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PRE 81 by Labo ★ K Effects

Replica of the NEVE 8108 console preamplifier in API 500 format (compatible with 51X format)

The warmth of this famous preamp available in 500 format.

. The compatibility with the x51 format allows the preamp to operate with -/+18V tensions as on the console thanks to the regulators on the board.

USER CONTROLS

LINE : Selects the Microphone or Line input

48 : Enables 48V power supply for condenser microphones (LED display)

PH: Reverse the phase of the signal

TRIM:  Reduces or increases the gain by +/- 10dB

MIC GAIN: selects the gain of the microphone preamplifier (20dB to 80dB)

FILTRES : Low-cut and high-cut filters with potentiometer scanning.

LEVEL:  Output volume (Fader)

INSTRUMENT:  High impedance input for instrument. Inserting a Jack plug switches the instrument input to the microphone input of the preamp via a relay.

EQ 81 by Labo ★ K Effects

Replica of the equalizer of NEVE 8108 consoles in API 500 format (compatible with 51X format)

The warmth of this legendary equalizer available in 500 format.

The input and output are balanced at the line level. The compatibility with the 51X format allows the equalizer to operate with -/+18V tensions as on the console thanks to the regulators on the board.

USER CONTROLS

Frequency controls: one per band, marked 30Hz - 300Hz; 200Hz - 2kHz ;
0.8 kHz -8 kHz ; 1.5 kHz - 15 kHz. Set band centre frequencies.

Boost/Cut controls: one per band, marked LOW, MID 1, MID 2, HIGH. Set band boost or cut over range +l8dB.

Low shape Button: When out, low band response is bell shaped. When in,lowband response is shelving.

Hi shape Button: when out, high band response is bell shaped. When in,high band response is shelving.

IN Button: when out , EQ is bypassed. When in, EQ is inserted in the signal path.

CH button: Allows the equalizer to be inserted into the audio path of a PRE81 preamplifier

In the 500, 51X format, the modules must be connected with the cable supplied.

With the Labo K Effects K551X format rack this function is possible with the addition of a K551X 02-02 backplane.

EQ 51 by Labo ★ K Effects

Replica of the equalizer of NEVE 51 consoles in API 500 format (compatible with 51X format)

The punch of this legendary equalizer available in 500 format.

The input and output are balanced at the line level.

USER CONTROLS

Frequency controls: one per band, marked 31.5Hz - 315Hz; 200Hz - 2kHz ;
0.8 kHz -8 kHz ; 1.6 kHz - 16 kHz. Set band centre frequencies.

Boost/Cut controls: one per band, marked LOW, MID 1, MID 2, HIGH. Set band boost or cut over range +l7dB.

Low shape Button: When out, low band response is bell shaped. When in,lowband response is shelving.

Hi shape Button: when out, high band response is bell shaped. When in,high band response is shelving.

IN Button: when out , EQ is bypassed. When in, EQ is inserted in the signal path.

CH button: Allows the equalizer to be inserted into the audio path of a PRE81 preamplifier

In the 500, 51X format, the modules must be connected with the cable supplied.

With the Labo K Effects K551X format rack this function is possible with the addition of a K551X 02-02 backplane.

V-DYN by Labo ★ K Effects

Replica of the Dynamics section gate expander and limiter compressor of Neve V channelstrip available in 500 format

A channel can be composed of several modules

Preamp PRE81+EQ81+V-Dyn or PRE81+EQ51+V-Dyn

The gate /Expander controls are:

Key

Pressing this Button provides a dedicated patch input to the gate only; enabling the gate to be
triggered by an external signal.
The compressor operation is not affected.


INV

This button inverts the external trigger control so that the gate closes when a signal of
the required level is present. This can be used as a « Ducker » or for mutein severe breakthrough frm another source.

HYST

Hysteresis is the difference in dB between the gate mute level (set by the threshold control) and its unmute level.
Varying hysteresis allows more precise triggering of the wanted signal whilst still allowing the correct amount of signal
tail through. (10dB of hysteresis is usually a good starting value for setting the gate). The fully anti-clockwise position
switches the circuit into a 2:1 ration expander.


THR

Provides threshold control over 70dB in two overlapping ranges.

The -30 button adds -30dB to the panel values.

RGE

Sets the range (mute depth) of the gate over a 50dB range.

FAST

Changes the attack time for the circuit from 1ms to 100us.

REL

The release time for the gate/expander is continuously variable from 30ms to 3s

GATE

switches the gate/expander into circuit separatively from the limiter/compressor.

The limiter /compressor controls are:

L/C

switches the limiter compressor into circuit separatively from the gate/expander.

