Sirus Live M416, Manual

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7.4. Balanced connections
A differentially balanced connection hast two signal wires + (hot) and signal – (cold) and a shield. The
signal source generates positive going polarity down the + wire and negative polarity down the – wire.
The destination input stage accepts the + signal on its non-inverting (+) input pin but it inverts the –
signal, adding it to the + signal. The result is that the wanted signal is boosted.
8. Connections at the mixing console
8.1. MONO CHANNEL MIC/LINE IN
The LINE (PAD) switch selects either the MIX XLR or the LINE TRS jack as the
input source. The XLR is normally through the TRS jack so it can be used for
microphone or line level signals when nothing is plugged into the jack socket.
This gives the channel preamp a massive headroom with +34dB maximum input
capability using XLR or jack. Both inputs are balanced but can be wired to work
with unbalanced signals when required. The MIC XLR can be switched to
p48V phantom power for condensers.
Note: Do not connect unbalanced sources or cables to XLR input when
48V phantom power is selected. To avoid loud clicks always turn the
channel off by pressing MUTE when swi48V on or off, and when plugging or
unplugging cables.
8.2. STEREO CHANNEL MIC IN/OUT; LINE IN
8.2.1. STEREO CHANNEL MIC IN
Each stereo channel features a mono microphone XLR input and two
independent stereo line inputs. The balanced MIC input accepts a maximum
+14dBu/3,9V and can be switched to provide 48V phantom power
8.2.2. STEREO CHANNEL MIC OUT
The output of the mic preamp is available on the MIC OUT (BREAKPOINT) TRS jack socket. This is
impedance balanced and operates at a nominal 0dBu/0,77V line level. Plugging into this socket
breaks the signal into the associated stereo channel. That means that the mic preamp can be
used independently of the channel.