The J48 from Radial Engineering is an active direct box, elite in design and performance and intended for professional stage and recording studio use.

The unit can be powered from 48V phantom power or batteries, has rugged 14-gauge steel construction and extended, distortion-free headroom via a 10V internal rail voltage capacity.
Ground lift, phase reverse and 80Hz recessed filter switches are also standard.

• Active 48-Volt phantom powered direct box
• Minimal power draw with high rail voltage
• Will not choke when driven hard
• Low inter-modulation distortion
• Low power consumption, high 10V internal rail voltage for extended headroom; advanced design accommodates high output levels from active instrument
  Internal timing chip and switching transformer maintain smooth rail voltage transition and headroom on input
• Highly durable 14-gauge welded steel chass
• Dual function inputs with 2-channel merge feature
• 1/4" Thru connector and XLR output connector for simultaneous sends to console, amplifier
• Polarity reverse switch
• Ground Lift and Pad switches
• 80 Hz filter eliminates low end rumble, creates 3 dB of additional headroom
• No-slip bottom padding maintains positioning, protects unit from ground contamination

The Radial J48 is a great sounding active direct box that has been optimized to produce maximum headroom while working within the limited current available from standard 48V phantom power. By employing a unique switching power supply, the J48 is capable of peak transients to 9 volts without choking. The result is lower harmonic distortion, half the inter-modulation distortion and significantly improved dynamics over other DIs.

Features include a -15dB pad, 180º polarity reverse, a unique merge function to mix two signals to mono, an 80Hz high-pass rumble filter, and ground lift. Like all Radial products, the J48 is built to handle the abuse on the road and features a unique welded I-beam construction for years of trouble free performance.

Options for J48
Radial J-Rack Direct Box rack-mount adaptor

The J-Rack is a unique direct box shelf and 19 inch rack adaptor that allows up to 8 J48 or JDI direct boxes to be rack-mounted in 2 rack spaces. This unique adaptor allows improved inventory management for sound companies allowing DI inventory to be used as stand-alone or rack mount depending on tour needs. T