NAD CI 940 User Manual
CI 940 Multi-Channel Amplifier
High-performance four-channel amplification for custom installation and distributed
audio systems. With multiple discrete high-power output devices in the component,
it can easily provide instantaneous peak current required for good bass response.
RELIABLE, FLEXIBLE, EASY
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Reliability, flexibility, and ease of installation of the CI 940 is unsurpassed. Its design is
space-efficient and will fit into standard racking units with rack ears and Phoenix speaker
connection blocks. The amplifier is fully protected from short circuit and overheating, and
automatically restores operation after a condition is rectified. The CI 940 is incredibly
flexible, with selectable local or global inputs and the ability to bridge channels to create
a single high-power channel.
EFFICIENT WITH LOW NOISE AND DISTORTION
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Choose between a DC trigger or a signal-sensing turn on with auto shut-off to make
integration easy. The signal sensing circuit employs a sophisticated music sensing circuit
to prevent the false triggers common with noisy source components or other types of
interference noise like RF leakage or ground loops.
FEATURES & DETAILS
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Four channels of clean, low
distortion power set up in two
stereo zone configuration
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35 W x 4 @ 8 Ohms; IHF dynamic power;
peak output current 30A (0.1 Ohm);
90W x 2 @ 80 Ohms in Bridge Mode
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Compact 2U rack height with rack ears
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Phoenix speaker connection blocks
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Detachable power cable for
easy service and upgrades
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Indicator lamps for each zone that show
protection status and amplifier clipping
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<0.5 W standby consumption
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<0.03% THD; <0.04% IMD (SMPTE, CCIR)
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>95dBA referenced to 1W
CI 940 Rear Panel
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Specifications CI 940
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Continuous Output Power
8 Ohms/4 Ohms
8 Ohms Brigde Mode
Rated THD
4 x 35W (ref. rated THD, 20Hz-20Hz, all channels driven)
2 x 70W
≤0.03% (ref. 20Hz-20kHz)
(250mW to rated power, CCIF IMD, DIM 100)
IHF Dynamic Power 8 Ohms
4 Ohms
2 Ohms
Damping Factor
Input Sensativity
Voltage Gain
Frequency Response
55W
85W
95W
>180 (ref. 8 Ohms, 50Hz and 1kHz)
270mV (ref. rated power)
35dB
±0.2dB (ref. 20Hz-20kHz)
-3dB at 3Hz and 100kHz
Signal/Noise Ratio, A-Weighted
>95dBA (ref. 1W)
>110dB (ref. 35W)
Trigger
5-30V In (AC/DC)
-52dBV, 12V Out
Time to Automatic Standby
(without signal at input sense mode)
<10 minutes
GENERAL
Rated Power
Idle Power
Standby Power
Dimensions (W x H x D)*
Net Weight
Shipping Weight
* Gross dimensions include feet, extended buttons and rear panel terminals. ** Non-metric measurements are approximate. NAD Electronics will not assume any liability for errors being made by retailers, custom
installers, cabinet makers, or other end users based on information contained in this document. Note: Installers should allow a minimum clearance of 55mm for wire/ cabl e ma nagement.
270W (120V 60Hz, 230V 50Hz)
<55W
<0.5W
483 x 105 x 323mm (19 1/16 x 4 3/16 x 12 3/4”)**
6.96kg (15.35lb)
8.4kg (18.5lb)
NAD Electronics International reserves the right to change specifications or features without notice. NAD is a registered trademark of NAD Electronics International.
All rights reserved. No part of this publication may be reproduced, stored, or transmitted in any form whatsoever without the written permission of NAD Electronics
International. © 08/16 15-136 NAD Electronics International. www.NADelectronics.com
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