lab12 Integre4 User manual
Table of Contents
It is yours…………………………………………………………………………
Unpacking and Warnings…………………………………………………
Features………………………………………………………..………………….
Installation & Placement………………………………..……………….
Front Panel………………………………………………………..……………..
Rear Panel Connections……………………………………..……………
Remote Control…………………………………………………..……………
Interface menu structure…………………………………..……………
Connections………………………………………………………..……………
For the safety of your equipment………………………..………….
Tubes compatibility / Bias values………………………..………….
Specifications……………………………………………………..……………
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6
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11
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12
13
LAB12 integre4 - Audiophile integrated amplifier
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IT IS YOURS!
Thank you for selecting Lab12 integre4, a new age audiophile amplifier designed to be the core of a
modern high-end audio system.
Do not forget that your amplifier is totally handcrafted with perfectly matched parts of the finest selections.
All components are carefully chosen after hours of listening and testing, while paying great attention to
every detail affecting the outcome. As every Lab12 device, suara has an ultra-solid construction with glass
blasting anodized finishing.
In order to reach the optimal performance, your amplifier needs at least 150 hours of listening. In this time
all components go from “burn in” period to stable.
Before setting up your new integre4, we encourage you to read this manual thoroughly and get familiar
with its features.
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
Unpacking
Lab12 integre4 should be removed from its box with care. Remove all the foam of the box before you
unpack integre4. Safely store the tubes boxes until you secure integre4 at its final place.
Unpack integre4 with your hands on two sides of amplifier.
Integre4 box contains:
•Integre4 amplifier
•4 numbered power tubes
•4 numbered 6N1P driver tubes
•Remote control
•Bias screwdriver
•Owner’s manual
LAB12 integre4 - Audiophile integrated amplifier
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Warnings
No user serviceable parts are included inside. Do not unscrew the cover; high voltages remain after
disconnecting from mains. In case your device requires any kind of service or upgrade, please ship or
take your equipment directly to Lab12 or to one of our authorized dealers or other qualified personnel.
Always use same type of fuse for replacement.
Features
•EL34, 6550, KT88, KT120 compatible
(KT150 from factory)
•Remote Control
•Large OLED display
•Blue Velvet ALPS motorized potentiometer
•Sophisticated protection and bias monitoring system
•No feedback design
•SRSG® implementation
•5mm Aluminum face panel
•Five Years Guarantee
LAB12 integre4 - Audiophile integrated amplifier
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Installation & Placement
Lab12 integre4 should be placed on a solid flat surface. You should avoid placing it near a heat source as
this could compromise the amplifier’s performance and reliability. You should never place another
componentdirectly on top of this amplifier. Make sure that youramplifierhas anadequate flowof air around
it. Amplifier could be hot in some points; this is normal and within parts specifications.
Take care of the glass blasting anodized finish of front panel with a soft cloth. No need to use any sprays
or polishes. Never use cleaners containing abrasives, as this will damage the surface.
Insert the tubes carefully in each position. All tubesare marked with position number that was placed during
calibration and burn in of integre4.
Integre4 Tubes Positions
All in box tubes are perfectly matched during calibration to achieve a perfect balanced operation.
V1 : KT150 V5 : 6N1P
V2 : KT150 V6 : 6N1P
V3 : KT150 V7 : 6N1P
V4 : KT150 V8 : 6N1P
LAB12 integre4 - Audiophile integrated amplifier
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Front Panel
Integre4
Front pane
l
In the front panel you will see an OLED display with bias setting trimmers, the navigation rotary knob and
the volume control.
With the left rotary/push knob (A) you can navigate into menu structure.
The OLED display (B) is located in the middle of front panel. Here you can see all the interface menu
details. On the bottom of the OLED display you will find the 4 trimmers for the bias adjustment (C).
The right motorized rotary control (D) adjusts the output volume of amplifier.
LAB12 integre4 - Audiophile integrated amplifier
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Rear Panel Connections
Integre4 Rear
panel
In the rear panel you will find the input and output connections.
On the left side ofthe rear panel, you will find five pairsof single-ended RCA analog audio input connectors
(A).
On the right side of the rear panel, you will find two pair of speakers outputs (B).
To the right side you will find an IEC AC input (C) including a main fuse holder (D).
