Radial Engineering Pro D2



Stereo Direct Box

 Overview

The Radial ProD2 is a compact stereo direct box developed specifically to address the needs and challenges of a stereo audio system. This passive DI features two independent channels with separate inputs and thru-puts for the artist's stage amp and two fully isolated outputs for the PA system.

At the heart of the design are two high-performance Eclipse ET-DB2 transformers. These deliver 20Hz to 20kHz performance with less than 1.5dB deviation above 18kHz and are able to withstand tremendous signal levels without distortion. Unlike active circuits that overload when the signal exceeds the rail voltage, transformers saturate. This creates a pleasing effect that naturally rounds out the tone, acting like a subtle limiter, which is particularly advantageous when interfacing the digital pianos with samplers and drum machines. Transformers are particularly adept at eliminating hum and buzz by ground loops.

As with all Radial products, the ProD2 is built to tough to handle the rigors of professional touring. A 14-gauge steel ultra rigid i-beam skeleton frame eliminates the possibility of external stress to flex the PC board and cause premature solder joint failure. The innovative book-end design creates a protective zone around the connectors and switches further increasing lifespan. And a full bottom no-slip pad adds mechanical isolation and electrical insulation to further reduce the opportunity for noise.

The Radial ProD2's warm sound, legendary build quality and compact design have made it the most popular stereo direct box made today.

BLOCK DIAGRAM

Features

Stereo direct box designed for keyboards

Smooth, warm sound rounds out digital edge

Able to handle huge transients without choking

May be rack mounted for touring rigs

ProD2 ™ Using & Applications

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

The best feature of the ProD2 is its 'plug & play' ease of use. You can connect the instrument to the ¼ "inputs, the ¼" through jacks to the stage amplifiers or the local mixer and the XLR outputs to the mixing console and you are done. Any distortion? Hit the -10dB pad. Any noise? Just depress the ground lift switch.

ProD2 ™ Specifications

The ProD2 is a high-quality ultra-compact stereo passive direct box that features custom-made Radial transformers. ProD2 is a great choice for stereo keyboards, DJ equipment and consumer hi-fi systems. Its high-performance transformer has an exceptionally linear frequency response from 20Hz to 18kHz and is ideal for electronic instruments. The ProD2 is housed in an extremely rugged two piece 14-gauge steel enclosure with an external shell that prevents damage to the switches, features a -15 dB PAD for high output sources and ground lift.

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

·         180° polarity reverse: : --------------------Inverts absolute phase

·         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