PRO 248 is an active dual-channel DI box. Unlike traditional
DI, PRO 248 uses +48V phantom power instead of the traditional 9V dry cell
battery, so users can use it on the mixer or external phantom power supply.
Power is supplied to PRO 248, the power supply circuit and the output signal
line are shared, and no additional power cord is required. The +48V indicators
are set on the upper cover. The +48V circuit specially selects the British OEP
PT-4 pulse transformer. PRO 248 has a pair of built-in UNiKA-PROTM EI30A10E 1+1:1+1
isolation transformers, 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 248 is
especially suitable for electronic musical instruments, recording studios and
fixed installation projects by using mixers. The PRO 248 uses two TRS sockets on the input, and two TRS
through out are convenient for musician to pass the direct signal to the
instrument amplifier. In addition, it is equipped with a 0/-20dB attenuation
switch and LED indicator, 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. Key Features
Use British OEP PT-4
1:1 audio pulse transformer in phantom power circuit
+48V status indicator
on the upper cover
The input socket uses a
pair of TRS jacks
Use a pair of TRS jacks
as through out terminal
At 0dB input, the set
load impedance is 260KΩ, which can clearly show the high frequency overtones ,
harmonic and graininess of electric guitars or electric bass
