TELOS TWOX12 USER’S MANUAL
INSTALLATION
CHAPTER 2 36
• Active balanced
• Line level: -7 to +8 dBu nominal level (See section 3.4.1).
• Headroom: 13dB
• Bridging ≥ 100KΩ impedance
The inputs are designed to be sourced from balanced, line level signals. Older equipment
with a transformer output stage may need a terminating resistor across pins 2 and 3, consult
the manual for your equipment for how to use it with high impedance inputs.
Unbalanced sources may be used by connecting pins 1 & 3 to the source ground while the
signal high is connected to pin 2.
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HOT TIP!
The signal fed to these inputs should be a mix- minus or system performance will be
severely degraded. The only exception Is when the Feed Through option Is used.
See section 2.6.1 for details on mix- minus and section 7.3.1 for Information on the
Feed Through option.
The sensitivity of the send inputs are adjusted using the Audio menu Input Gain selection.
You will need to set these according to the levels expected at the Hybrid input. When in the
studio in position, the left LED level meter indicates the level after the menu adjustment,
but before any of the Hybrid’s digital level adjustments. See Section 3.6 & Section 7.3.1 for
additional information.
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CURIOSITY NOTE!
The Telos TWOx12 has the more common pin- outs used for three pin XLR inputs &
outputs. You can easily remember the correct signals when wiring connectors using
the phrase “George Washington Bridge.” Pin 1 = G = Ground, Pin 2 = W = “+” = White
(typical color in mic cable, if there is no white there will be a red conductor), and Pin 3
= B = “- ” = Black.
2.6.3 POH (Program on Hold) Input
This analog input is for whatever audio you want callers to hear when put on hold, usually
your main program feed. This is a three pin XLR female with the same input pins as the
main inputs. Clipping point is +21dBu.
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