PRO DI Series

PRO ONE

The PRO ONE Passive DI is ideal for keyboard instruments, electronic drum pads, DJ equipment and media players. No batteries or +48V power supply are required, and a low distortion isolation transformer is built in.

OVERVIEW

  • .Built-in UNiKA-PROTM EI9AE3R3 1.25:1 isolation transformer
  • .The input socket uses Combo jack
  • .Use TRS jack as through out terminal
  • .There is 0dB/-20dB input signal attenuation switch
  • .The output is equipped with a GND/LIFT switch

DESCRIPTION

PRO ONE is a passive single-channel DI box. No need to install battery or provide phantom power to make it work.
 
PRO ONE has a built-in UNiKA-PROTM EI9AE3R3 1.25:1 isolation transformer, which has a special copper foil layer and a dedicated ground layer, which allows this device to restore high signal/noise ratio and dynamic sound, and can avoid unnecessary leakage caused by radio frequency interference, ground interference and potential difference. PRO ONE is particularly suitable for electronic musical instruments, recording studios and fixed installation projects that do not use mixers. It converts high-impedance signals into low-impedance balanced signals, which facilitates extending the wiring distance and blocking interference.
 
The PRO ONE uses a balanced/unbalanced combo socket on the input, and a TRS through out is convenient for musician to pass the direct signal to the instrument amplifier. In addition, it is equipped with a 0/-20dB attenuation switch, which is suitable for various types of audio signals with high and low impedance. The output terminal is also equipped with a GND/LIFT button to quickly eliminate ground noise.
 
 

INPUT PAD ATTENUATION

The most widely used DI box is to connect electronic musical instrument, sound source of A/V equipment and computers, convert their output signals into balanced signals, and then extend the transmission distance.
The most ideal state is to set the attenuator to 0dB position (button up). For some high-level output signals, you can press the button to make the signal is attenuated by 20dB to avoid clipping caused by signal overload.

 


 

ELIMINATING GROUND LOOP NOISE

The built-in channel independent balanced isolation transformer has solved the potential difference leakage problem. When the system causes a ground loop due to poor wiring, the noise can be eliminated through the GND/LIFT button.
The GND/LIFT button determines whether pin 1 of the output XLR is grounded, grounded when it bounces, and disconnected from ground when pressed.

 

SPECIFICATIONS

  PRO ONE
Circuit principle Passive/Transformer balance output
Input connector 1 x Combo
Thru connector 1 x TRS 
Input pad switch 0/-20dB push button
Output connector  1 x Male XLR through ISO Transformer
Output GND/LIFT switch Push button
Input impedance 1KΩ / 0dB & -20dB
Output impedance 50Ω 
Max. input level before clipping +22dB 
Max Output level +22dB 
Frequency response 20Hz-20KHz, -0.3/+0dB
S/N ratio @20Hz~20KHz un-weight >120dB 
T.H.D. @1KHz 0dBV output <0.02%
Transformer Ratio 1.25:1
Chassis 1.6mm/1.2mm steel cabinet and chassis
Surface finished  Durable complex painting
Dimension (W x D x H) 78 x 124 x 46 mm
Weight 0.55Kg
Shipping weight 0.58kg 
Packing per carton 20pcs/12.20Kgs 
Shipping dimension per carton 305 x 283 x 195mm 

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