One Control BJF Lemon Yellow Compressor 4K
SKU: 7404000889

One Control BJF Lemon Yellow Compressor 4K

Sale price$150.25 Regular price$166.95
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Description

One Control BJF Lemon Yellow Compressor 4KWhat do musicians look for in an effect called a compressor? Crispness of the tone and percussive elements for a bassist, enhanced sustain for slide playing or a booster for solos with guitars, an enhancing effect for acoustic guitars and other instruments, or recreating the tones of legendary vintage pedals and studio rack gear. Compressors can be used in a variety of ways depending on the style of music and the instrument. Despite the differences

What do musicians look for in an effect called a compressor? Crispness of the tone and percussive elements for a bassist, enhanced sustain for slide playing or a booster for solos with guitars, an enhancing effect for acoustic guitars and other instruments, or recreating the tones of legendary vintage pedals and studio rack gear. Compressors can be used in a variety of ways depending on the style of music and the instrument. Despite the differences there are several compressors that can be called true classics. Famed pedal designer Björn Juhl has created several classic compressor designs over the years, and all of them have a musical and three-dimensional quality that has been referred to by players as “magical” and “beautiful”. Our latest compressor is the LEMON YELLOW COMPRESSOR 4K and has been designed by BJF for One Control.

The role of a compressor is very simple – compress signals above a certain level and amplify signal below a certain level. However, with these two basic concepts there are a wide range of compression styles and sounds that can be created. When discussing typical effects pedal based compressors that are either natural sounding or quite effective and obvious sounding. BJF has always designed compressors to be both beautiful and natural sounding with the clear tones one would get with high-end rack equipment. The LYC4K has been designed to have the three-dimensional warmth of a vintage studio rack compressor while still being able to easily be controlled like a standard compressor pedal. The sounds you can create with the LEMON YELLOW will make you wonder how we got all that studio gear into such a small pedal.

While some compressor pedals will take over your tone and can make it seem smaller, the LYC4K has been especially designed to be effective while maintaining your natural tone – this sense of balance between the elements of “natural” and “effective” qualities is at the heart of our compressor pedal.

The controls for the LYC4K start with GAIN and VOLUME – if you raise the GAIN the overall compression will be stronger, while if the VOLUME level is raised the LYC can be used as a full-scale clean booster or a level cut/limiter type of effect. With an output of up to +18dB, you can use the LYC to boost the input levels of the rest of your signal chain, stacking with other distortion pedals or an already overdriven amplifier. The LYC can add just a touch or a heavier compression while boosting your favorite signal chain. The ratio of compression can vary from 1:1 to 5:1 and always has that clear, natural tone – but if you set the ratio and gain to maximum, you can have a light overdrive tone with fantastic dynamics. You can also use the LYC to adjust the forcefulness and attack of your entire signal chain at the end.

We have also added a BLEND knob to make sure you have as much or as little of the LEMON YELLOW in your tone as you desire. You can focus on the attack transients of your sound – or take it to the ultimate in sustain and compression. Use the BLEND knob to help adjust your tone and keep it clean and noise free. The clean tones mad with single coil-based guitars are beautiful, but they also need some help due to lower output and tonal character. By using the LYC4K you can easily create beautiful tones that make you want to play forever by adding the strength of tone, sustain, three-dimensional sound that envelopes your ears and fingers, and a little glitter on top. With humbuckers or high output pickups, the LYC4K can add a firmer tonal foundation to your tone making it easier and tighter sounding without changing the tone itself. The stability of tone and feel that the LYC4K can give brings peace of mind to guitarists.

Compressors are also said to be essential for slide guitar style playing. Among slide guitarists, there are many that are looking for a compressor that can naturally sustain the sound without degrading the tone – the LEMON YELLOW COMPRESSOR 4K will be one of the ideal compressors for such a task.

Bassists also want a natural compressor that doesn’t alter the natural bass tone – the LYC4K can easily create a sound that makes use of the original tone of the bass from its natural and clean sound by using the BLEND knob – and create unique and overdriven sounds by increasing the RATIO and GAIN.

As usual, our mini-sized anodized aluminum housing has all this technology in a small footprint, with our excellent manufacturing and heavy-duty parts selection. Even as small as the LYC4K is, you can still use a battery when needed. Get all your compressor needs met with the LEMON YELLOW COMPRESSOR 4K

Björn’s take:

“LEMON YELLOW COMPRESSOR 4K (LYC4Kn) is a particularly natural compressor. You will be able to experience an illusion that does not lose its clearness even in loud play. It will be a great presence in slide play. In SUSTAIN mode, you can easily express the play nuances so that you forget you are applying the compressor”

From Kaz:

“After the longest development period in One Control history, our LEMON YELLOW COMPRESSOR 4K is ready. The first prototype was a very simple one-knob design that we all liked but was still not good enough. After some improvements, we had a two-knob prototype that I really felt was ready to be a product, but we continued develop. The completed three-knob + switch version was finally completed and released.

When you reach for the heights and have a distant goal, every step counts. What we were seeking was not bound by knowledge or common sense, but only by our own vision. We spent much time trying to understand the sounds correctly. And the LYC4K has completely overcome the size versus quality barrier. You can play an elegant and professional sound like the studio rack-mount compressors, but in a much smaller and easier to use package.

What do you see in this superior sound?”


