SKU: 47204482999

JFT Class-A Transistor Colour

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Description

JFT Class-A Transistor ColourThick, musical saturation that shines on any source. Part of the magic of vintage solid state gear is that, because transistors were expensive, they used as few as possible, so each one had to work harder. And when transistors are pushed to their limits, they begin to distort in beautiful ways. The JFT Colour is designed by this philosophy: choose great sounding transistors and then make them work very hard. The JFT employs two class A saturation

Thick, musical saturation that shines on any source.

Part of the magic of vintage solid-state gear is that, because transistors were expensive, they used as few as possible, so each one had to work harder. And when transistors are pushed to their limits, they begin to distort in beautiful ways. The JFT Colour is designed by this philosophy: choose great-sounding transistors and then make them work very hard.

The JFT employs two class-A saturation stages to create a complex, layered character. In the first stage, a NOS JFET generates asymmetrical distortion, clipping the bottom of the waveform but not the top. This type of saturation, which is associated with triode tubes, thickens and warms up the signal while maintaining its integrity. In the second stage, five transistors form a primitive discrete opamp which operates just on the verge of instability. This stage applies a subtle layer of harmonics which give the Colour a “finished” sound.

MKII Improvements

In 2019 to celebrate the fifth anniversary of the Colour Format, we redesigned the first three Colours, the 15IPS, CTX, and JFT, to use only discrete, class-A transistor circuitry. You could think of this as the opposite of an update—we’ve reversed the technology of the Colours back to the late 60’s. The result is an authentic vintage character that’s more nuanced and refined.

Features

  • Discrete, class-A saturation circuitry
  • NOS 2SK170 transistor for musical, tube-like harmonics
  • Compatible with the Colour format
  • Blue PCB
  • Full, step-by-step assembly instructions and guaranteed support
Samples
Resources
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 47204482999

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maurice
Natrona Heights, US
★★★★★ 5
Fit
Color: Black, Size: Large
Well made looks nice. It’s really good. I bought four of them after the first one the price is reasonable.
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Reviewed in the United States on October 31, 2025
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Nancy Byers
Belleville, US
★★★★★ 5
Highly recommend
Color: Navy Blue, Size: X-Large
Very nice
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Reviewed in the United States on May 13, 2026
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Tony68
Birmingham, US
★★★★★ 5
Coofandy Henley
Color: Navy Blue, Size: X-Large
Very comfortably. Nice looking for the light Henley sweater. Very washed.
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Reviewed in the United States on November 19, 2025
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Kindle Customer
Houston, US
★★★★★ 5
Will be a favorite go to if…
Color: White, Size: X-Large
Great soft easy wear shirt. Through no fault of its own, if you have a big belly you might want to size up. I’m not going to punish the shirt with a star deduction for that. A slight belly will happily put you in your regular size category. Other than that, this will probably be one of your reach for fav’s.
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Reviewed in the United States on December 25, 2025
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Kevin
Pawtucket, US
★★★★★ 3
Awkward fit
Color: Light Khaki, Size: Medium
A bit of an awkward fit in terms of size of arms, chest, and stomach. If between sizes I would probably recommend sizing down.
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Reviewed in the United States on March 15, 2026

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