Listen AudioConnect Series, User Manual

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Headphone Amp Calibration
AudioConnect
TM
Manual
5
Headphone Amp Calibration
When using the Headphone Out of AudioConnect for headphone testing, the Headphone Amp should be
calibrated in the SoundCheck Calibration editor.
Note:
As of SoundCheck 14.01, the headphone out sensitivity is -5.8 dB (typical) when
using Balanced Out Vp values in the Hardware Editor. The calibrated sensitivity
of the Headphone Out is dependent on whether Balanced or Single Ended
connections and Vp values are used in the SoundCheck Hardware Editor. If you
change the Hardware Editor Output Vp values, the Headphone Amp must be re-
calibrated.
Note:
As of SoundCheck 15, a new AudioConnect calibrated device is available in the
Calibration Editor. The output sensitivity is set to -5.8dB as a nominal value.
The following procedure allows you to calibrate the left and right
channels of the headphone amp. This will set the Sensitivity in the
Calibration editor and create a correction curve for both amp channels.
AudioConnect must be set to
Line In
before running the calibration
procedure. You can do this in the
Hardware Editor - Listen Hardware -
Startup Defaults
or from an
Offline Message Step
(select
AudioConnect.MES template). See
Figure 3-1
.

Set Channel 1 and 2 to
Line

Set the Headphone Out to
SoundCheck Output
. The level is
fixed and cannot be adjusted in the editor.

Make sure
Mute
is not checked

Click
Apply
to send the settings to AudioConnect and OK to
exit the editor
This procedure requires the use of a Stereo 1/4” TRS to 1/4” Mono Left/Right cable typically called an Insert
Cable. The wiring is shown in
Figure 3-2
.
Figure 3-1: Message Step
In Out
L R Stereo
Figure 3-2: Calibration Wiring