Radial Engineering J48

Phantom Powered Active Direct Box

Price: $199.99

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, 180deg 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.

• Active 48-Volt phantom powered direct box
  
• Minimal power draw with high rail voltage
  
• Will not choke when driven hard
  
• Low inter-modulation distortion

Construction
As with all Radial direct boxes, the Radial J48 is designed for use in abusive environments such as on fast-paced stages of concert touring. An innovative book-end design provides a protective zone around the switches and connectors that makes it practically impossible to damage these components.

The inner skeletal frame features a unique 14-gauge welded I-beam construction that makes it impossible to torque the PC board. Stress on the printed circuit board can introduce intermittent solder joints, which by all accounts is the primary cause of direct box failure.

An innovative full-bottom no-slip rubberized pad works double duty by assuring the J48 wont slip and slide around when placed on an amplifier. The protective pad also ads an element of electrical shock resistance by providing a mechanical shield from guitar amp handles that are often directly coupled to the amp chassis.

Specifications

• Dynamic range: 130dB
  
• Signal to noise: 119dB@100Hz
  
• Maximum input: 10V
  
• Frequency range: 10Hz~40kHz
  
• Linearity 20~20kHz: 0.1dB
  
• Phase coherence: 10deg at 20Hz, 0deg at 1kHz
  
• Distortion at 20Hz: <0.5%
  
• Input impedance: 220kW
  
• Output impedance: 600W
  
• Construction: Welded steel
  
• Finish: Baked enamel
  
• Input connectors: Two 1/4" phone
  
• Output connectors: XLR male

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