Radial 4-Play Multi-Output Direct Box

The Sanctuary Perspective

The Radial 4-Play is a specialized multi-output direct box and instrument switcher engineered for acoustic multi-instrumentalists who perform with multiple instruments on stage. Instead of requiring four separate DI boxes or forcing the front-of-house engineer to re-EQ a single channel every time you switch between an acoustic guitar, mandolin, bouzouki, or stand-up bass, the 4-Play allows you to connect a single wireless transmitter or instrument cable and route it directly to four independent balanced XLR outputs. With dedicated footswitch control and LED visual feedback, switching instruments on stage is seamless, dead-quiet, and instant.

Product Intelligence & Stage Architecture Profile

• Best For: Multi-Instrumentalists, Touring Acoustic Guitarists, Mandolin/Fiddle/Banjo Players, Solo Performers, and Stage Signal Switching.
• Sound Character: Completely transparent, low-noise signal transfer with pristine transient preservation and zero active coloration across all four output paths.
• Compared To: Eliminates the clutter of running four individual direct boxes on stage, providing a streamlined single-unit interface with dedicated output level adjustments and instant footswitch routing.
• Sanctuary Expert Note: "If you switch between steel-string, nylon-string, mandolin, or acoustic bass during a gig, the 4-Play is a total lifesaver for both you and the sound engineer. FOH gets dedicated XLR feeds for each instrument with their own EQ settings, and you can switch between them silently with a tap of your toe."

Key Features & Stage Engineering Highlights

• 1-Input to 4-Output Routing Architecture: Plugs into a single instrument line and distributes signals to four separate balanced XLR channels on stage.
• Silent Footswitch Operation: Multi-function footswitch scrolls sequentially through outputs 1 through 4 or mutes all channels for silent tuning adjustments.
• Dedicated Level Controls & Mute Logic: Individual recessed trim controls for each output allow you to level-match varying pickup outputs before signals reach the mixing console.
• High-Visibility LED Indicators: Bright, color-coded LEDs provide instant visual confirmation of active channels on dark touring stages.
• Transformer Isolated XLR Outputs: Custom Radial isolation transformers prevent ground loops, 60-cycle buzz, and electrical interference across all PA channels.
• 14-Gauge Steel Construction: Built inside Radial’s signature heavy-duty steel I-beam shell to withstand decades of rigorous stage touring.

Technical Specifications

• Audio Circuit Type: Active Input Buffer with Passive Transformer-Isolated XLR Outputs
• Number of Channels: 1 Input / 4 Selectable XLR Outputs
• Frequency Response: 20Hz – 20kHz (± 0.5dB)
• Dynamic Range: 115dB
• Total Harmonic Distortion (THD): 0.005% @ 1kHz
• Input Impedance: 220kΩ Unbalanced
• Output Impedance: 600Ω Balanced XLR
• Controls: Output Level Trims (CH 1-4), Ground Lift Switches, Select/Mute Footswitch
• Connections: 1 x 1/4" Instrument Input, 1 x 1/4" Always-On Tuner Out, 4 x Balanced XLR Outputs
• Power Requirement: 15VDC 400mA Supply Included
• Chassis: 14-Gauge Heavy Duty Steel