Dub Filter
Vintage High Pass Filter
King Tubby’s Big Knob
Dub Filter is a filter plugin modeled after King Tubby’s iconic Big Knob, a passive high-pass filter with eleven frequency steps from 70Hz to 7.5KHz. This filter defined the sound of the entire “roots” era of Jamaican music.
On top of the main stepped Frequency knob and the Impedance (resonance), the filter also offers control over its behavior including Magnetism, Character, Dynamics, and Artefacts controls.
We have also included two modulation sources, LFO and Envelope Follower, to enhance the creative possibilities of the plugin, from rhythmic pulsations to organic filter movements.
Dub Filter is available for macOS, Windows, and Linux (VST2, VST3, AU, AAX, CLAP).
It’s also available on the App Store for iOS and iPadOS (AUv3 and Standalone).
Altec 9069B High Pass Filter
Dub Filter is based on the Altec 9069B High Pass Filter as used by King Tubby (and many others) at King Tubbys Studio in Waterhouse, Jamaica. Known infamously as King Tubby’s Big Knob.
Altec launched the 9069B filter in the 60s. It was a passive inductor-based T-network filter that provided 18 dB/oct attenuation with 10 positions.
King Tubby is considered a true pioneer of dub music and his experimentation with an MCI console and Altec filter, along with spring reverbs and delays, led to the creation of his signature style.
The Plugin
We meticulously replicated the original filter’s behavior, expanding it with additional controls and modulation. In particular, three controls allow you to modify the filter behavior in depth:
- Magnetism: Controls the non-linear model of the inductance being used in the circuit emulation, affecting the slope and intensity of the generated harmonic content
- Character: Controls the non-linear behavior of the filter, controlling the amount of harmonic content generated
- Dynamics: Controls how smooth is the frequency change made by the non-linear physical model of the inductance; with extreme settings, the model might sound like an envelope filter
Also available on iOS
Dub Filter is available for iPhone and iPad on the App Store, as a AUv3 plugin and Standalone (IAA).
Download on theApp Store
Dub Filter Demo
Try Dub Filter for free with some limitations: silence for 3 seconds every 45 seconds, saving disabled.
If you like it, you can purchase a license and then authorize the demo version.
macOS
Requires macOS 10.13 or higher
AU, VST2, VST3, AAX, CLAP (64bit only)
Download demoWindows
Requires Windows 7 or higher
VST2, VST3, AAX, CLAP (64bit only)
Download demoLinux
Requires Ubuntu 20.04 or newer
VST2, VST3, CLAP (64bit only)
Download demoSpecifications
- Stepped High Pass Filter
- LFO modulation with multiple waves
- Envelope Follower modulation
- Non-linearities and Inductance controls
- Resizable Window
- Preset system with randomizer
- Brightness and Contrast Controls
System Requirements
Windows
Windows 7 – 11
2GHz CPU, 4 GB RAM
VST2, VST3, AAX, CLAP (64-bit)
macOS
macOS 10.13 – macOS 15
2GHz CPU, 4 GB RAM
VST2, VST3, AU, AAX, CLAP (64-bit)
Universal 2 Binary
Linux
Ubuntu 20.04 LTS
2GHz CPU, 4 GB RAM
VST2, VST3, CLAP (64-bit)
Changelog
v1.0.1 2025/06/18
- Added: macOS 15 Sequoia support
- Fixed: Oversampling Latency when Bypassed
- Fixed: Online Activation on Windows
v1.0 2024/03/26
- Release!
Copy Protection
To activate your plugin you can choose between Online and Offline authorization.
Create an account, log in through the plugin to activate, or download your license file for offline activation.
Activation
1 license up to 3 computers
No iLok
We don’t like dongles
No Internet
No connection required to activate