Lab.gruppen C Series 5:4X - Manual (Page 14)

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C Series C 20:8X, C 10:8X, C 10:4X and C 5:4X Operation Manual rev. 1.1.4
Installation
Once a suitable AC supply is connected, the amplifier can be turned on using the front-panel power switch.
The amplifier then goes through a soft-start sequence as it self-checks its circuits. The fans will blow at high
speed before dropping to idle, and the “power” LED will illuminate.
Inrush power is controlled and limited during “soft start”, enabling multiple amplifiers to be powered up simulta-
neously.
3.5 Grounding
There is no ground lift switch or terminal on the C Series amplifiers. The signal ground is always floating, via a
resistor, to chassis and therefore the grounding system is automatic.
In the interests of safety, never disconnect the earth (ground) pin on the AC power cord.
Use balanced input connections to avoid hum and interference.