10 BASS: This lights up during special adjustment modes bass frequencies (seesection 4.2. Special active source selection mode and setting adjustments) TREBLE: This lights up during special adjustment modes, treble frequencies (seesection 4.2. Special active source selection mode and setting adjustments) LIN 1, LIN 2, MIC: These light up during special modes, selection of activesources and adjustments (see section 4.2. Special active source selectionmode and setting adjustments)4.5. Micro switches on the rear panel REMOTE: Turn on (ON) the remote control from the WPmVOL or WPmVOL-SR wallpanel connected to the REMOTE port. NOISE GATE: Turn on (ON) or turn off the noise gate function for the microphoneinput. When this function is active the microphone input is muted whilst there is nosignal above the function activation threshold, so the equipment rejects backgroundnoise captured by the microphone connected to it. TALKOVER: (ON) or off according to the priority of the microphone over the lineinputs. When the TALKOVER function is on, the microphone signal will attenuateto the line selected (LINE 1 or 2) when the activation threshold set is reached. AUTO STANDBY: Switch the AUTO STANDBY function on (ON) or off. When thefunction is on, the CA40 will automatically go into STANDBY or low consumptionmode in the absence of audio signals in its inputs. BRIDGE / MONO (y STEREO): Select the work mode of the amplified outputs of theunit:o BRIDGE y MONO OFF: Work in stereo mode L / Ro BRIDGE ON (and MONO in ON or OFF, indistinctly): Work in bridge mode,amplifying the L+R signal through both channels together as a singleamplifier with joint power.o BRIDGE OFF y MONO ON: Work in MONO mode, both channelsindependent and each of them amplifying the L+R signal.