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 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.

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!

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

ProDI™ Using & Applications

This short guide is written for those who are experienced with pro-audio and direct boxes.

The best feature of the ProDI is its 'plug & play' ease of use. All you do is connect the instrument to the ¼” input, the ¼” through jack to the stage amplifier (if there is one) and the XLR output to the PA or recording mixing console and you are done. Any distortion? Hit the -15dB pad. Any noise? Just depress the ground lift switch to engage the transformer isolation.

ProDI™ Specifications

The Radial ProDI is a professional grade passive direct box that employs the same high quality audio transformer used in the ProD2, ProAV1, ProAV2 and ProD8. Designed to be 'plug and play' easy to use, the ProDI supports a standard feature set that is ideally suited for live touring, yet equally effective for the studio. It is able to withstand exceptional signal levels while delivering a clean, natural tone with minimal distortion of all types.

Specifications 
  

·         Audio circuit type: ------------------Passive, transformer based

·         Number of channels: ------------------Single channel (mono)

·         Frequency response: ------------------20Hz ~ 18.5KHz (± 0.2dB) 

·         Dynamic range: ------------------128dB

·         Maximum input: ------------------+18dB @ 20Hz

·         Total harmonic distortion: ------------------0.01% from 20Hz~20kHz @-10dB

·         Phase deviation: ------------------1° @ 100Hz; 8° @ 20Hz

·         Input impedance: ------------------140k Ohms, unbalanced

·         Output impedance: ------------------150 Ohms, balanced

Features         

·         Transformer: ------------------Eclipse ET-DB2, 12:1 ratio

·         Shield: ------------------Faraday, MuMETAL® can

·         Input pad: -------------------15dB 

·         Ground lift: ------------------Disconnects pin-1 at XLR output

·         XLR configuration: ------------------AES standard (pin-2 hot)

·         Connectors: ------------------1/4" in & thru, XLR-M out

General

·         Construction: ------------------14 gauge steel chassis & outer shell

·         Finish: ------------------Durable powder coat

·         Size:  (W x H x D) ------------------70 x 108 x 44mm (2.75” x 4.25” x 1.75")

·         Weight: ------------------.54kg (1.2lbs)

·         Shipping size: W x H x D: ------------------102 x 76 x 165mm (4.00" x  3.00"  x 6.50")

·         Shipping weight: ------------------0.61 kg (1.35 lbs)

·         Power: ------------------       Passive, no power required

·         Conditions: ------------------For use in dry locations only between 5°C and 40°C

·         Warranty: ------------------Radial 3-year, transferable