Crest Audio CKi Series - Manual (Page 2)

Crest Audio, the first company to offer com-
puter controlled amplification now raises the bar.
With the introduction of the CKi series of amplifiers,
Crest Audio has added many standard features that
other manufactures either charge additional for or
don’t offer at all.Whether your requirements are sim-
ple or extremely complex, CKi series amplification sys-
tems are perfect for permanent installations of any
size. As with all Crest Audio amplifiers, reliability and
sonic performance are the most important factors in
the amplifiers design.
With three different types of amplifiers, two
add-on modules, and plug in options, the CKi series of
amplifiers allows you the flexibility to install exactly
what you need to do the job. CKiS amplifiers are the
low impedance series, CKiV units are specially
designed for distributed systems, and CKiX is the 100
Volt, transformer isolated version of the amplifier.
Module options include NxEtherNet and
NxCobraNet cards which can be ordered installed in
the amplifiers or easily added later. The NxEtherNet
card is an ethernet based network module that enables
the amplifier to communicate with NexSys and
MediaMatrix software for control and reporting of
amplifier functions by remote computer control. The
NxCobraNet card incorporates all of the functionality
of the NxEtherNet module plus the ability to decode
2 channels of CobraNet digital audio.
CKi amplifiers standard features include
sequential turn-on / turn-off (STO), input gain switch
(x20, 0dB / .775V, and x40), mode switch (stereo, par-
allel, bridged), ground lift switch, and removable detent-
ed potentiometers. In addition, status LEDs are provid-
ed on the front and rear of the unit for signal, ACL,
IGM, and protect conditions. Power monitoring is by
two LEDs, one which displays that power is present to
the amplifier and one that signifies that the amplifier is
operating (Active LED). Input is through 3-pin euro
style connectors and output is provided on 4 position
barrier strips. Fault I/O closure outputs are provided
on a three pin euro-style connector to alert external
supervisory systems, such as a control room display, if
an amp problem exists.
Amplifier options available include NxDSP
processor plug-in board and the transformer input iso-
lation board. The NxDSP option allows control of
speaker related functions such as delay, EQ, and limit-
ing.The transformer isolation board helps to eliminate
problems with improper audio grounding and imped-
ance mis-matches between equipment.
Crest TourClass protection includes active clip
limiting (ACL) which prevents speaker damage by pro-
viding gentle gain reduction at the onset of clipping.
Instantaneous gain modulation (IGM) monitors speak-
er loads to detect conditions that overstress ampli-
fiers. Autoramp gradually increases gain to the preset
amplifier setting when the amplifier is turned on.
Backed by Crest Audio’s 5 year warranty* and
exceptional service departments, CKi amplifiers are a per-
fect choice for all of your fixed installation requirements.
Sequential Turn-on
connections
Module bay for NxCobraNet or
NxEthernet modules
User resettable AC
mains breaker
Fault I/O for con-
nection to moni-
toring systems
Barrier strip output
connectors
Signal ground
switch
Mode switch for
stereo, parallel, and
bridged mode
operation
Detented rear panel
attenuators with
removable knobs
Status LEDs make
in-rack trou-
bleshooting a
breeze
3 pin euro
style input
connectors
Selectable input
sensitivity
Introduction
2
*USA, Canada, and many other countries.