The Radial ProDI is a passive direct box that combines exceptional audio performance with solid dependable construction, making it the ideal general duty direct box for stage and studio.
The heart of the ProDI is a custom wound Radial transformer. It features an exceptionally high 140k? 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 mu-metal shield to protect against electromagnetic fields that can cause unshielded transformers to distort.
This compact direct box begins with 14-gauge steel I-beam skeleton for added rigidity and Radial's unique book-end design that creates a protective zone around switches and connectors. Glass filled nylon connectors and high cycle switches combine with the mil-spec PCB and internal RF filtering to provide durability and noise-free performance. A full bottom no-slip pad provides both mechanical isolation and electrical insulation to further protect against the rigors of professional touring.
The ProDI is ideally suited for instruments such as bass guitar, active acoustics, keyboards and just about anything else! When you consider all of the features and the affordable price tag, it is no wonder the Radial ProDI has become one of the most popular direct boxes ever made.
The Radial ProDI… Spectacular performance at a price that anyone can afford!
Full range passive direct boxes
Isolation transformer eliminates noise
Very low harmonic and phase distortion
Compact and rugged design
Ideal for live sound and studio
Typical ProDI Applications: Active acoustic guitars, bass guitars, Electric pianos, synthesizers, Drum machines, samplers, DJ mixers, CD, DVD and Mp3 players
Really easy to use
Passive - no batteries or psu required
Isolated to get rid of buzz and hum
Built like a tank
Audio circuit type
Passive, transformer based
Number of channels
Single channel (mono)
20Hz ~ 18.5KHz (± 0.2dB)
+18dB @ 20Hz
Total harmonic distortion
0.01% from 20Hz~20kHz @-10dB
1° @ 100Hz; 8° @ 20Hz
140k Ohms, unbalanced
150 Ohms, balanced
Eclipse ET-DB2, 12:1 ratio
Faraday, mu-metal can
Disconnects pin-1 at XLR output
AES standard (pin-2 hot)
1/4" in & thru, XLR-M out
14 gauge steel chassis & outer shell
Durable powder coat
70 x 108 x 44mm (2.75" x 4.25" x 1.75")
Passive, no power required
For use in dry locations only between 5°C and 40°C