The Radial ProD8 is a high density 8 channel passive direct box designed specifically for keyboard systems in pro touring environments. Each channel features dual ¼” inputs that are pre-merged using a resistive circuit. The dual inputs may be used to sum a stereo signal to mono or for redundant back-up systems in case of equipment failure. A built in effects loop uses a TRS insert jack allowing the dual inputs on each channel to share an external effects device. Local monitoring for each channel is provided via the parallel thru-put connector.
ProD8 is equipped with eight custom wound Radial transformers, each encapsulated inside a nickel mu-metal can to reduce noise and distortion caused by outside magnetic fi elds. To accommodate high output instruments and line level equipment, a -15dB pad is provided on the input panel. XLR outputs are equipped with polarity reverse, ground lift and chassis ground switches to help interfacing with stage and studio environments.
For added flexibility, reversible rack ears allow either panel to face front. The ¼” jacks may be positioned inside the rack to interface with sound modules and samplers or outside the rack for typical keyboard set-ups. The ProD8 is the perfect interface for demanding keyboard systems.
Professional performance
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.
The ProD8 in the Studio
Set the ProD8 rack ears so that the ¼ inputs are on the front panel to make patching different instruments easy. This give you access to the dual inputs and thru-put jacks for quick connection to amps in the studio.
The ProD8 with Rack Synths
Set the ProD8 up with the XLR outputs facing front to accomodate touring racks of modular synths. With the ¼ inputs on the inside of the rack your synths stay connected while sound techs patch the XLR outs into the main snake and PA system.
Using the ProD8 for Backing Tracks
The ProD8's dual summed inputs make it convenient for patching two sources into each channel at the same time. This lets you use the ProD8 for backing tracks with two multi-track running in sync or redundant keyboard setups for live performances
Radial Engineering ProD8 8-Channel Passive DI Features:
- High density 8-channel rackmount DI for keyboards
- Withstands extreme dynamics from high-output sources
- Redundant inputs let you incorporate a backup system
- 1/4" input section with XLR outputs
- Mono 1/4" Insert & Thru input for versatile routing
- Dual 1/4" inputs on each channel with stereo summing
- -15dB Input PAD on each channel
- 180° polarity reverse, Ground lift
- Pivoting Rack Ears to chose which side is front facing (1/4” or XLR)
