Hear Back PRO User Guide
*Cable complying with the National authorities (cable with an outer jacket or sleeving rated VW-1 or better).
Mixer logo is solid RED
• No audio data is being received.
○ If an off-the-shelf gigabit switch is being used, the Mixer may not be seeing the Hub clock.
− Attempt to bypass the network switch, making a home run from Hub to Mixer, to verify this is the problem –
if so, try a known good network switch from the list at the beginning of the Hear Back PRO User Guide.
○ Check the orange and green LEDs on the Ethernet port of the Mixer and ensure that you see a solid lit orange
LED and a blinking green LED. The lit orange LED indicates that a gigabit Ethernet link is established and the
blinking green LED indicates data is being received.
− If the orange LED is not lit or it lights intermittently, there is a problem with the cabling between the Mixer
and the Hub. To verify this, use a known good short Ethernet cable to plug the Mixer directly into the Hub. If
the problem still occurs, contact our technical support department.
− If the mixer works with the short piece of known good Ethernet cable, investigate the cable between the
Hub and the Mixer location.
− CAT6* cables, used for HBUS or going to PRO mixers, can be run 100 meters (328 feet) with no problems.
Note, due to advanced internal termination techniques, cables used with the PRO series can be run up
to 500 feet in ideal conditions (one piece of solid conductor CAT6* with no breaks or couplings). Utilizing
proper punch-down and the correct RJ-45 connectors is key. The more breaks/connections/couplings in a
cable run, the more limited this distance will be. Poor quality cabling will also limit the maximum distance.
− Running CAT6* cables alongside AC cables, florescent light fixtures, or computer network wiring will also
limit the maximum distance. It is always preferred to run the Hear Back PRO CAT6* cabling by itself, away
from other cabling.
− ALL cabling should be electrically tested before use. Contact an expert network professional for assistance
with wiring installation.
Mixer Logo is PURPLE
• Mixer is not receiving all audio packets.
○ Verify Hear Back network is not accidentally connected to a data network. Do not share the Hear Back PRO
network with any other devices.
○ Verify all off-the-shelf switches used are indeed rated for gigabit speeds.
○ If using an off-the-shelf network switch, it might utilize a function known as EEE (Energy Efficient Ethernet).
− Attempt to bypass the network switch, making a home run from Hub to Mixer, to verify this is the problem.
If so, try a known good network switch from the list at the beginning of the Hear Back PRO User Guide.
Mixer Logo flashes RED
• Internal headphone circuit is overheating.
○ Check to verify headphone load is stereo (not mono).
○ Verify 1/4 inch and/or 1/8 inch plug is tip-ring-sleeve (TRS), not tip-sleeve (TS).
○ Look for shorted cables.
○ Verify total load is not below 8 ohms per channel.
When I connect a line level
device to the Mixer line
outputs, I hear a buzz.
• Wire TRS outputs using only black (ring -) and red (tip +) wires.
• Disconnect shield at the Mixer and terminate at receiving end only.
• For unbalanced outputs, wire the ring (- black) to the receiving end sleeve and tie the shield at the receiving end
only. Connect the tip (+ red) to the tip at the receiving end.
When I link two mono
channels, the stereo
spread is incorrect.
• Verify the source (mixer, DAW, etc.) has these outputs panned hard left and right.
○ The pan control of the source determines the stereo spread.
No intercom audio
• If intercom audio can be heard on the transmitting Mixer, but not other Mixers, either:
○ Mixer Firmware is incompatible. Firmware less than 1.7 is not compatible with firmware equal to or greater
than 1.7.
○ Intercom has been disabled (see Intercom Operation on page 7).
The fan does not operate.
• The fan only runs when power supply temperature reaches 43° C or 110° F.
If you need further assistance, feel free to contact Hear Technologies technical support by phone at +1-256-922-1200 or visit our website at
http://www.HearTechnologies.com.
15
NOTES
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