Active PRO 4CH DI

  • .XLR & 1/4” phone jack combo - input connector
  • .Parallel link 1/4” phone jack - output connector
  • .XLR & 1/4” phone jack - output connector
  • .Power on/off switch with an indicator
  • .Provides 0dB, -20dB, -40dB additional attenuation
  • .Ground lift switch
  • .Durable all-steel chassis occupies 1U rack space


The PRO 4CH DI of UNiKA active direct boxes is one of our popular products. PRO 4CH DI is a high-quality active direct box with clear sound for transforming high-impedance unbalanced instrument outputs to low-impedance balanced inputs. The PRO 4CH DI active direct box is ideal for instrument rigs, studios, and pro audio. Every PRO 4CH DI active direct box has been thoroughly tested and offers the best value at an affordable price.


PRO 4CH DI is four separated professional quality active direct boxes in 1U rack space AC powered unit. Its clean front-end circuitry delivers extremely wide and flat frequency response and will reveal hidden harmonics from guitars, basses and keyboards with high-output passive pickups.

The unit has four XLR & 1/4” phone jack combo input connectors, four parallel link 1/4” phone jack output connectors, and four XLR & four 1/4” phone jack output connectors.

The PRO 4CH DI also features a power on/off switch with an indicator, an input switchable 0dB, -20dB, -40dB attenuation pad per channel, and a ground lift switch per channel to eliminate noise associated with ground loops. 

The PRO 4CH DI Active Direct Boxes are all made in sturdy, 1U rack space, and rack-mounted designed. 

For more details about the UNiKA ACTIVE DI BOX, please contact UNiKA Professional Audio at +886 2 2793-3017. Also, visit the UNiKA Electronic Co., Ltd. website at


Input Four XLR & 1/4” Phone Jack Combo Connectors
Attenuator 0dB 20dB 40dB
Impedance 1MΩ 47kΩ 43kΩ
Maximum Input Level Before Clip +9dBu +29dBu +49dBu
Output Four Parallel Link 1/4” Phone Jack Connectors, Four XLR Connectors & Four 1/4” Phone Jack Connectors
Frequency Response (20Hz~20KHz) ±1dB
Residual Noise <-105dBu
Total Harmonic Distortion <0.005% @1kHz, 0dBu Output
Power Supply 110V/220V Switchable
50Hz/60Hz Earth Lift Switch
Dimensions (H×W×D) 44 x 483 x 145mm
Weight 2.4kg
Rack Space 1U