Hear Back PRO User Guide
8
HEADPHONE AMPLIFIER
The headphone amplifier outputs are paralleled outputs. When
using multiple headsets, the total impedance should not go
below 16 ohms. The headphone amplifiers are very powerful and
can easily damage in-ear transducers, headphones, and your
hearing; exercise great care in adjusting the master volume. At
32 ohms, the amplifier is capable of sustaining 2 watts of power
per ear! The amplifiers are short circuit protected, and will cause
the status indicator logo to blink RED if overheated.
PAIRING WITH A VIRTUAL MIXER
For FW V2 and V5 only, a Virtual Mixer Card can be paired with
a PRO Mixer allowing control of all the audio channels with
presets and intercom. Pairing can also be done via the iOS App.
• On the Virtual Mixer card, hold the PAIR button until the LED
begins blinking rapidly.
• After a few seconds, the LED will blink about once a second.
Once this happens, press AUX and PRESET on the Hear
Back PRO Mixer you wish to pair with the Virtual Mixer.
• All the LEDs will blink indicating that it is now paired.
• To UNPAIR, hold the AUX and PRESET buttons on the Mixer
that is currently paired with the Virtual Mixer and then turn
the MASTER knob. All the LEDs around the MASTER knob
will light up, indicating the Mixer is NOT paired. After a few
seconds, the LED on the Virtual Mixer card will not be lit.
FOOTSWITCH OPERATION
If using the PRO Intercom Footswitch, it mutes the microphone
signal going to the sound board without any pops or clicks. The
microphone signal is then routed to the Hear Back PRO Mixer
along with a special 22kHz signal that automatically engages
the intercom feature on the Mixer (firmware V1.3 or higher). The
22kHz signal is not only above the human hearing range, it is
also at a very low level – just enough for the Hear Back PRO
Mixer to detect.
ENABLE/DISABLE FOOTSWITCH:
This setting can also be modified via the iOS App.
• Starting with power “off”, press and hold INTERCOM button
while inserting the network cable to apply power.
• Continue pressing INTERCOM until buttons start flashing,
then release.
• Toggle the footswitch function by pressing the AUX button.
LED “on” is footswitch enabled; LED “off” is footswitch
disabled.
• To SAVE and EXIT, disconnect then reconnect power.
• Note: The intercom must be enabled before you can enable
the footswitch function.
UPGRADING THE MIXER’S FIRMWARE
If your current Mixer firmware is below V2.14, call or email us to
request a Firmware Update Card.
Tel: +1 (256) 922-1200 ext .135
Email: support@HearTechnologies.com
UPGRADING WITH THE FIRMWARE UPDATE CARD
1. Unplug the network cable so the Mixer is powered down.
2. Turn the Mixer upside down and remove the two screws that
secure the expansion card cover as shown (set aside the two
screws and expansion card cover).
3. Insert the Hear Back PRO Mixer Firmware Update Card into
the expansion slot as shown. Notice the “UP” printed on one
side of the card. This should be facing the same direction as
the top of the mixer.
4. After the card is inserted, connect a network cable from the
Mixer to either a Hear Back PRO Hub or Mixer Distro that is
powered on. The Mixer should power on and begin the update
process (this takes a couple of minutes to complete).
5. As the firmware updates, the LEDs will illuminate GREEN
one-by-one to indicate the progress of programming the new
firmware into the Mixer’s memory. Next, the LEDs around the
master knob will illuminate PURPLE one-by-one to indicate
the progress of upgrading the user interface – the final step in
the process.
6. Once all of the master LEDs are illuminated PURPLE, wait 30
seconds. It will reboot once it is finished.
Remove 2 screws
and card cover
Insert Firmware Update Card
face “UP” into expansion slot
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