Remote Switching And Mute With Jr•2 - Radial Engineering Firefly User Manual

True to the Music
On stage, reversing the polarity is sometimes used by the front of house engineer to better
phase-align the bass amp with the PA system. This can be very effective in smaller clubs where
today's high powered bass rigs can compete with the PA. With acoustic guitars, sometimes
the sound from the PA can cause huge peaks on stage known as hot spots or room modes.
These cause the instrument to prematurely resonate which in turn causes feedback. Reversing
the polarity will electronically 'move' the peak and often solve the problem.
Lifting the ground
Pushing in the ground lift switch lifts the ground connection on pin-1 at the XLR output. When
you do so, this assumes that the instrument and Firefl y are being grounded by another de-
vice such as a stage amplifi er. Lifting the ground lifts the audio ground which in turn will often
eliminate hum and buzz caused by ground loops. After you have connected the system, if you
hear hum or buzz, try pushing in the switch to lift the ground.
REMOTE SWITCHING AND MUTING
The Firefl y is equipped with a remote control jack for the optional
Radial JR2 remote control footswitch. This compact switcher
features two footswitches and three LEDs. Power is supplied by
the Firefl y thus eliminating the need for batteries or secondary
power supply. Connection between the two devices is done
with a balanced cable with ¼" TRS connector at one end and
choice between a ¼" TRS or XLR at the other. The XLR has
the added benefi t of being able to be locked.
With the JR2 connected, you can remotely select between inputs A and B to select the desired
instrument. The second switch is used to mute the Firefl y for quiet on stage tuning via the
always-on TUNER output. Depressing the footswitch illuminates the LED indicators to let you
know which function is active.
JR•2 Connected with a ¼" TRS cable
1
3
Radial Engineering Ltd.
TIP
RING
SLEEVE
SHIELD
2
SHIELD
Wiring diagram for JR•2 connection cable.
JR•2 Connected with locking XLR ~ TRS cable
SHIELD
SHIELD
10
TIP
RING
SLEEVE
TIP
RING
SLEEVE
Firefl y™ Tube Direct Box
®