9320 Reference Controller Operating Manual 11 (52)
systems. Using the measurement microphone, continuous sound level monitoring is available with the
SPL display, noise dose logging and hearing health alarms linked to the noise dose.
9320 Reference Controller supports compensation of the monitoring system output sensitivity, enabling
smooth switching between all connected monitoring systems as well as switching to Genelec SAM
monitoring systems controlled by 9320A.
4.2.2 Headphone Monitoring
In addition to the loudspeaker-based monitoring solutions, the 9320 offers a professional-grade
headphone monitoring output, support for personal headphone sound character calibration and access
to Genelec Aural ID technology enabling rendering of audio using a personal HRTF for reliable stereo
and immersive channel layout monitoring with accuracy similar to using loudspeakers.
The headphone output is usually described using the headphone sensitivity or the headphone efficiency.
The headphone sensitivity explains how high sound level is created with a known magnitude of
electronic input, given as dB SPL per input voltage. The headphone efficiency is given as the sound
level (dB SPL) generated with a given input electrical power. One of these figures is usually stated in the
data sheet of a headphone and can be used to understand the maximum sound level a headphone can
reach with 9320 headphone amplifier.
The headphone amplifier in 9320 supports professional headphones in the impedance range 16–600
ohm. The maximum output current to the headphone is 120 mA, and the maximum output voltage is 6
Vrms. The maximum output power to the headphone depends on the headphone impedance (see Table
1). At higher headphone impedances the maximum output power will reduce.
Table 1. Headphone output support range
Headphone output load condition
Headphone
impedance
(Ω)
Max output
power
(mW)
Max output power into two simultaneous output
channels, both channels loaded
16 120
32 140
150 200
300 115
600 57
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