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NAD CI 940

Multi-Channel Amplifier

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NAD CI 940 Details

NAD CI 940: Multi-Channel Amplifier

  • 4 x 35W @ 8/4 Ohms all channels driven
  • IHF Dynamic Power:
    • - 8 Ohms 55W
    • - 4 Ohms 85W
    • - 2 Ohms 100W
  • <0.03% THD/IM distortion
  • Adjacent channels can be brigded to 100W @ 8 Ohms
  • Three power modes: Trigger (5V – 30V, AC or DC), Auto Sense, Front Panel Switch
  • Independent level controls for each channel
  • Thermostatic forced air cooling
  • Detachable 1.8 meter power cord
  • Rack Mount Ears included
  • 2U rack space

NAD CI 940 represents a new generation of high performance amplification for custom installation and distributed audio systems. Like many award-winning NAD amplifiers before it, the CI 940 is designed by Engineer Emeritus, Bjørn Erik Edvardsen. The CI 940 is capable of easily providing the instantaneous peak current required for good bass response by utilizing multiple discrete high power output devices. The power supply features a custom toroidal transformer that maintains very low impedance for lowest noise and good damping factor.

Power and Performance
The CI 940 features 4 channels of clean low distortion power set up in a 2 stereo zone configuration. Boasting 35 watts of continuous power per channel, the CI 940 can drive low impedance speakers and long wire runs. Vanishingly low distortion and nearly absent noise allow the music to emerge from a 'black' background that enhances stereo perspective and allows the subtle details of the music to be heard clearly. Generous dynamic power provides music a relaxed yet lively quality.

Reliable, Flexible, Easy
Reliability, flexibility, and ease of installation of the CI 940 is unsurpassed. It has a very space-efficient design 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
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.

Award-winning Sonics
When it comes to sound, NAD is in the top tier of all amplifier brands, consistently winning awards for both performance and value for money. The CI 940 offers warm, expansive and intensely musical sound, designed to drive real world speaker loads, not just simple laboratory test loads. The CI 940 brings out the best performance from any speaker for a remarkable listening experience. It is also extremely quiet with inaudible residual noise in no signal conditions, important when using efficient speakers in small spaces. Energy efficiency of CI 940 is also impressive with <0.5W standby consumption and highly efficient power delivery. Musical, practical, efficient and reliable, the CI 940 is everything you could wish for high quality distributed audio.

Additional Information

Name NAD CI 940
Sub Title Multi-Channel Amplifier
Manufacturer NAD
Manufacturer Part# CI940

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NAD CI 940


  • Continuous Output Power :
    • 8 Ohms/4 Ohms : 4 x 35W (ref. rated THD, 20Hz-20Hz, all channels driven)
    • 8 Ohms Brigde Mode : 2 x 70W
  • Rated THD (250mW to rated power, CCIF IMD, DIM 100) : ≤ 0.03% (ref. 20Hz-20kHz)
  • IHF Dynamic Power :
    • 8 Ohms : 55W
    • 4 Ohms : 85W
    • 2 Ohms : 95W
  • Damping Factor : >180 (ref. 8 ohms, 50Hz and 1 kHz)
  • Input Sensitivity : 270mV (ref. rated power)
  • Voltage Gain : 35dB
  • Frequency Response :
    • ±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


  • Rated Power : 270W (120V 60Hz, 230V 50Hz)
  • Idle Power : <55W
  • Standby Power : <0.5W
  • Dimensions (W x H x D) : 483 x 105 x 323mm (19 1/16 x 4 3/16 x 12 ¾")
  • Net Weight : 6.96 kg (15.35 lb)
  • Shipping Weight : 8.4 kg (18.5 lb)