Operation Manual
5. Operation and performance
C SERIES Operation Manual rev 2.0.0
17
settings and thereby avoid problems. In the rare event that conditions are extraordinarily severe, the amplier will
shut down until the fault or problem setting has been rectied or adjusted. These sensing circuits are also feed
back voltage and current level information, via a side chain, to the limiters. Sensing circuits also transmit local
amplier module temperature and power supply temperature to the appropriate protection mechanisms. Please
refer to the Protection, Faults and Warnings section for further details.
5.3.2. Headroom, sensitivity and VPL / Gain settings
The input amplier and limiter system is designed to accommodate extremes of performance. Typically, exceeding
maximum input by much as +10 dB will only result in a 1% increase in distortion.
NOTE: If you use the level potentiometer in the signal chain to reduce the level by an amount greater
than the headroom relative to input sensitivity, AND you drive the amplier to clip level, you are in
danger of clipping the input stage before the current or voltage peak limiters are activated.
NOTE: When bridging two channels, you must add +6 dB to the input sensitivity to achieve maximum
output voltage due to the automatic -6 dB gain compensation inserted by the amplier.
5.4. Audio Input and Output connections
5.4.1. Balanced / Unbalanced Input connection
Electronically balanced, Phoenix-type inputs are provided on all channels. Follow the +,– and Ground labels when
connecting the input signal.
Figure 5.4.1: Phoenix-type input connector eld