LAB12 integre4 - Audiophile integrated amplifier
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Remote Control
Integre4
Remote Control
You can fully control your amplifier from IR remote control RC1.
At the top section of the remote control the two buttons for output volume adjustment (A) are located.
Bellow volume buttons you will find two buttons for input selection and menu navigation (B).
Output muting and menu buttons are on the bottom line (C).
LAB12 integre4 - Audiophile integrated amplifier
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Interface menu structure
Integre4 is a new era tube integrated amplifier; a powerful processor is responsible for the full and safe
control of the device. All details can be monitored through the OLED display.
When you turn on your amplifier, the soft start circuit provides about a minute to warm up the tubes.
After warming up time, the amplifier is ready and the menu selections display appear on the OLED display.
Menu item
Description
Available Actions
1
Input selection
It allows you to choose the desired
input.
Turn the navigation rotary control knob to
select the desired input.
3
Valves hours
It informs you about the Total
working hours of valves.
Push and hold rotary knob to reset this
counter. We suggest resetting only after
valves’changing.
4
Valves bias
It allows you to adjust the correct
bias current for each of the power
valves.
Turn the rotary knob to inspect the current
bias for each power valve. Adjust if
needed from corresponding trimmer at the
bottom of OLED display. See paragraph
Tubes compatibility / bias values for
more details. Push again to go back to the
main menu navigation.
5
Input options
You can choose the displayed
name for any analog input
between the given choices or
disable this.
Turn the rotary knob to see the available
choices for each input. Push again to go
back to the main menu navigation.
LAB12 integre4 - Audiophile integrated amplifier
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Connections
Main connections
Connect a High-Grade Powercable to the IEC input and to your wall socket. Make sure that your wallsocket
provides a good ground before connecting the power cable. You can supply 230 to 240 Volts AC (50Hz).
(Every integre4 is tuned and calibrated using the Lab12 Knack mk2 Power Cable. We strongly suggest
using this cable).
Connect an analog source
Connect any line level analog source to any of the five input pairs. We suggest using high quality, shielded
interconnect cables.
Connect your Speakers
Connect your speakers to the additional output of integre4. Make sure about the phase and polarity of
speakers, always connect ’plus’ (red) bind of integre4 to ’plus’ (red) bind of speaker and respectively the
black one. You can connect any speakers with impedance from 4 to 16 ohm.
For the safety of your equipment
! Make sure that all your equipment is turned off before any
connection.
! Never turn on integre4 without connected speakers on it. It is
possible to damage tubes or even output transformers.
! After turning off your amplifier wait at least 10 minutes before
turning it back ON.
LAB12 integre4 - Audiophile integrated amplifier
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Tubes compatibility / Bias values
Bellow you will find a bias chart for the most common compatible tubes for integre4.
!After changing tubes always turn all the bias trimmers’ counterclockwise (cold bias) with bias
screwdriver, before turning on the amplifier. Wrong bias will destroy your tubes and possibly
your amplifier. Always adjust between following values for each type of tubes immediately after
turning on. Repeat bias procedure at least 3 times the first 5 hours of using.
Tube type
Lower bias limit
Higher bias limit
6L6
11mA
14mA
EL-34
13mA
18mA
6550
23mA
29mA
KT-88
27mA
28mA
KT-120
32mA
39mA
KT-150
38mA
45mA
If you are unsure about correct biasing, please contact lab12 or advise an authorized dealer.
LAB12 integre4 - Audiophile integrated amplifier
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Specifications
•Power: 230VAC 50Hz (115VAC 60Hz)
•Power consumption: 350 VA max
•Output power: 65 Watt per channel (KT150)
•Frequency response: 15 Hz - 60 KHz (-1dB)
•Input impedance: 50K ohm
•Recommended speakers: 4-8 ohm
•Tubes complement: 4x 6n1p dual triodes, 4x KT150 power pentodes
•Inputs: 5x line stereo RCA connectors
•Available Colours: Matt Black, Frozen Silver
•Dimensions (WxHxD): 43x19x29 cm
•Weight: 20Kg
Warranty
This device has 5 years warranty for all parts (or 90-Day Limited Warranty for vacuum tubes) from the
day of purchase.
We wish you to enjoy your new device exactly as we enjoyed it when we built it for you!
Notes:
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