Radial Engineering ProD8 8-channel Rackmount DI

The ProD8 features up to 8 direct box outputs in a single 1RU rack space for professional touring, with dual ¼" inputs on each channel to incorporate a backup system or connect up to 16 channels of audio at once. A ¼" TRS effects insert jack on each channel allows for connection to various effects devices while adding greater routing options, while a thru-put jack delivers a direct feed to the artist's playback system. The front panel features isolated XLRs for balanced low-noise outputs, each equipped with ground lift and 180° polarity reverse switches. 

Transformer driven for greater headroom & low noise

The engine inside the ProD8 is a custom wound Eclipse ET-DB2 transformer that performs both the impedance matching and balancing. Linear from 20Hz to 20kHz, it is able to withstand the extreme dynamics common with today's digital keyboards. Unlike active circuits that overload and square wave when the rail voltage is exceeded, transformers saturate. This means that as the signal increases, the ProD8 naturally rounds out the tone producing a warm Bessel curve reminiscent of the very best vintage audio gear. The other significant advantage to this passive design is 100% galvanic isolation between the source and destination, which eliminates hum and buzz caused by ground loops.

Adaptable Configuration

To enhance setup options, the Radial ProD8 is equipped with reversible rack ears. This handy feature allows the system tech to position the inputs on the front of the rack when interfacing with external keyboards or have them inside if the setup is predominantly equipped with rack modules.

Key Features

• 8-channel passive rackmount direct box
• Optimized for keyboards, playback systems and high-output sources
• Custom Eclipse ET-DB2 transformers
• Dual 1/4-inch inputs per channel for redundant sources
• 1/4-inch TRS effects insert on each channel
• Thru output on each channel
• Input pad, polarity reverse and ground lift
• Reversible rack ears
• Completely passive operation

Specifications

Audio

Audio Circuit Type: Passive, Transformer Based
Transformer: Eclipse ET-DB2, 12:1 Ratio
Channels: 8
Frequency Response: 20 Hz – 18.5 kHz (±0.2 dB)
Dynamic Range: 128 dB
Total Harmonic Distortion: 0.01% from 20 Hz–20 kHz at -10 dB
Input Impedance: 140 kOhms, Unbalanced
Output Impedance: 150 Ohms, Balanced
Maximum Input: +18 dB at 20 Hz

Connections & Controls

Inputs: 1/4-inch
Outputs: XLR
Features: Input Pad, 180° Polarity Reverse, Ground Lift

Physical

Construction: 14-Gauge Steel Chassis and Outer Shell
Dimensions: 19 x 6.25 x 1.75 in / 48.3 x 15.875 x 4.45 cm
Weight: 7.2 lb / 3.26 kg
Power: Passive, No Power Required