CKi
SERIES
CKi Series
Power Amplifiers
Crest Audio, the first company to offer computer 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 simple or extremely complex,CKi series amplification systems 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, parallel, bridged), ground lift switch, and removable detented potentiometers. In addition, status LEDs are provided 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 isolation board. The NxDSP option allows control of
speaker related functions such as delay, EQ, and limiting.The transformer isolation board helps to eliminate
problems with improper audio grounding and impedance mis-matches between equipment.
Crest TourClass protection includes active clip
limiting (ACL) which prevents speaker damage by providing gentle gain reduction at the onset of clipping.
Instantaneous gain modulation (IGM) monitors speaker loads to detect conditions that overstress amplifiers. 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 perfect 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.
CKiS Series
Designed to drive low impedance loads
power ratings are Watts per channel, both channels driven, 1kHz,0.02% THD+N
lbs / kg
* circuit breaker rating, 120 V / 4 Ω
Model
CKi100s
CKi200s
CKi400s
CKi800s
CKi800-2s
CKi1200s
CKi1600s
Stereo
8 Ω
60W
120W
255W
440W
420W
630W
815W
4 Ω
90W
175W
320W
670W
670W
940W
1130W
2 Ω
N/A
N/A
N/A
N/A
870W
1130W
1440W
Bridged
8 Ω
180W
350W
510W
880W
880W
1880W
2260W
4 Ω
N/A
N/A
N/A
N/A
1740W
2260W
2880W
Class
AB
AB
AB
AB
H
H
H
RMS
22V
32V
56V
64V
64V
78V
90V
Maximum
31V
45V
64V
90V
90V
110V
127V
Model
CKi100s
CKi200s
CKi400s
CKi800s
CKi800-2s
CKi1200s
CKi1600s
1/8 power
612
1100
2120
3584
1210
3164
3154
1/3 power
780
1380
2820
4700
3600
5040
6525
Rack U
2
2
2
3
3
4
4
Weight
26.63 / 12.09
29.44 / 13.37
30.44 / 13.82
50.20 / 22.80
70.65 / 32.08
70.65 / 32.08
70.65 / 32.08
Idle (120V)
.5A
.6A
.7A
.7A
.7A
1.3A
1.3A
1/8 Power
1.65A
3.0A
5.8A
10.0A
4.2A
9.6A
10.0A
1/3 Power
2.3A
4.2A
8.6A
14.8A
12.1A
17.3A
22.6A
Maximum*
3.5A
6.5A
12A
15A
20A
26A
30A
4
CKiV Series
Designed specifically for 70 Volt distributed applications
* circuit breaker rating, 120 V
lbs / kg
Model
CKi100v
CKi200v
CKi400v
CKi800v
CKi1600v
CKi2400v
70.7 Volt
50W
100W
200W
400W
800W
1200W
140 Volt*
100W
200W
400W
800W
1600W
2400W
Class
AB
AB
AB
AB
H
H
RMS
92V
92V
92V
92V
92V
92V
Maximum
130V
130V
130V
130V
130V
130V
70.7 Volt power rating is Watts per channel, both channels driven, 20Hz -20kHz, 0.02% THD+N
*bridged mono operation
Model
CKi100v
CKi200v
CKi400v
CKi800v
CKi1600v
CKi2400v
1/8 power
269
816
1304
2540
2600
3100
1/3 power
304
932
1634
3263
5000
6500
Rack U
2
2
2
3
4
4
Weight
25.26 / 11.47
27.20 / 12.35
30.66 / 13.92
50.20 / 22.80
70.65 / 32.08
70.65 / 32.08
Idle (120V)
.5A
.5A
.6A
.8A
1.3A
1.3A
1/8 Power
.76A
2.2A
3.6A
7.0A
8.0A
10.0A
1/3 Power
1.02A
2.83A
5.1A
10.1A
17.0A
23.0A
Maximum*
2.5A
4.2A
7.0A
15A
30A
30A
CKiX Series
Engineered for 100 Volt transformer isolated systems
50, 70.7, and 100 Volt power rating is Watts per channel, both channels driven, 40Hz -20kHz, 0.1% THD+N
*50 and 70.7 Volt units are options that must be specified at time of order
lbs / kg
*circuit breaker rating, 240 Volt
Model
CKi150x
CKi300x
CKi500x
CKi800x
Stereo
50 Volt*
75W
