Sound Pure's Take

The Radial Key Largo is an all-in-one keyboard mixer, performance pedal, and audio interface designed specifically for live keyboard players and electronic music performers. Combining a 3-channel stereo analog mixer, high-quality USB audio interface, sustain pedal, and remote effects loop into a single, indestructible steel foot-chassis, the Key Largo solves the cable clutter, routing headaches, and signal degradation common in complex multi-keyboard stage rigs.

Equipped with high-performance $24\text{-bit}/192\text{kHz}$ digital converters and Radial’s transformer-isolated balanced outputs, the Key Largo delivers pristine signal quality straight to the front-of-house PA without ground loop hum or digital noise. Its onboard USB connector allows you to run soft synths and backing tracks from a laptop alongside physical hardware synthesizers, while dedicated foot-switches for FX loop bypass and a global gain boost make real-time stage adjustments effortless during a performance.

The Radial Key Largo is the ultimate command center for modern performance keyboardists. If you need to blend multiple hardware synths and software instruments into a pristine, transformer-isolated stereo feed while maintaining hands-free performance control, the Key Largo is an unmatched, road-tested utility.

From Radial Engineering

The Key-Largo is a unique and powerful device that combines a multi-channel keyboard mixer with a USB audio interface, while providing the ability to control elements of the performance with footswitch control.

  • Three stereo analog inputs for keyboards

  • Digital USB connection for laptop soft-synths

  • On-board sustain and effects loop footswitches

  • Separate balanced outputs for the PA and stage monitors

A mixer for today's gigging keyboard player

Designed for stage use, the Key-Largo allows you to connect up to three stereo keyboards, effects and volume pedals, and a laptop computer via USB, managing all these signals to send a balanced audio feed to a PA system for a seamless performance on stage. Three stereo analog inputs feature individual volume controls to balance levels, and each can be sent to a shared effects loop to add reverb or delay in an instant using a dedicated footswitch. A USB connection allows laptop computers to be integrated into the setup for control of soft-synths, and a built-in sustain footswitch and connections for a stereo volume pedal provide additional ways to control your performance.

High headroom, low noise

A switch-mode power supply inside the Key-Largo elevates the rail voltage to 24 volts for extra headroom to handle the most dynamic digital keyboards and the hottest analog synths without fear of overload or distortion. This is paired with 24bit/192kHz digital audio converters for high quality audio over USB when playing soft-synths or pre-recorded tracks. To eliminate noise when connecting multiple devices on stage, the main outputs are transformer-isolated to eliminate hum and buzz from ground loops, and all outputs are equipped with ground lift switches to further reduce noise.

Manage a multi-keyboard setup with ease

The Key-Largo effortlessly mixes multiple keyboard outputs down to a stereo feed for the PA system over XLRs. Add more excitement to the performance with a switchable effects loop and master volume pedal.

Integrate a soft-synth on stage

The Key-Largo can take the MIDI output from a controller to play a soft-synth on your laptop. High quality digital-to-analog converters give you great sound quality on local monitors and at the PA system.

Combine analog and digital on stage

Mix three keyboards together with the output of a laptop soft-synth, making the Key-Largo the center of your performance setup. Connect a ¼” cable to the footswitch input on your main keyboard to utilize the Key-Largo as a sustain pedal, fully implementing the many features of this powerful pedal.

The Key-Largo as a recording interface

24bit/192kHz converters provide more than just high quality playback on stage, the Key-Largo can also be used to record pristine tracks using your favorite audio program. This allows you to easily record studio-quality tracks while on the road, or to capture your live performance.

Audio Circuit Type
Active Circuit with Audio-Grade Operational Amplifiers
Frequency Response
20 Hz to 20 kHz, ±0.5 dB
Noise Floor
-91 dB
Input Clip Level
+12 dBu
Output Clip Level
+24 dBu
Total Harmonic Distortion (THD)
<0.005% @ 1 kHz
Input Impedance
Analog: 20 kOhms
FX Return
50 kOhms
Volume Return
485 kOhms
Output ImpedanceXLR
300 Ohms
FX Send
1 kOhm
Volume Send
300 Ohms
Power
260 mAh, 15 VDC (Center Pin Positive)
Sound Pure Studios Control Room A — Durham, NC

Sound Pure Studios · Durham, NC

Come hear it in our control rooms.

Sound Pure is a working studio in Durham, NC — a 1,000 sq ft live room and two pro control rooms. Book a session to audition gear in a world-class acoustic space before you buy.

$325