‚óè Controls
„ɪ VOLUME: Adjusts the volume. 
„ɪ BLEND: Adjusts the balance between the compressor and the original sound. 
„ɪ RATIO: Adjusts the compression ratio of the compressor. 
„ɪ GAIN: Adjusts the strength of the compressor. 

‚óè Features
・ BJF-designed compressor that creates a clear and natural tone
・ Suitable for various styles due to the operation feeling like a compact pedal
・ You can push the amplifier and use it as a booster Level control
・ Overdrive-like from the clearness of studio equipment
„ɪ High-quality mini-sized case machined from aluminum
・ Built-in battery is also possible
„ɪ True bypass switching 

‚óè Specifications: 
Input impedance: 500K 
Output impedance: 10K 
Drive voltage: 9V 
Current consumption: 10mA 
S / N ratio: -80dB 
size : 39Wx100Dx31H mm (excluding protrusions) 
„ÄÄ„ÄÄ„ÄÄ47Wx100Dx48H mm (including protrusions) 
Weight: Approximately 160 grams

Shipping Notes
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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]
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SKU: 7404000889

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MNKTJ
Natrona Heights, US
★★★★★ 5
Perfect, affordable solution for a second home-office setup
I work from home and occasionally like to office out of a different area of the house, but I didn't want to tear down my entire main rig just to move to another room. I picked this up as a secondary docking station for a more casual monitor setup, and it works perfectly for my needs. Setup & Performance: I have this hooked up to my work laptop and two monitors via HDMI. One thing to keep in mind: you’ll need to provide your own USB-C cable and power brick to juice it up. Just make sure you’re using a high-quality charging block to ensure the dock gets consistent power for all your peripherals. The Value: Compared to the price of a name-brand Dell docking station, the value here is incredible. While the more expensive docks might offer a few extra bells and whistles, this is exactly what I needed without the hefty price tag. Pros: Simple Setup: Very straightforward to get running. Dual Monitor Support: Handles two HDMI monitors with no issues. Compact: Great for a secondary or portable "mini" workstation. Bottom Line: If you’re looking for an easy, inexpensive way to run dual monitors from your laptop in another part of the house, this is the way to go. Great performance for the price!
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Reviewed in the United States on May 6, 2026
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CrankyToday
Carnegie, US
★★★★★ 5
Works well but pay attention **REVISED**
The device has worked well for me. However potential buyers should note that the 2nd USB C port is reserved for power input from a separately purchased power supply. So the device provides only a single USB C port for attaching devices. I use the device on power from my own computer. So undocking my computer requires some careful steps in the correct sequence: (1) eject all external drives; (2) power down the external display; (3) unplug Anker from computer; (4) remove power from the computer. The device comes at a great price, though, so excellent value. *REVISION* After four months of use, the HDMI port seemed to fail--the monitor was indicating that it was not connected. I wrote to Anker support and received a reply within two hours. The reply told me how to reset the docking station. It worked. Kudoes to Anker Support!
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Reviewed in the United States on September 15, 2024
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Chris
Battle Creek, US
★★★★★ 5
Quality multi display hub
Works as intended, good value for the money and reasonably sized. I am currently running two 4K HDMI monitors on it without an issue. Ready to go out of the box and has a sturdy design, would recommend.
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Reviewed in the United States on March 17, 2026
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TAP
Birmingham, US
★★★★★ 4
Anker support comes through
Update: Anker support contacted me and provided a new unit. On this one, the video works fine, both via HDMI and DisplayPort. I'm much happier now that the unit, which I do like, works properly. There is still one video-related quirk that can be annoying, though, if you often unplug the external monitor from the hub but leave the hub connected to the computer. When I unplug the external monitor from the hub, the hub doesn't tell the computer that the monitor is no longer connected (the same thing happened with the original faulty unit). Since the external monitor is my primary monitor when connected, this leads to an irritating set of steps ending up with disconnecting the hub. I reported this issue to Anker support and they forwarded it to their engineering group. Initial review: I like the form factor and the many connection options. They all work fine EXCEPT that the video (whether DisplayPort or HDMI) keeps dropping out. The computer (MacBook Pro M1 14" running MacOS 13.0.1) thinks the external monitor is there, but nothing shows on the screen for a few seconds, then it comes back on, then off again. Anker support says to try updating the firmware, but to do that requires a Windows computer with a USB-C port. I do not have access to such a machine, so I'm stuck. Since one of the primary reasons I want a hub is to handle the video, I have to return the unit. This is a real disappointment since I otherwise have been very happy with Anker products.
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Reviewed in the United States on November 29, 2022
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SeedyROM
Draper, US
★★★★★ 5
Incredible Quality, Incredible Results!!
AMAZING!! I use my Samsung Z Fold with a Maono Podcast Soundboard for podcasting. Having the phone charge from the soundboard power passthrough was inadequate to keep the phone charged, and generated "noise" in the path. I got the Anker 565 USB-C hub, and routed the power and signal through the Anker hub. WOW!! My phone remains fully charged throughout the podcast, there is ZERO "noise" in the signal, and I can actually do more than ever expected! The quality of Anker products has been proven with me Over and Over with every single product I have purchased. From high-end 240w USB-C cords, to Power Banks, Power Blocks, Bluetooth Earbuds & Headphones, across the board; I have never been disappointed! I highly recommend Anker, and specifically the Anker 565 USB-C hub!!
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Reviewed in the United States on November 8, 2025

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