LINK

When Link button is pressed it links the control voltage of the limiter/compresor to another module for stereo or quad ganging. The control voltage is still generated if the limiter compressor is not in circuit and can therefore be used for stereo/quad link
even if it is not actively processing.

GAIN

Gain makeup of up 30dB is provided to enable an excellent signal to noise ration to be maintened throughout
the path even under heavy compression.

THR

Threshold level can be controlled over 50dB in two overlapping ranges

The -20 button adds -20dB to the panel values.

RAT

Controls the compression ratio with a conveniently arranged law betweeen 1:1 and limiting.

Fast

Nominally changes the impulse attack time from 1ms to 100us. However the attack time is programme dependent, normally having a 7ms time constant, with faster time constants being applied to transient programme.

REL

The release time can be varied from 30ms to 3s with the additional benefit of automatic hold and impulse release circuits to remove pumping
and breething effects.

AUTO

Switches the release control to a triple time constant program dependent release time.


Gain reduction Led

A simple metering fonction is performed by the tri color Led .
The led indicate Green for a small gain reduction, orange for medium and red for large (1, 5 and 10dB respectively).

No Amp by Labo ★ K Effects

Replica of the Sansamp Classic pedal in API 500 format (compatible with 51X format)

Inspired by the famous Sans Amp Classic

Guitar and bass pedal of the 80's converted to the 500 format

Also allows you to reamp a track into the No Amp when no instrument is plugged into the jack.

FX Insert by Labo ★ K Effects

FX Pedal Insertion Version 500 (compatible with format 51X)

This module allows the use of guitar effect pedals via the inserts of analogue mixers or soundcard interfaces.
This allows effects to be added to recorded tracks.

This module has a +4dB line input which provides a high impedance output with gain control to drive an effects pedal input via a jack connector.
A high impedance jack input allows the pedal output to be picked up and then via a volume control, to drive a balanced +4dB output stage.

This output feeds the insert return of the mixer or interface.
All guitar effects (wha-wha, disto, delay etc...) can be used.
The high impedance outputs can also be used to directly drive an amp for reamping. The high impedance inputs can also be used as a direct box to record the instrument directly to a track.

The icing on the cake is a 9V power supply output via a standard connector on the front panel. This power supply has a voltage control with LED voltmeter. The voltage range goes from 5V to 12V, which allows you to get particular sounds on certain pedals, especially distortions or fuzz (battery wear simulation).

K551X format by Labo ★ K Effects

The 500 format created by API allows the use of different preamplifiers, compressors... in the same box that provides the supply voltages and inputs/outputs. (API is a registered trademark of Automated Processes Incorporated)

The size of the modules is standardized and each module is equipped with a board edge connector that plugs into a female connector on the backplane. 

The 15 pins of the connector provide the standard +16V/-16V and 48V for phantom power. A balanced input and output as well as a link for the compressors.

There are still some pins used by some PLC modules (2nd unbalanced input/output for 512 preamps, gain resistance for 515 modules etc.)

A new 51X standard has been introduced to provide additional options by using an 18-pin connector. This allows to add the necessary +/- 24V voltages to some modules while keeping the compatibility with modules typically in 500 format.

Indeed, the 500 modules only use 15 of the 18 available pins.

This allows new functions but we can go even further by making the backplane modular. This is why Labo K Effects has studied the problem and is able to offer 3 types of backplanes that can be fitted to the 500 boxes.

These backplanes use 18-pin connectors to be compatible with the 500 and X51 standards. These backplanes have been named the K551X. 

The K551X are available in 3 versions for the moment.

A standard version with 4 slots, a standard version with 2 slots to create a 10 slot backplane (4+4+2)

The 3rd version with 2 slots is special. It allows 2 adjacent modules to communicate via a relay system controlled by one of the 2 modules.

This allows 2 adjacent modules to have independent inputs and outputs while being able to be chained if desired.

Take for example a microphone preamplifier and equalizer connected to this backplane. An Insert switch on the preamp module would allow the EQ to be inserted into the preamp path.

The different types of backplanes are powered by a PSU BUS using IDC connectors

This modular system makes it possible to develop modules using different connectors if more options are required. It is sufficient that the backplane is compatible with the PSU bus.

This system allows you to change configuration very easily by replacing one backplane with another adapted to the new module.

