Specifications

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2.8.2 Audio Standards
Any audio system being either playback, speech reinforcement or a combination of both, shall be
individually specified based upon existing designs that are deployed within the University in
consultation with ISTS.
Typically a space requiring only program playback shall have suitable low impedance speakers
installed as close as practically possible at ceiling level either side of the projection screen/surface.
The speakers should be appropriately aimed at the target area and not firing across the ceiling.
Should this not be possible flush mounted ceiling speakers throughout the room may be considered
an alternative.
Systems capable of program playback and speech reinforcement shall consist of suitable front of
house low impedance speakers and may be supplemented with delay flush mounted ceiling speakers
suitably positioned throughout the space. Final size and position of all speakers shall be determined
in consultation with ISTS during the design process. In spaces where speech reinforcement is used
the speakers shall, wherever possible, be positioned forward of the teaching area, so as to limit any
feedback.
Passive speakers shall be wired to 100v only when configured as a ceiling array of multiple speakers.
In all other circumstances passive speakers shall be wired to 8Ω stereo. The power handling capacity
of passive speakers must meet or exceed that of the amplifier.
Wall-mounted speaker brackets shall allow speaker adjustment both horizontally and vertically and
allow the speaker to be physically locked into position. Similarly ceiling speakers shall be securely
mounted to ceilings and additional support shall be provided across ceiling T-bar rails as required.
The number and style of microphones (hardwired or radio), audio processing/mixers including digital
sound processors (DSP) and amplifiers shall be at the discretion of ISTS. All products shall be
individual specified for each space in consultation with ISTS during the design process.
All line-level cable runs greater than a length of 2m, or running outside the equipment rack, must be
run fully balanced. Unbalanced line-level runs will only be accepted in consultation with ISTS. All
microphone cable must be run fully balanced XLR without exception. All balanced cable runs shall
use the same phase, ie. Pin 2 = hot.
All spaces must have their audio tuned to minimise feedback and provide the best acoustic
conditions possible. Systems equipped with audio DSP hardware must be configured in a manner
suitable for the space, and must be demonstrated to ISTS prior to acceptance. ISTS may provide
sample/template DSP configurations as a guide.
NOTE: Special consideration should be given to any venue which may include video conferencing
equipment.