Tangelo Audio Link Eurorack module

The Tangelo Audio Link Eurorack Module is a 1U Intellijel-format, all-analogue, chainable stereo and mono Eurorack mixer channel with independent level control, sine/cosine panning, LED signal and clipping metering, protected low-impedance outputs and a high-fidelity Texas Instruments OPA1679 audio path.

Flexible Mono and Stereo Mixing

Tangelo Audio designed the Link as a modular building block for creating a custom Eurorack mixer. Each Link handles one stereo or mono source, while its chainable architecture allows several modules to combine into a larger mixing system. This approach lets a Eurorack system scale its mixer capacity according to the number of sources rather than dedicating rack space to unused channels.

The module uses the compact 1U Intellijel format, making it particularly suitable for cases with dedicated 1U rows. It requires a compatible Eurorack enclosure and does not support the alternative Pulp Logic 1U format.

Stereo Inputs and Mono Panning

The Link accommodates both stereo and mono signals through its left and right inputs. For a mono source, connecting the signal to the left input while leaving the right input disconnected allows the PAN control to position that signal across the stereo field.

Connecting separate left and right signals configures the channel for stereo operation. In this configuration, the PAN control adjusts the balance of the stereo source.

Tangelo Audio implements a sine/cosine panning characteristic, which provides a natural transition across the stereo image and maintains a musically useful relationship between the left and right output levels throughout the control range.

Chainable Mixer Architecture

Each Link provides a single stereo or mono mixer channel and can connect with additional Link modules to create a larger mixer. Users can therefore configure a system around the precise number of channels their Eurorack setup requires and expand it later as the system develops.

This modular architecture makes the Link suitable for compact systems as well as larger Eurorack instruments that require flexible submixing and routing. Tangelo Audio also applies the underlying technology to the larger 3U Chain module for systems that favour conventional 3U Eurorack space.

Independent Level Control

The Link provides independent volume control for its connected source. Its logarithmic attenuation range extends from 0 dB to -60 dB, giving the channel a response suited to practical audio mixing rather than a simple linear level adjustment.

The combination of dedicated level and pan controls allows each Link to function as an individual mixer channel while remaining part of a larger chained configuration.

High-Fidelity Analogue Signal Path

Tangelo Audio uses a deliberately lean all-analogue audio path to minimise unwanted distortion and preserve signal integrity. At the centre of the circuit sits a Texas Instruments OPA1679 audio operational amplifier, selected to provide high-fidelity audio performance and increased headroom.

The design incorporates high-quality components throughout the signal path. Same Sky audio jacks provide secure connections with minimal mechanical movement and carry ratings for thousands of mating cycles, supporting regular patching in studio and performance systems.

Input and Output Protection

The Link integrates ESD and surge protection on its inputs, helping protect the circuitry against electrical events associated with regular patching and system use.

Its low-impedance outputs also incorporate overload protection. This design combines robust interfacing with the clean signal path expected from a dedicated Eurorack audio mixer.

Signal and Clipping Metering

Four LEDs provide immediate visual feedback. Two green LEDs indicate the incoming signal levels for the left and right channels, while two red LEDs indicate clipping at the module's output.

Tangelo Audio uses large capacitors on the meter power rails to reduce crosstalk between the signal and clipping meters and the main audio path. This approach allows the metering circuitry to provide useful visual information without unnecessarily compromising audio performance.

Why Choose the Tangelo Audio Link Eurorack Module?

• Build a mixer around the system: Add only the number of channels required and expand the mixer as the Eurorack setup grows.
• Handle mono and stereo equipment easily: A single channel can accommodate either source type without requiring separate mixer modules.
• Make better use of a 1U row: The compact Intellijel 1U format adds capable audio mixing without consuming valuable 3U module space.
• Maintain signal quality: The OPA1679-based analogue circuitry provides a clean audio path with improved headroom and negligible distortion.
• Gain useful visual feedback: Dedicated signal and clipping LEDs make level management easier during patching, recording and performance.
• Rely on robust connectivity: Protected inputs, overload-protected outputs and durable Same Sky jacks support frequent use in evolving Eurorack systems.

• 1U Intellijel-format Eurorack mixer module
• Chainable architecture for building expandable custom mixers
• One stereo or mono input channel per Link module
• Left and right inputs for stereo sources
• Mono operation through the left input
• PAN control for positioning mono signals within the stereo field
• PAN control adjusts stereo balance when using both inputs
• Sine/cosine panning characteristic
• Independent channel volume control
• Logarithmic attenuation from 0 dB to -60 dB
• All-analogue audio circuitry
• Texas Instruments OPA1679 audio op-amp
• High-fidelity signal path with improved headroom
• Lean audio path designed for negligible distortion
• Two green LEDs for left and right input signal indication
• Two red LEDs for output clipping indication
• Large capacitors on meter power rails to minimise meter-to-audio crosstalk
• ESD and surge protection on the inputs
• Low-impedance, overload-protected outputs
• Same Sky audio jacks with a secure, low-movement connection
• Jacks rated for thousands of mating cycles
• Expandable by adding further Link modules
• Compatible with Intellijel 1U Eurorack systems
• Not compatible with the Pulp Logic 1U format

This item, like everything we supply, comes with the complete support of our expert team. Our excellent technicians have been specifying, building and supporting studios for over twenty years. If you have any problems with installation, setup or everyday use, they’re never more than a click away, and always happy to help.

You can contact them here.