ENDLINE

Endline is the ultimate solution for your audio chain needs. This high-quality 10hp module offers four stereo channels of summing, sub-mix capabilities, two sends and returns, a headphone output, and transformer-balanced outputs. Not only does it process audio with incredible accuracy and clarity, but with its compact 10hp size it also fits seamlessly into your setup. With Endline, you have the opportunity to enhance your audio processing capabilities and enjoy top-of-the-line sound quality that will elevate your listening experience.

Endline is an upgraded version of our previous "SUM" module. It is designed to receive signals from mixers, sub-mixers, and voices, combine them, and output the result.

With this new version, we have implemented several new features, including an output section and dual mono or single stereo sends with two dedicated returns.
The sends and return levels can be adjusted to perfectly interface your modular with your external pedals.

Moreover, a headphone output with a dedicated level control is included.
It features the best-in-class IC that can output 1.5W at 32ohm.
With its 128dB signal-to-noise ratio and 112.5 THD, it is not the average headphone output you can find in the Eurorack world.

The line outputs are transformer-balanced (30Hz to 35kHz) and are driven from Burr-Brown OPA.

Apart from all those mixing/send-return possibilities, this makes Endline one of the cleanest and most high-end options you can choose in the Eurorack to interface with the world. 

Lastly, despite its transformers, the device is only 40mm deep.

HOW DOES IT WORK?

Referring to the layout diagram, Endline comprises six sections, with the main summing areas marked in red and brown.

The red section has two stereo inputs[1], while the brown section has two stereo inputs[3] and one stereo output[2].
If nothing is plugged into the output jacks[2], the signal of the two areas is summed together for a total of four stereo channels or eight mono inputs.
This signal is then sent to the final output(blue) and in parallel to the send area(pink).

Plugging a cable into the output thonkiconn[2] breaks the normalization, allowing you to use the brown section as a sub-mix.
The sum of this area will not be sent to any other Endline area besides the outputs[2].

By default, every input of Endline is normalized from left to right: If a signal is plugged only into a left input, the signal will also be present in the right output.

In contrast, the right inputs will only be present in the right outputs.
This mono-to stereo conversion is handy for mixing stereo and mono signals.
If this behavior is not desired, it can be avoided by plugging a signal (or a dummy cable) into the right section of an input.

The summed area result is sent simultaneously to both the output area (blue) and the send area (violet).
A switch[14] allows you to configure the sends as either stereo or dual mono.
This allows you to use the section as a single stereo send or in mono, and send the signal to two separate effects.

In stereo mode, faders[12] control the send's left and right panning volumes.
In dual mono, they control independent mono copies of the summed signal.

The yellow section on the device is the return section. The switches[13] allow you to decide whether to boost the returns to 10X or keep them at unity gain.
This feature is handy when connecting external pedals that output a signal lower than the modular level.

The bottom switch has a peculiarity: if the 10X option is selected, the sends gain will be divided by 10X to match the pedal's volume input better.

At the final output section, the signals from the summing area and returns are combined and sent out through the balanced 6.3mm final outputs[8] and the 3.5mm headphone jack[7].

A ground lift switch[9] is included to correct potential ground loop issues.
The headphone and final output levels can be adjusted separately within the green area. Potentiometer 6 controls the final output volume, whereas potentiometer 4 adjusts the headphone volume.

A 2x6 LED Vu-METER is included to monitor the final output volume.