Behringer 904B Voltage Controlled Pass Quick Start Guide

Behringer 904B Voltage Controlled Pass manual cover

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Year 2021

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Behringer 904B Voltage Controlled Pass Specification

The Behringer 904B Voltage Controlled Pass is a meticulously engineered low-pass filter module designed for modular synthesizer systems. This module is a faithful reproduction of the classic Moog modular circuitry, renowned for its rich and warm sound. The 904B offers a frequency control range from 1 Hz to 40 kHz, allowing for precise tuning and sound shaping. It features three control inputs for voltage control, enabling dynamic modulation of the cutoff frequency. These inputs include a fixed control voltage input and two attenuated inputs, providing flexibility in sound design. The module is equipped with a resonance control, which adjusts the filter's emphasis on the cutoff frequency. This feature can produce anything from subtle filtering effects to self-oscillation, making it a versatile tool in sound synthesis. With its robust construction, the Behringer 904B is designed to fit seamlessly into standard Eurorack setups, measuring 8 HP in width. It operates on a power requirement of +/- 12V, ensuring compatibility with contemporary systems. The 904B's authentic analog design and high-quality components guarantee a pristine audio path, ideal for producers and sound designers seeking to recreate the iconic sounds of vintage synthesizers. Its intuitive interface and precise controls make it suitable for both live performance and studio environments. Overall, the Behringer 904B Voltage Controlled Pass offers a blend of historical sound character and modern reliability, making it an essential module for enthusiasts of analog synthesis.

Behringer 904B Voltage Controlled Pass F.A.Q.

How do I connect the Behringer 904B to my modular setup?

To connect the Behringer 904B to your modular setup, use patch cables to connect the input and output jacks to the desired modules. Ensure that the power supply is correctly connected to avoid damage.

What is the purpose of the frequency control on the Behringer 904B?

The frequency control on the Behringer 904B adjusts the cutoff frequency of the low-pass filter, allowing you to control which frequencies are attenuated or allowed to pass through.

How can I troubleshoot noise issues with the 904B module?

To troubleshoot noise issues, check all cable connections for proper fit, ensure the module is securely powered, and verify that there are no grounding issues in your setup.

Can the Behringer 904B be used for high-pass filtering?

The Behringer 904B is specifically designed for low-pass filtering. For high-pass filtering, you would need a different module, such as a dedicated high-pass filter.

What should I do if the Behringer 904B is not responding to control voltage inputs?

First, check that the control voltage source is functioning correctly. Ensure that the patch cables are securely connected and inspect the module for any visible damage or loose components.

How often should I perform maintenance on the Behringer 904B?

Regular maintenance is recommended every 6 to 12 months, depending on usage. This includes checking connections, cleaning dust from the module, and inspecting for any signs of wear or damage.

Can I use the Behringer 904B with other brands of modular synthesizers?

Yes, the Behringer 904B follows the Eurorack standard, making it compatible with other brands and modules that adhere to the same standard.

What is the impact of resonance on the sound processed by the 904B?

Increasing the resonance on the 904B enhances the frequencies around the cutoff point, which can add a distinctive peak to the sound, creating a more pronounced filter effect.

How do I reset the Behringer 904B if it becomes unresponsive?

To reset, turn off the power to your modular setup, disconnect the module, wait a few seconds, and then reconnect it. Power the system back on and test the module again.

Is it possible to modify the Behringer 904B for enhanced functionality?

While modifications can be made, they require advanced technical skills and may void any warranty. It's recommended to consult with a professional technician if modifications are desired.