150W
250W
400W
70.7 Volt*
75W
150W
250W
400W
100 Volt
75W
150W
250W
400W
Bridged
200 Volt
150W
300W
500W
800W
Class
AB
AB
AB
AB
RMS
105V
105V
105V
105V
Maximum
150V
150V
150V
150V
Model
CKi150x
CKi300x
CKi500x
CKi800x
1/8 power
363
555
810
1195
1/3 power
427
1683
1024
1536
Rack U
3
3
3
3
Weight
32.00 / 14.55
35.00 / 15.91
35.00 / 15.91
57.00 / 25.91
Idle (240V)
.25A
.25A
.3A
.4A
1/8 Power
.57A
1.6A
2.2A
3.5A
1/3 Power
.77A
2.1A
3.2A
5.2A
Maximum*
1.88A
3.2A
4.4A
7.5A
The NxCobraNet®module supports all NexSys control and monitoring functions
as well as delivering two channels of CobraNet digital audio to the amplifier on one ethernet cable. Supported computer controlled NexSys functions include gain, sequential
power, and real time load monitoring.Amplifier monitoring includes input and output level
(VU), DC protect, thermal protect, IGM, clip status, power state,AC mains, heatsink temperature, gain selection, ground lift status, and audio return.
The LED display allows easy in rack readout and monitoring of temperature,
gain,AC voltage, IP address, amplifier ID, as well as CobraNet bundle and channel status.
Individual indicators display fault and mute status by channel as well as ethernet link and
data indicators.
The NxCobraNet module requires no other additions to make it network ready.
The module has an RJ-45 ethernet connection that is made through a Category 5 compliant Neutrik EtherCon connector to ensure a secure connection.
Both the NxCobraNet and the NxEthernet modules can be ordered with CKi
amplifiers or easily installed in the field with two screws and a ribbon cable connection.
The Crest Audio NxEthernet module is designed for clients who need the control of
NexSys but do not need the digital audio delivery that the NxCobraNet module provides.
6
NxCobraNet Module
Optional Module for NexSys Control and CobraNet Digital Audio
NxEtherNet Module
Option Module for NexSys Control of CKi Amplifiers
The Crest Audio NxDSP plug in board
for NxCobraNet and NxEthernet performs
various functions depending on which module
it is used with.
NxEthernet module: provides speaker
processing including limiting, equalization,
speaker alignment, delay and gain.
NxCobraNet module: in addition to
speaker processing the DSP installed in the
NxCobraNet module provides 8 channels of
CobraNet audio decoded to analog outputs
on the back of the module
Input isolation transformers are available for all CKi amplifiers.The plug- in module
can be specified with Sescom or Jensen isolation transformers.The modules can be installed
in the amplifier if ordered with the amplifiers or
easily added in the field.
FA-CKiXFMRJ-ZZ Jensen transformers
FA-CKiXFMRS-ZZ Sescom transformers
NxDSP
Optional DSP for NExSys Control and CobraNet Digital Audio
Input Transformers
Optional Plug-in Input Transformers
Crest Audio reserves the right to make improvements in manufacturing or design which may affect
specification. Crest Audio specification literature is available in electronic form to qualified users.
Contact Crest Audio Inc. for more information.
©2004 Crest Audio Inc.
Crest Audio Inc.
16-00 Pollitt Dr. Fair Lawn NJ 07410 USA
TEL: 201.909.8700 FAX: 201.909.8744
www.crestaudio.com
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