J+4

The Radial Engineering J+4 is a high performance line driver allows -10dB consumer devices to be integrated with professional level +4dB devices for use in broadcast, live sound and postproduction applications.

The J+4 offers a choice of stereo quarter-inch, RCA and 3.5mm mini TRS connector inputs, with discreet electronics providing +17dB of gain. Transformer isolation to eliminate buzz and hum caused by ground loops, while a high-pass filter reduces low-frequency rumble. XLR outputs follow the AES pin-out standard. Up to eight units may be brought together and rack mounted using the Radial J-Rak.

The unit is made from 14 gauge steel with an I-Beam internal skeleton for rigidity – this eliminates stress on the PC board and greatly reduces chance for solder joints to go fail. Switches and level control are protected by the ‘book-end’ design, and the full-bottom no-slip pad ensures the J+4 will not slide.

These features combine to make the Radial J+4 an ideal interface for without introducing noise or artefacts.  The unit was developed by the company’s ‘Texas Team’ of Kevin Burgen and Drake Williams – who both worked directly under Rupert Neve.

The Radial PowerPre, meanwhile is a high-performance microphone preamplifier designed for use in standard API-style lunchbox frame.

PowerPre features a differential design with discreet components throughout, delivering up to 60dB of gain. Ignoring off-the-shelf op-amps, Radial points out that attention has been applied to part selection during the development to ensure low noise at all stages, and that the simplicity of the design is reminiscent of vintage equipment.

The unit features a front-panel mounted XLR input for use with desktop workstations and a second XLR input via the lunchbox frame for traditional patchbay set-ups. Phantom power is accessed via a protective set-and-forget recessed switch, preventing accidental damage to older ribbon mics. Other features include a ground lift for the XLR output and polarity reverse. This is augmented with transformer isolation to eliminate hum and buzz caused by ground loops and a 10-segment LED for signal monitoring.

When used with the Radial Workhorse, several new features are possible. Both quarter-inch line-level inputs and outputs are provided, while the Omniport has been designated as a high-impedance instrument input for direct to workstation recording. This is configured with a switching jack that will automatically disconnect the XLR inputs when it is being used. The preamplifier combines full-size discreet components with a transformer coupled output for a vintage ‘feel’ while delivering pristine ultra-low noise for the most demanding engineer.

Shipping: Now

Web: www.radialeng.com

Tel: +1 604 942 1001

March / April 2010