named 1 to 5 (B).
To the right side you will find an IEC AC input (C). Below IEC input is located the main fuse holder (D)
and the Power switch (F).

LAB12 PRE1 Triode Class A Line Preamplifier
Remote Control
PRE1 Remote Control Panel
You can fully control your preamplifier from IR remote control RC1.
To the top of the remote control located the two buttons for output volume adjustment (A).
Bellow volume buttons you will find two buttons for input selection (B).
You can instantly mute the preamplifier output with lower left mute button (C).

LAB12 PRE1 Triode Class A Line Preamplifier
Main connections
Connect a High Grade Power cable to the IEC input and to your wall socket. Make sure that your
wall socket provides a good ground before connecting the power cable.You can supply 230 to
240 Volts AC (50Hz). (Every PRE1 is tuned and calibrated using the LAB12 Knack Power
Cable)
Connect to your Power Amplifier
Connect the preamplifier analog output to an analog line level input to your Power Amplifier. Make
sure about the correct channel connections. We suggest to use a good quality interconnect cable
pair.
Connect an analog output Source
Make sure that your Source has an analog line level output. Connect an analog interconnect cable
from the source output to one of analog inputs of PRE1. Select input number with the selector
switch on the left side of the front panel on your PRE1.
Note
For the safety of your equipment
! Make sure that all of your equipment is turned off before any connection.
! To avoid damaging you speakers you have to turn on the PRE1
some seconds before turning on your power amplifier and turn it off
some seconds after turning off your power amplifier.

LAB12 PRE1 Triode Class A Line Preamplifier
Specifications
•Power: 230/240 Vac 50Hz (1Α fused)
•Power consumption: 80 VA max
•Frequency response: +0-3dB, 5Hz to 100kHz
•Distortion: 0.04% at 2V RMS output
•Gain: 21dB
•Signal to Noise ratio: 90dB
•Maximum output: 14V RMS
•Input impedance: 50K ohms
•Output impedance: 900 ohm
•Tube complement: 2x E88CC dual triode
•Warm up time: 1 minute
•Inputs: 5x line stereo (RCA connectors)
•Preamp outputs: 2xline stereo (RCA connectors)
•Available colors: Etna Black, Pearl White, Custom color
•Dimensions (WxHxD): 43x11x29 cm
•Weight: 5 Kg
Warranty
This device has 5 years warranty from the day of purchase for all parts excluding valve tubes.