Radial Pro DI Passive Direct Box

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Product Description

The Radial Pro DI is a high quality passive direct box that employs a proprietary transformer for both impedance conversion and isolation.The heart of the ProDI is a custom wound Radial transformer. It features an exceptionally high 140kΩ input impedance to reduce loading while enabling the ProDI to handle extreme signal levels at all frequencies without distortion. This is further improved upon with an internal MuMETAL® shield to protect against electromagnetic fields that can cause unshielded transformers to distort.The Radial Pro DI is ideal for acoustic guitars, bass, keyboards and drum machines.

Radial Pro DI 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 – on stage or in the studio

The Radial Pro DI features standard hi-Z input and thru-put 1/4-inch connectors, -15dB input pad and ground-lift switch. The balanced output is 600 Ohm to interface with professional snake systems and consoles. All switches are recessed in a protective zone to shield against damage from the road.

Performance is amazing: linear from 20Hz to 18kHz, the ProDI features exceptionally low harmonic distortion and virtually zero phase distortion in the critical bass and mid zone, making it ideal for performance venues and studio work. Because of the transformer isolation, problems such as hum and buzz caused by ground loops are eliminated, making it very easy and hassle-free to use.

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Helpful Info about the Manufacturer
Phone:  604-942-1001 Warranty:  3 Year Transferrable

Product Specifications

Radial Pro DI Specifications

  • Frequency Response: 20Hz to 20kHz (+/-2.5dB)
  • Harmonic distortion: 0.01% (20Hz to 20kHz)
  • Phase distortion: 1 degree at 1Khz, 8 degrees at 20Hz
  • Common mode rejection: -90dB @ 60Hz
  • Input impedance: 140kOhms
  • Output impedance: 600 Ohms
  • Input pad: -15dB
  • Size (W x H x D): 2.75 x 4.25 x 1.75 inches
  • Weight: 1.2 lbs
  • Construction: 14-gauge steel chassis and shell, baked enamel finish
  • Warranty: 3 year limited warranty

Customer Reviews

Review: Jbrew241 Submitted: 9/26/2019

Product Rating5 out of 5 stars.


The best on the market
Product Rating

Product Review

This is by far one of the best passive DI boxes in the market. Buy a couple and you won’t regret it.

Review: Joshua Query, Submitted: 3/13/2019

Product Rating5 out of 5 stars.



$100 Well Spent!

Product Review

Just what you'd expect, from a company like Radial! Compact, built like a tank, beautiful looks, and solid functionality! I am a pro musician, and play upwards of 50 dates per year. I purchased this to ensure that forgetful bassists and acoustic guitarists are always able to be heard. You won't find a better, more reliable, D.I. in this price range. If you're torn, just pull the trigger on this one...

Review: Lawrence Adams Submitted: 12/30/2013

Product Rating5 out of 5 stars.




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