ADDAC604

While developing our ADDAC105 4 Voice Cluster module we made a new multimode filter to place after the summing mix stage. We were so pleased with its sound that decided to release it as a dedicated filter.
To make it more interesting we duplicated its circuitry to be able to use it in a stereo signal path.
To make it more versatile we added a switch to set the working mode from Stereo to Dual Mono where both filters can be used independently.

In Stereo Mode the Left Cutoff is used to control the Right Cutoff.
In this case the Right Cutoff Knob and CV Input are simply bypassed and will have no impact on the Right Channel operation.
This allows immediate sync of both filter frequencies when the Stereo position is engaged.
Optionally there’s a jumper in it’s back that, when placed, connects the Right Controls back to the Right CV control allowing the possibility to control the offset of the Right Channel Cutoff.

Resonance is independent on both Modes and still has to be set manually to match both channels.

Both the Audio and CV inputs are normalled from the Left into the Right channels.
As standard plugging any input to the Right channels removes this connection.

This module is also available as a full DIY kit.

Tech Specs:
6HP
4 cm deep
70mA +12V
70mA -12V

Note: All specifications and features are subject to change without previous notice.

Oscillator Sink made an indepth demo of this module and was kind to allow us to share it here (fullscreen recommended)

Here's another in depth video, made by Daniele, focused on the sound of the 604

Thanks for your interest in the ADDAC604!

To proceed with a direct purchase, you may fill out the form on our Orders Page.

If you want to obtain it through a shop closer to you, this is our Distributors Page.

Product Safety Information

Eurorack Module

Important Safety Information
This Eurorack module is designed for use within standard Eurorack synthesizer systems and is intended for adult users familiar with modular synthesis and electronic equipment.

Please read this safety guide before installation or use.

General Warnings
1. Electrical Hazards:
• Ensure the power supply matches the module’s specified voltage and current ratings (refer to the product manual). Incorrect voltage can damage the module and pose a safety risk.
• Never connect or disconnect the module while the Eurorack system is powered on.
2. Heat Generation:
• The module may generate heat during operation. Ensure proper ventilation within your Eurorack case to prevent overheating.
3. Sharp Edges:
• The module’s faceplate and components may have sharp edges. Handle with care to avoid cuts or scratches.
4. Small Parts:
• Contains small parts that could pose a choking hazard. Keep away from children and pets.
5. Compatibility:
• This module is designed specifically for Eurorack-compatible systems. Connecting it to non-compatible systems may result in damage or malfunction.

Installation and Use
• Mounting: Secure the module properly in the Eurorack case using the provided screws.
• Power Connection: Verify the polarity of the power cable before connecting to avoid damage to the module or power supply. Use only the included or manufacturer-recommended power cable.
• Operational Use: Follow the module's user guide for instructions on operation. Do not exceed the input/output limits specified.
Maintenance and Handling
• Inspection: Regularly check for loose connections or signs of wear.
• Cleaning: Disconnect the module from power before cleaning. Use a dry or lightly damp cloth; avoid using solvents or water directly on the module.
• Repairs: Do not attempt to repair or modify the module yourself. Contact the manufacturer for support.

Environmental Safety
• Dispose of the module, its components, and packaging in accordance with local electronic waste regulations.

Liability Disclaimer
• The manufacturer is not responsible for any injury, damage, or malfunction resulting from improper installation, use, or modification of this product.

Contact Information

For further assistance, contact our support team at:
Addacsystem, Lda.
addac[at]addacsystem[dot]com

The ADDAC604 is also available as a DIY Kit.
It costs 163€ (Excl. VAT).

To proceed with a direct purchase, you may fill out the form on our Orders Page.

If you want to obtain it through a shop closer to you, this is our Distributors Page.

Here's the detailed step by step Assembly Guide Pdf:
http://media.addacsystem.com/diy_guides/ADDAC604_DIYkit.pdf

DIY Kit for Eurorack Module

Please read this safety guide before installation or use.

Important Notice & Intended Use
• This kit is intended for adult users experienced in electronics and modular synthesis.
• Assembly, including soldering, is required.
• Proper testing and installation are essential to ensure safe and functional operation.
• The completed module is intended for installation in a Eurorack-compatible synthesizer system powered by ±12V and +5V.
• Use outside this scope may result in malfunction, damage, or safety risks.

General Warnings

Electrical Hazards:
• Ensure the power supply matches the module’s specified voltage and current ratings (refer to the product manual). Incorrect voltage can damage the module and pose a safety risk.
• Never connect or disconnect the module while the Eurorack system is powered on.
• Wrong polarity can damage your module or system. Make sure the module is connected with correct polarity.

Heat Generation:
• The module may generate heat during operation. Ensure proper ventilation within your Eurorack case to prevent overheating.

Sharp Edges:
• The module’s faceplate and components may have sharp edges. Handle with care to avoid cuts or scratches.

Small Parts:
• Contains small parts that could cause a choking hazard. Keep away from children and pets.

Compatibility:
• This module is designed specifically for Eurorack-compatible systems. Connecting it to non-compatible systems may result in damage or malfunction.

Assembly Requirements
• Soldering skills are required to complete the module.
• Ensure a clean, well-lit and ventilated workspace free of flammable materials during assembly.
• Use appropriate tools and safety equipment, such as eye protection.

Testing
• Test the module thoroughly for shorts or incorrect assembly before powering it in your Eurorack system. When the unit has malfunctions due to incorrect assembly, the entire Eurorack system might be damaged. It's a good idea to test it in a separate case with only that single module.
• Use a multimeter or other appropriate tools to confirm proper functionality.

Installation and Use
• Mount securely in a Eurorack case using the provided screws.
• Use only the included or manufacturer-recommended power cable.
• Connect only when the power is off.
• Follow the module's user guide for instructions on operation. Do not exceed the input/output limits specified.

Responsibility
Users are solely responsible for proper assembly and testing. Contact manufacturer support (see below) for assistance if needed.

Environmental Safety
• Dispose of the module, its components, and packaging in accordance with local electronic waste regulations.

Liability Disclaimer
• The manufacturer is not responsible for any injury, damage, or malfunction resulting from improper installation, use, or modification of this product.

Contact Information
Addacsystem, Lda.
addac[at]addacsystem[dot]com