NC-MCO - Crest Audio

INPUT PROCESSING MODULE
FOR CKS, CKV & CKX SERIES
POWER PROCESSING AMPLIFIERS
NC-MCO Mono Crossover
Product Information
The NC-MCO Module fits in the Input Processing bay located on the
rear panel of Crest Audio CKS, CKV & CKX Series Power Processing
amplifiers. It is an extremely high quality, fourth-order, two-way electronic
mono crossover that feeds the HF output to channel A of the
amplifier and the LF output to channel B. The HF and LF output levels
and crossover frequencies are individually programmable. Unbalanced
loop-thru barrier strip connectors provide convenient outputs to other
amplifiers.
An internal jumper selects between gains of X20 (26 dB), X40 (32 dB),
or constant sensitivity for full output at 0dBu (.775V) in. The standard
factory setting is for X40 (32dB). Individual channel attenuators are provided
with removable knobs for extra security. The NC-MCO is programmable
via NexSys ® , the hand-held N-Coder or N-Coder/PC software.
(NexSys-compatible Power/Output and Network NC modules are
required for NexSys implementation.)
Features:
• NexSys compatible, programmable two-way, 24dB per octave electronic crossover
• Independent two-way, 4th-order, Linkwitz-Riley filters • Loop-thru HF and LF outputs
• Removable gain pot knobs for security • Simple setup, tamper-proof configuration
• All parameters (including precision attenuation settings) programmable via NexSys , hand-held N-Coder or N-Coder/PC software
• Balanced input on barrier strip connector with .325" (8.3mm) screw center, .270" (6.9mm) lug space
Internal Features:
• Jumper-selectable gain of X20 (26 dB), X40 (32 dB, factory setting), or constant sensitivity for full output at 0dBu (.775V) in.
• Jumper-selectable assignment of high-pass or low-pass output for each amplifier channel
LASS 2
RING MAY
E USED
utput
A
B
Signal
Ground
Lift
Jumper
NC-MCO connections
Designed & manufactured in the USA by:
Model
Name
CKV 100
CKV 200
CKV 400
CKV 800
CKV 1600
CKV 2400
Network
+ – + –
Output Power
@70.7V
50W
100W
200W
400W
800W
1200W
NexSys Bus
PC Lap-Top running
N-Coder/PC software
Data
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
Model
Name
CKS 100
CKS 200
CKS 400
CKS 800
CKS 800-2
CKS 1200-2
CKS 1600-2
Architects and Engineers Specifications - NC-MCO.
The module shall plug into Crest Audio CKS or CKV Power Processing amplifiers in the
Input Processing bay. The module shall be NexSys-compatible. The module shall provide a
two-way, 24 dB per octave electronic crossover with programmable HF and LF output levels,
HF and LF crossover frequencies, overall output level and HF/LF polarity inversion.
The module shall be controlled/programmed either by NexSys via an NC-NXS module (if
fitted), a hand-held N-Coder or N-Coder/PC software.
2
3
4
5
6
1
7
Output Power
@8Ω/Ch.
8
F
9
Hi
50W
100W
200W
400W
400W
600W
800W
Address
E
D
A
C
B
2
3
4
5
6
1
7
8
F
9
Lo
E
D
A
C
B
Model
NC-NXS
OR
N-Coder
Data
Port
Crest Audio
Revision 1.03E
+
Daisy Chain
HP-Out LP-Out
Input
–
Input
Signal
N-Coder
To other amplifiers
Power
Processing
Modules
Level
A 3
2
1
0
Level
B 3
2
1
0
Model
NC-MCO
4 5
6
4 5
6
All programmed settings shall be stored in non-volatile EEPROM memory. A barrier strip
input connector shall feed one electronically balanced input. Two removable-knob gain pots
shall be provided that control the level of each amplifier channel independent of programming.
High pass and low pass, loop-thru outputs shall be available on barrier strip connectors.
An internal input sensitivity/voltage gain jumper shall be provided with selections of
0dBu, X20 and X40. The module shall be designated the Crest Audio model NC-MCO.
7
8
9
10
7
8
9
10

BLOCK
DIAGRAM
HF
Out
LF
Out
IN
+
-
G
N-Coder
Data
Port
NC-MCO Input Processing Module
Mono Crossover
HP 1 HP 2
Freq
LP 1 LP 2
Freq Freq
I/F
ckt
ID
ckt
SPECIFICATIONS
Crossover frequencies: 80Hz-8kHz
Input impedance: 50kΩ
Signal-to-noise ratio: 107dB typ.
Common mode rejection: 90dB typ.
Frequency response: 20Hz-20kHz, ± .25dB
Programmable gain range: 0 to -83dB
Voltage gain/input sensitivity: X20 (26 dB)
X40 (32 dB)
or constant sens. for full output at 0dBu (.775V) in
Connectors: Balanced inputs and
unbalanced HP /LP daisy-chain outputs
on barrier strip connectors
with 0.325" (8.3mm) screw center
and 0.270" (6.9mm) lug space,
RJ-14 (‘RJ-11 6-pin’) N-Coder data port
Controls: 2 gain attenuators (w/removable knobs)
v. 2.1 4/7/97
*A3300026*
Freq
Trim
Trim
Atten
Atten
CONTROL OPTIONS
Vosc
Gain
Gain
CH A
CH B
NexSys®
Module Bus
The following NC-MCO parameters can be controlled
by the hand-held N-Coder, N-Coder/PC
software, or via NexSys software.
N-Coder:
Channel attenuation, phase reverse, trim and frequency
for high & low pass
N-Coder/PC software:
Channel attenuation, phase reverse, muting, trim
and frequency for high & low pass
NexSys computer control:
Channel attenuation, phase reverse, solo, muting,
input and output VU metering, trim and frequency
for high & low pass
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. NexSys is a registered trademark of Crest Audio Inc. ©1996 Crest Audio Inc.
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL: 201.909.8700 FAX: 201.909.8744
http://www.crestaudio.com
Printed in USA