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.

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.

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

(API is a registered trademark of Automated Processes Incorporated)

K551X Format Manual

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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.

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