- 3 channel audio loop switcher with bypass: L3 can add up to 3 preamps/equalizers/effectors to create multi-layered musical effects and enhance the richness and dynamism of music whether in daily listening or studio recording, brings more fun and creative space. Also support one button bypass to enjoy the orginal sound and compare the overlay effects of different loops.
- 3-way stereo audio switcher: 2 working modes, suitable for debugging equipment and do contrasts among different devices (3-IN-1-OUT for comparing audio source, preamp, equalizer etc.; 1-IN-3-OUT for amplifiers and active speakers.), specially designed for audiophiles who have several audio sources and outputs.
- Customized VU meter and remote control: with dual large and full-color VU meters (45mm), the backlight color and brightness can be adjusted freely; driven by a dedicated VU driver chip to show the level of audio signal dynamically and accurately in real-time; remote control design, convenient to adjust all settings from the distance.
- Advancd circuits and high-quality sound: with built-in power isolation circuit, no common ground noise will be generated even sharing the same power with audio players; adopts100K high-impedance input circuit, when inputting linear audio, L3 has little impact on the sound source to ensure its the purity.
- Attractive looking and powerful design: all metal case and CNC machined panel with good shielding performance to avoid interference; stepless adjustment knob, all I/O interfaces are gold-plated to ensure the smooth transmission of the original audio signal to minimizes the loss of the signal. Powered by DC 5V, easy to carry and convenient to use at anytime and anywhere.
- Brand: Douk Audio
- Model: L3
- Audio input: Stereo RCA*1
- Audio output: Stereo RCA*1
- Loop interface: 3 groups
- Work Mode: 1-IN-3-OUT/ 3-IN-1-OUT/ 3 channel Loop
- Input level: 0.775V RMS
- Input impedance: 100K
- Frequency response: 20Hz-20KHz (±0.5dB)
- VU meter color: multi-color
- Diameter of VU meter: 45mm
- Backlight brightness level: adjustable (10-level)
- Remote function: supported
- Settings save: supported
- Working voltage: DC 5V(>=0.6A)
- Power interface: USB (type-C)
- Dimensions(W*D*H): 178*118*55mm / 7.00*4.65*2.17in
- Package dimensions(W*D*H): 235*180*90mm / 9.25*7.09*3.54in
- Net weight: 720g / 1.59lb
- Package weight: 900g / 1.98lb
- L3 Loop Switcher ×1
- Remote Control (without 2*AAA battery) ×2
- USB Cable ×1
- User Manual ×1
Warm Tips:
Compatible with most audio devices, but cannot guarantee 100%. If there exists common ground noise, please add an isolation module between L3 and your device.


3 Channel Audio Loop Switch
Douk Audio L3 is a premium 3-channel audio switcher with loop capabilities, featuring customizable VU meters and remote control for enhanced audio routing and effect layering. Gold-plated connectors and advanced circuitry ensure high-fidelity sound, perfect for audiophiles and studio use. Compact and portable, the L3 elevates your audio experience.

Dual VU Meters with Customization
Large, full-color VU meters with adjustable backlighting provide real-time audio level monitoring.

Remote Control Functionality
Easily adjust settings and navigate through modes using the provided remote control.

Stylish and Durable Design
A sleek, all-metal construction with CNC-machined panels offers both style and shielding against interference.

3-Channel Versatility
Douk Audio L3 offers both 1-IN-3-OUT and 3-IN-1-OUT switching modes for comprehensive audio comparison and routing.

Layered Audio Effects
Connect up to 3 effectors for rich, dynamic musical experiences, with a bypass function to instantly revert to the original sound.

Advanced Circuitry for Purity
High-impedance input circuits and power isolation prevent noise, ensuring clean, unaffected audio.

Gold-Plated Connectors
Ensure reliable and clear signal transmission with gold-plated input/output interfaces.

Portable and Easy Setup
Compact design and USB power compatibility make the L3 convenient for use in various audio setups.