CONTROLS AND CONNECTIONS
20, SEND output
The pre-master A/B audio signal of the output channels is present at these two RCA-type connectors. Therefore, these outputs can be utilized for easy expanding / cascading several DRM 4000.
21, MIX IN input
This unbalanced stereo/dual input can be used connecting another mixer or an additional DRM 4000 allowing easy expanding / cascading.
22, MIX IN control
This control allows matching the level of the input signal to the MIX IN input. Setting the control to its center position (0 dB) leaves the audio signal unaltered. Turning it clockwise provides amplification of up to +10 dB while turning it counterclockwise attenuates the level accordingly.
23, AUX 1-4 RCA-type inputs
These RCA-type inputs allow connecting unbalanced Line-level signal sources, like for instance CD- Players, Cassette Decks, Tuners, etc., to the AUX 1-4 channels.
24, Gain control
These controls allow separately setting the input levels of each MIC/LINE input channel in an amplification range between +10 dB and +60 dB. It is recommended to set the input level so that it matches the desired nominal level or to match the appliance’s optimum internal operation level using the gain controls. In this way you obtain the optimum S/N-ratio. In doing so make sure that the signal-LED lights constantly while, even at the loudest signal peaks, the peak-LED is just not lit.
25, MIC/LINE 1-4 XLR-type inputs
These XLR-type inputs allow connecting balanced signal sources to the MIC/LINE 1-4 channels. The inputs can be matched for use with an extremely wide level range. They are designed to accept microphone levels as well as Line-level signal sources.
26, PAD-switch
Engaging this switch attenuates the audio signals by -30 dB providing the possibility of connecting LINE and MIC signal sources to a single connector. When the switch is not engaged, the corresponding input is configured for the connection of microphones. Engaging the switch allows connecting a balanced LINE-level signal source to the corresponding XLR-type connector.
27, +24V-switch
These switches allow individually activating 24 V phantom power for each MIC/LINE-channel, which allows the connection of condenser microphones or phantom-powered paging consoles.
