LA Audio MS1224 - Manual (Page 8)

Page 8
4.0 DESCRIPTION OF CONTROLS
4.1 PHANTOM switch
Individual Phantom Power switches per channel switch +48V on to the Input
connector.
Please note:
To prevent the chance of damage to any external pieces of equipment, do not
use the +48V power option with unbalanced input sources i.e. those where pins
1&3 or 1&2 are connected together.
To avoid loud and potentially damaging electrical noise always turn down all
associated amplifiers and always connect microphones before switching phantom
power on.
4.2 +48V led
This led lights whenever a voltage i.e. phantom power is present at the Input
connector. The Phantom Power source detected can be either internal (via
MS1224 Power Supply) or external (via for example a FOH console).
4.3 PAD switch
This switch inserts a 20dB pad into the signal path. To be used when line level
signals are connected to the MS1224.
Please note:
Maximum input level with the PAD in the 0dB position is 0dBu (0.775V rms) and
with the PAD in the 20dB position it is +20dBu (7.75V rms)
4.4 LISTEN switch
This momentary action push switch connects the channel's signal onto the
monitor bus. The monitoring section is housed in the Power Supply unit - see
Section 6.1 and provides both a visual indication of signal level and headphone
monitoring.