Many typical active direct boxes can't handle the load of a battery-powered guitar or bass, which can get as hot as 7 volts. However, the Radial Engineering Pro48 is not only a great sounding active direct box, it's been optimized to produce maximum headroom while working within the limited current available from standard 48V phantom power. This makes the Pro48 ideal for use with acoustic instruments and electric bass guitar.

The compact Pro48 is built road-ready with 14 gauge steel in our unique book-end design that provides protective zones around the switches and connectors. The internal welded I-beam construction assures outside stress will not torque the PC board thus assuring longer product life.

• High-performance active direct box
• Increased dynamic range and headroom
• 48V phantom-powered switching supply
• Ideal for acoustic guitar and bass
• LED for when 48V phantom power is present

• Audio Circuit Type: Proprietary analog circuit with low-noise op-amp
• Frequency Response: 20 Hz - 20 kHz (±1.5 dB)
• Dynamic Range: 99 dB
• Total Harmonic Distortion: 0.001% @ 0 dBu
• Intermodulation Distortion: 0.002% @ 0 dBu
• Phase Deviation:
  • +28° at 20 Hz
  • +1° at 1 kHz
  • -2° at 20 kHz
• Input Connector: 1/4"
  • Input Impedance: 220 kΩ
  • Equivalent Input Noise (EIN): -86 dBu
  • Noise: -82 dB below 0 dBu
  • Maximum Input: +9 dBu
• Output Connector: XLR
  • Output Impedance: 600 Ω
• Features: Input pad, ground lift
• Construction: 14-gauge steel
• Power: +48V phantom - proprietary digital switching
• Conditions: For use in dry locations only, 5-40°C
• Dimensions (H x W x D): 1.75" x 2.75" x 4.25"
• Weight: 1.2 lbs (0.54 kg)