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The ASD-120 AC Sequenced Power Distro is an extremely compact, low cost
rackmount power distribution system that is ideal for touring PA
systems, touring musical and theatrical acts, mobile recording
facilities, on-location film and video shoots, etc.-any situation where
AC power must be distributed to multiple circuits and a hard-wired,
built-in system is missing, inadequate, or impractical. Use of a Power
Distro is cost-effective, both in terms of the convenience it offers and
the elimination of bulky and expensive parallel feeds and related
connectors. The ASD-120 offers many more features as well.
The ASD-120 allows you to power up and its six circuits in a sequenced
fashion. The sequence is reversed for power down. The delay interval is
user-adjustable via an internal trimpot.
Power sequencing is needed whenever various kinds of equipment must be
powered up or down in groups, rather than all simultaneously. In audio
systems, sequenced powering is often necessary to allow turn-on
transients from low level amplifiers and processors to settle down
before any power amps are turned on, because simultaneous powering would
result in a loud, annoying, and potentially destructive 'pop' reaching
the speakers. And in any large system whose components present an
inductive load to the AC line (including electric motors, power
supplies, and power amplifiers of all kinds), sequenced powering can
avoid excessive inrush currents that cause circuit breakers to trip even
though the steady-state currents are not excessive.
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