Paul J. Cox Systems Intros Active DI Units

Jun 27, 2003 12:00 PM, Editors


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Paul J. Cox Systems has launched a range of electronically balanced active Direct Inject systems. Previously manufactured as integrated components of custom studio-build or retrofit projects during the past five years, the DI systems are now being made generally available.

Owner and chief design engineer Paul J. Cox said, "We began building and installing these units into our studio systems many years ago. The demand from numerous artists, producers and engineers who had used our studios and loved the sound of the DI units prompted us to make them available as user equipment." Examples of installs include Westlake Audio, Mike Post Productions, Frontpage Recorders, the Mix Room, Firehouse and many others.

The active DI systems can be used to transform low-level, noisy, unbalanced audio signal—such as keyboard, MIDI module, drum machine or sequencer outputs—into a clean, balanced +4dB signals. Offering a frequency response that is flat from 10 Hz to 60 kHz (+/-0.1dB) and an average -85dBu noise floor, the DI Systems feature 12 dB of additional gain (and can be specified with up to 20 dB) and provide 28 dB of headroom.

The DI systems are available in a variety of configurations, from standalone 8-channel to customized rack-mounting multichannel units with integrated patching capabilities, front- or rear-panel connectors, ground lift switching and custom pinout wiring. Units can be supplied with balanced inputs and outputs to integrate with balanced buffer or distribution systems.

The standard 24-channel DI unit occupies a single rackspace and is 8 inches deep. Front-panel 1/4-inch unbalanced inputs, ground lift switches and rear-panel 90-pin Elco balanced outputs wired to European/Amek, Harp or custom pinout requirements are included. For permanent installation with consoles intolerant to unbalanced inputs, rear-panel unbalanced inputs and balanced outputs on Tascam standard D-sub or 56- or 90-pin Elco connectors can be supplied. All rackmount DI systems are supplied with an outboard +/- 18.65-volt linear power supply module that can run up to five 24-channel DI units.

Eight-channel systems are available either as stand-alone floor or countertop units with top-mounted, 1/4-inch inputs, ground lift switches and multipin outputs, or as a wall-mount or permanently installed unit incorporating multipin connectors for inputs and outputs. Stand-alone 8-channel DI units include an integral power supply.

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