Principles of the Audio Transient Suppressor operation:
The ISP Technologies Audio Transient Suppressor is designed to connect between the
audio output of the main outputs of the front of house mixer and the input to the power
amplifiers or powered active speakers. The Audio Transient Suppressor needs to be
connected to the switched power circuit of the mixer, which allows the Audio Transient
Suppressor to turn on and off at the same time the mixer is powered up and down.
Most fixed installations have a single AC circuit that will power up the mixer and any
external signal processing units with a single switch. You simply connect the Audio
Transient Suppressor to the same circuit or use a power strip as your master on off
circuit. The Audio Transient Suppressor has four independent and fully isolated audio
channel paths to connect between the mixer output and power amplifier input. When
the power is applied, the Audio Transient Suppressor will protect or mute the audio
output between the mixer and input of the amplifiers for a period of approximately 4
seconds. On power down the system will sense the removal of AC power in the first ½
cycle and will protect or mute the audio path between the mixer and amplifiers before
any transient can appear. The means that even if there is a power outage the system
will protect your amplifiers and speakers before any damaging transient is present at
the mixer output. The following pages illustrate the waveforms of a typical system and
the output of the system with the Audio Transient Suppressor connected.
NOTE: The ISP Technologies Audio Transient Suppressor will eliminate the turn on and turn off transients
that occur when switching on a mixer or other external signal processing equipment but will not have any
affect on power line surges, lightening strikes or other potential damage from transients in the audio
signal during use. ISP Technologies recommends the use of other power line condition or surge
suppression devices in conjunction with the Audio Transient Suppressor.
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