FET-72 Colour Module
FET-72 Colour Module
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Classic German Channel
for Chroma, Mister Focus, & DIYRE Colour
Overview
The Locomotive Audio FET-72 Colour Module puts a fun spin on the classic V72-style tube amplifier circuit by using JFETs instead of vacuum tubes. This module will give you access to the familiar German module sound while offering plenty of options and flexibility.
When set to “Classic” mode (switches set to NFB and Pentode), the FET-72 sounds most like its vintage inspiration, boasting a big, thick low end and smooth top without sounding dark. By removing negative feedback (switch set to NO NFB), the frequency response will be rounded off, making the low end less pronounced. Set to Triode mode, the high-frequency response will drop subtly, and there will be a smoother transition from clean to distorted when using your Colour Palette’s Drive control. Pentode mode is much more aggressive in nature.
The 4-position “HI CUT” (low pass filter) gives you flexibility when driving the module for a harmonic/thickening effect. Using one of the low pass filters will make the naturally brightened result of added harmonic distortion less pronounced, allowing the user to truly shape their sound to taste.
Features
- Triode or Pentode mode
- Negative Feedback (NFB) or No Negative Feedback (NO NFB)
- Output transformer offers depth and weight to the audio
- Jumpered 4-position low pass filter (Off, 18kHz, 12kHz, 6kHz)
- Compatible with Chroma, Mister Focus, and DIYRE Colour
Fully assembled and tested by Locomotive Audio.
Chroma 500 Series module, Mister Focus 500 Series module, or DIYRE Colour Palette must be purchased separately.
Note: Changing switch positions can introduce pops and clicks. It is advised to reduce monitoring volume when switching to protect your ears and your monitors from damage.
*The FET-72 is not made or designed by Telefunken or TAB-Funkenwerk. Telefunken is a registered trademark of Telefunken Licenses GmbH. V72 is a registered trademark of TAB-Funkenwerk. Locomotive Audio and DIYRE are not affiliated with or endorsed by these companies.
Documentation
About Colour
Colour is an exciting new modular platform for creating your own custom analog signal chains. The ever-growing family of modules allows you to bring multiple stages of high end analog processing to your setup a la carte. These are real analog plugins.
The Colour platform consists of Colour modules and hosts like Chroma and the DIY Recording Equipment Colour Palette. Colour modules are ultra-compact, swappable analog circuit blocks that snap into Chroma and impart various types of analog color such as distortion, saturation, compression, EQ, and even echo. Chroma provides drive and wet/dry mix controls, power, and support circuitry for one module.
The Colour Palette is a 3-slot host available as a 500 Series unit from DIY Recording Equipment. In the near future there will be rackmount version of the Colour Palette as well.
INTRODUCING COLOUR
MODULAR MOJO
Colour is an exciting new modular platform for creating your own custom analog signal chains. The ever-growing family of modules allows you to bring multiple stages of high end analog processing to your setup a la carte.
The Colour platform consists of Colours and hosts. Colours are ultra-compact, swappable analog circuit blocks that snap into the host, and impart various types of analog color such as distortion, saturation, compression, EQ, and even echo.
COLOUR HOSTS
Proucts like Silver Bullet mk2, Chroma, Chroma+, or Mister Focus can all host Colour modules. The host device provides level controls, power, and support circuitry for one or two Colour modules.
C-DRV knob simultaneously allows you to adjust the amount of input gain and output attenuation for intuitive level control.
C-MIX knob allow you to blend the smoothly dry and processed signals.
Colour modules can also be used various rackmount and 500 series gear from other manufacturers like DIY Recording Equipment.
BUILD YOUR DREAM CHANNEL
Choose from our growing list of Colour module options to customize compatible Louder Than Liftoff products. There are one or two analog plugin slots you can use to build your dream channel. You can also install any of the Colour modules from DIY Recording Equipment. This is a platform that adapts to the needs of your studio.
Disconnect power, remove the 500 Series module or cover, install the Colour Modules of your choice, and power back on.
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MISTER FOCUS
Choose two modules for each 500 Series unit
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CHROMA
Choose one module for each 500 Series unit
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CHROMA+
Choose two modules, one for each channel
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SILVER BULLET mk2
Choose two modules, one for each channel
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Expand each section to learn more
NERDY DETAILS
COMPATIBILITY
Colour Modules are compatible with Silver Bullet m2, Chroma 500 Series, Chroma+, and Mister Focus products.
They are also compatible with host products from DIY Recording Equipment.
PREMIUM COMPONENTS & BUILD QUALITY
We chose every component in our Colour modules by ear for maximum mojo and its sonic synergy with the rest of the circuit. Our meticulous development process involved both empirical measurement and real-world studio use to validate the design. We also leveraged what we learned designing and building our other products. In this design you will find high end parts from Nichicon, Panasonic, Vishay, Susumu, Wima, and TI. All audio path resistors are 0.5% or 0.1% thin film types for low distortion and noise. Where applicable, some modules features custom American wound transformers and our very own discrete op amp. Our PCBs use high temperature Tg 170 material for long-term reliability. The entire assembly is RoHS compliant (lead free).