K551X Format manual

Rack 19 format K551X by Labo ★ K Effects

Rack 19 for 8 x 500 format modules0

Compatible with X51 and K551X

Integrated power supply

Rack
Format 500
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Mastering Comp EQ by Labo ★ K Effects

VCA Compressor (Type MIX BUS SSL 4000), EQ style Pultec - stereo

This is the Deluxe version of the Mixbuss SSL4000 compressor. The stereo compressor has all the options/improvements of the famous GSSL compressor. The design of the electronic boards has been completely redesigned by Labo K Effects. The switches used are Grayhill switches known for their high quality and durability. The frequency dosing potentiometers in passive filters such as PULTECH have been replaced by switches in order to provide accurate stereo settings. A mixing section of the 3 available signals (Direct, post compressor, post equalizer) has been added to refine the processing result. Double sidechain (Turbo), double low-cut filter (Oxford), reduction of bass compression distortion via germanium diode. Stereo passive equalizer type PULTEC EQP-1A3 pre-/post-compressor positionable 3 source mixer for parallel compression Direct-Equalizer-Compressor
Truebypass of the unit

• EQ switchable pre / off / post compressor
• Double Sidechain (Turbo)
• Stereo side chain filter (oxford double)
• Parallel source mixing: direct/EQ/Compressor
• Truebypass switchable by relay.
• 110/220V AC Power

Stereo Equalizer Features :

Stereo compressor based on the Mixbus SSL compressor of the 4000 series consoles features:

Stereo mixer 3 sources:

Custom Summing by Labo ★ K Effects

19 inch 3U rack containing 4 vintage stereo output stages.

Each stereo output stage can be assigned to a pair of inputs or to the summing via a 4 way high quality selector.
Each stereo output stage has a volume control.
A selector allows to listen the desired output stage via a monitor output with a volume control.

• 2 Neve 1073 ouput stages
• 2 Neve 51 ouput stages
• 2 API 325 ouput stages
• 2 Lawo DV975 ouput stages
• 3 stereo inputs via XLR
• 8 mono inputs via balanced jack connectors
• 32 inputs via 4 D-sub connectors
• 4 stereo outputs via balanced Jack connectors
• 2 Monitor outputs via XLR
• 220V AC power supply

LAWO DV975 Summing by Labo ★ K Effects

19 inch 2U rack containing 1 LAWO DV975 stereo summing bus

• 8 inputs via stereo jack connectors
• 32 inputs via 4 D-sub connectors
• Pan facility on 6 first channels by potentiometer
• Output volume potentiometer
• 220V AC power

Neve B723 Output stages by Labo ★ K Effects

Here is the missing link between the digital world and the analog world. This Neve Series 81 desk stereo output stage allows you to warm up the sound of DAO interfaces or digital desks on stage. This unit also gives the "NEVE" sound to any audio device. The board used has 2 output stages driving Marinair transformers providing a gain of 10dB adjustable by potentiometer. Trimmers to adjust the gains are available on the front. A way to boost your system.

• 2 channels with 10dB adjustable gain with 26dB hedroom
• Trimmers available on front
• Unbalanced inputs on XLR
• Marinair Transformer balanced outputs
• XLR output connectors
• 110/220V AC power supply

Neve BA723 Output stages by Labo ★ K Effects

19 inch 2U rack containing a Neve BA723 board used in the outputs of the NEVE 81 series mixers.

This card features 6 transformer balanced output stages (the famous oranges transformers) drived by push-pull and can provide your various devices and preamps the Neve sound quality.
The BA723 Ouput Stages allows to balance 6 channels. Ideal for 5+1 mastering

• 6 channels with 14dB adjustable gain with 26dB hedroom
• 2 stereo ways and 2 mono channels
• Unbalanced inputs on combo XLR/Jack
• Transformer balanced outputs
• XLR output connectors
• 110/220V AC power supply

DOWNLOAD NEVE BA723 OUTPUT STAGES MANUAL

Neve BA723 Matrix by Labo ★ K Effects

19 inch 2U rack containing a Neve BA723 board used in the outputs of the NEVE 81 series mixers.

This card features 6 transformer balanced output stages (the famous oranges transformers) drived by push-pull and can provide your various devices and preamps the Neve sound quality.
The BA723 Matrix allows to balance 6 channels and to combine them of various manners making of this device one quality audio tool. Ideal for 5+1 mastering

• 6 channels with 14dB adjustable gain with 26dB hedroom
• Possibility of controling several channels by a single potentiometer
• Possibility of direct input to several outputs
• Many possible combinations
• Unbalanced inputs on combo XLR/Jack
• Transformer balanced outputs
• XLR output connectors
• 110/220V AC power supply

DOWNLOAD NEVE BA723 MATRIX MANUAL

FX PEDALS INSERTION by Labo ★ K Effects

Lunchbox containing 1 loop of insert for effects pedals.

Lunchbox containing 2 loops of inserts for effects pedals.

19" Rack containing 4 loops of inserts for effects pedals.

