BSS Audio
MSR-604ii User Manual version v1.4
Page 12
b) Contact your BSS agent to obtain a mu-metal shield which may be affixed to the
top cover plate of the MSR-602ii.
c) Reduce the number of units in the system. (The stray magnetic field is
proportional to the current demanded from the PSU.)
In all cases, the MSR-602ii and the MSR-604iis MUST be fully supported along
their depth. For touring system, failure to observe this precaution will cause
eventual metal failure of the MSR-II cases which will not be covered by the
guarantee.
The physical dimensions and mounting points for the MSR-604ii and MSR-602ii
are identical.
In large touring systems, it is envisaged that the rear panel input and output
connectors will be wired into a multiway distribution panel forming part of the
same rack. In this way, all cabling for the main system is kept tidy and away from
the front of the unit. The isolated feeds appearing on the front of the unit are
available for the external facilities, and their connection will not interfere with the
in-house cabling system.
As with any microphone stage box system it is advisable to avoid the close
proximity of heavy power cabling, power transformers and all forms of lighting
control equipment.
6
.2 Grounding
In any multi-channel audio system where low level signals are being routed, it is
important to ensure a consistent and positive earthing system to minimise any
possible noise interference and hum loops.
With the use of microphones it is especially important to ensure reliable earthing
and screening not only for these noise considerations but also for safety of the
performers.
The star grounding point is the main ‘front of house’ mixing console, and this earth
is the one used to shield all cables and the microphone body. There should be no
connection between this earth and that of the MSR-604ii chassis, and the system
ground switch on the MSR-602ii rear panel should be set to ‘lifted’.
All the metal casing associated with the MSR-600ii system will be grounded via the
MSR-602ii power cord, and through a separate conductor within the DC power
lead to the MSR-604ii units. The electronic 0v ground will be connected to the
main front of house mixing console earth system via the interconnecting audio
cables.
In general the stage monitor console will be connected to the stage mains power
grounding system so the signal connecting cables to the ‘MON OUTPUT’
connector will require the earth connection to be disconnected. That is, the cable
screening will be derived from the monitor console, but should not be connected
to the electronic 0v earthing system of the MSR-604ii via pin 1 of the connector.
