Radial's most popular direct boxes are known for their tremendous headroom, and the ProDI is no exception. Made to handle active electric guitars, basses, and other high-input instruments, you can count on the ProDI to withstand huge signal levels without distortion.

At the core of its passive design are two high-performance Eclipse ET-DB2 transformers, which deliver a wide frequency range without distortion, even in the critical bass and mid regions. Unlike active circuits that overload when the signal gets too hot, transformers saturate the sound, creating a pleasing effect that rounds the tone and acts like a subtle limiter. The sound is further improved upon with the internal MuMETAL shield to protect against electromagnetic fields that would otherwise distort the sound.

If you're a musician with a hot sound that needs to be reigned in, the ProDI will have your signal perfect for any mixing board you come across. Don't delay in ordering yours!

Radial Engineering ProDI Features:

• Compact passive direct box for stage and studio
• Able to handle huge transients without distortion
• Transformer isolation eliminates noisy ground loops
• Plug-and-play, easy-to-use feature set
• 1/4" instrument input, 1/4" thru, and XLR output

Radial Engineering ProDI Specifications:

• Audio Circuit Type: Passive, transformer based
• Transformer: Eclipse ET-DB2, 12:1 ratio
• # of Channels: Single channel (mono)
• Frequency Response: 20 Hz - 18.5 kHz (+/-0.2 dB)
• Dynamic Range: 128 dB
• Total Harmonic Distortion: 0.01% from 20 Hz - 20 kHz @ -10 dB
• Phase deviation:
  • 1° @ 100 Hz
  • 8° @ 20 Hz
• Input Connector: 1/4"
  • Input Impedance: 140 kΩ, unbalanced
  • Maximum Input: +18 dB @ 20 Hz
• Output Connectors: XLR, 1/4" thru
  • Output Impedance: 150 Ω, balanced
• Features: Input pad, ground lift
• Construction: 14-gauge steel chassis and outer shell
• Power: Passive, no power required
• Conditions: For use in dry locations only, 5-40°C
• Size (H x W x D): 1.75" x 2.75” x 4.25”
• Weight: 1.2 lbs (0.54 kg)