This system makes it possible to use guitar effect pedals via the inserts of analog mixers or interfaces of sound cards.
This allows you to add effects to recorded tracks or live on stage. Each of the 1/4 loops has an XLR line + 4dB input that provides a high impedance output to drive the input of an effects pedal via a Jack connector.
A high impedance input jack allows you to recover the output of the pedal and via a volume control, to attack a balanced output stage + 4dB XLR. This output feeds the insertion return of the mixer or interface.
All effects for guitar (wha-wha, disto, Delay etc ...) can be used.
High impedance outputs can also directly attack an amp to Reaming. High impedance inputs can also be used as a DI Box to directly record the instrument on a track.
The various functions of this device make it a nice tool for the studio or for the stage
Best of all, a 9V power output via a standard connector is available on the front. This power supply has a voltage adjustment with LED voltmeter. The range of voltages ranges from 3V to 10V which makes it possible to go for particular sounds on some pedals, especially distortions or fuzz. (simulation of battery wear)

• 1 to 4 adjustable gain insertion channels
• Ability to insert high impedance effect pedals in a symmetrical loop + 4dB
• Possibility of reamping
• Can be used as a direct line level box
• Adjustable 9V / 1400mA power supply (3V to 10V) by potentiometer with LEDs voltmeter available on the front via a standard connector (negative center)
• Balanced Inputs and Outputs on XLR on the back of the device
• High impedance input an output Jack connectors on the front panel.
• Setting of send gain and feedback volume of loops via potentiometers.
• 115v/220V AC power supply

Neve 1084 Custom by Labo ★ K Effects

Rack 19" 5U containing 4 class A preamps and 4 class A equalizers based on Neve 1084

Class A, mic preamp, line amp and EQ/Filter based on Neve 1084 using Carnhill transformers and inductors (Neve supplier). All discret components

• Preamp:
• Mic Input transformer balanced with switchable 300/1200 Ohm input impedance
• +20dB to +75dB gain switchable in 5dB steps(grayhill)
• Switchable phantom power with LED indication
• Line Input transformer balanced 10Kohms input impedance
• -20dB/+20dB gain switchable in 4dB steps (grayhill)
• Micro/Ligne switch with LED indication
• Filters:
• Hi pass filter switchable (45Hz, 70Hz, 80Hz, 160Hz, 360Hz) -18dB per octave
• Low pass filter switchable (6KHz, 8KHz, 10KHz, 12KHz, 14KHz, 18KHz) -18dB per octave
• Equalizer:
• HF switchable (10KHz, 12KHz, 14KHz, 16KHz, 18KHz) +/-16dB variable
• MF switchable (0.36KHz, 0.7KHz, 1.6KHz, 3.2KHz ,4.8KHz, 7.2KHz, 8.8KHz) +/-12dB variable
• MF Switchable Hi-Q (+/-18dB)
• LF swichable (35Hz, 60Hz, 110Hz, 220Hz, 300Hz) +/-16 dB variable
• EQ/Filters switch with LED indication
• Line Output on Carnhill transformer balanced max+26dB dans 600Ohms
• Output phase switch
• Output volume
• 110/220V AC power supply


• Built on demand with options
• 4 preamps+4EQ, 8 preamps, 6 Preamps+2EQ
• Mic preamp, Line preamp, HiZ input, Hi pass filter, Output volume
• Mic preamp, Line preamp, HiZ input, Hi pass filter, Equalizer, Output volume

T112 Press box by Labo ★ K Effects

Here is an audio distributor or "press box" with an original look and limited edition.
       This military box type "lunchbox" contains 4 channels of distribution of audio signal line level.
Each channel has a balanced input, level setting and 4 balanced outputs.
Inputs 3 to 4 have a switch that selects either its line input or the input of the previous channel as the source. This allows, according to the combinations, to be able to distribute up to 16 lines from a mono source or 8 stereo lines from a stereo source without loss of signal.
The power cord is stored in the removable cover that can hold various accessories.

• Up to 16 balanced mono lines outputs
• Miitary Lunchbox format
• Power supply 110 / 220V AC

AOIP Selective Tube amplifier - 60's

Initially, the selective amplifier AOIP was expected to perform laboratory measurements.
It was modified by Labo ★ K Effects for use as a studio tube preamp filter. It is also possible to use it as a preamp without the filter.

• Balanced Line / Mic input and HiZ instrument input
• 600 ohms transformer balanced output
• A gem for lovers of good sound

Contact

A question, a suggestion, a comment...
Send me an email, call me or join me on Facebook.

E-mail : karim [at] labo-k-effects [dot] com
Phone : 33.6.62.46.29.35

Where to find

• ONLINE SHOP

Acces

9 rue Saint Vivien - 17430 BORDS - FRANCE