Radial Engineering J48 MK2 User Manual

True to the Music
INPUT AND OUTPUT PANEL FEATURE SET
1. -15dB pad switch
A provisional -15dB pad reduces the input signal to the
circuit to ensure a clean and distortion-free signal is
obtained.
2. 48V check LED
Used in conjunction with the low-cut filter switch to
check for phantom power.
3. Left-right merge switch
A unique ‘merge’ function turns the input and thru-put
connectors into a pair of left-right inputs with mono
output at the XLR.
4. 1/4” input and thru-put jacks
These are used to connect the instrument to the direct
box and the direct box to the instrument amplifier.
5. Protective bookend cover
The innovative bookend cover provides protection to
switches and connectors against damage during hectic
stage set-ups.
6. XLR male output
This male XLR output connector is wired to the AES
standard with pin-1 ground and pin-2 hot and puts out a
600-ohm mic level signal.
7. Polarity reverse 180º
This toggles the XLR pin-2 and pin-3 to interface
with older equipment. Also used when combining two
sources (mic & DI) on the same instrument to avoid
phase cancellation.
8. Low-cut filter (-6dB down at 80Hz)
Gently rolls off bass to reduce rumble and acoustic
resonance. Dual function switch also used to check
presence of 48V phantom power.
9. Ground-lift switch
This ground-lift switch breaks the ground between the
input & the output to eliminate hum and noise caused
by ground loops.
10. Full bottom no-slip pad
Provides mechanical isolation to reduce slipping and
electrical isolation from amplifier frames and handles.
Radial Engineering J48 User Guide
2

Radial Engineering J48 MK2 Specifications

General

Brand	Radial Engineering
Model	J48 MK2
Category	Signal Processors
Language	English