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NAD C 427

Stereo AM FM Tuner

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NAD C 427 Details

NAD C 427: Stereo AM FM Tuner

  • RDS PS (Station name) and RT (Radio text)
  • 40 Station random presets (AM or FM)
  • 24 position rotary encoder knob for quick station tuning and preset selection
  • 4-Line VFL graphic display
  • MOS-FET RF Front End
  • Auto Search for optimized tuning
  • Blend narrows stereo separation and improves noise
  • FM Mute eliminates inter-station tuning noise
  • RS-232, IR and 12V Trigger Inputs for advanced control system integration
  • NAD Full Function Remote Control
  • <0.5W Standby power consumption

FM is still one of the most reliable and best sounding mediums for hassle-free music listening. The C 427 from NAD is built on the strengths of previous NAD tuners by offering a quality of reception that is as good as, or better than, the quality of today’s broadcasts. NAD has carried forward their highly sensitive RF Front End for cleaner reception in fringe areas, plus extremely low noise across the audio spectrum. In line with NAD’s environmental policy, the power supply is completely redesigned for improved efficiency and ultra-low power consumption during standby while still allowing all remote activation and control interfaces. The rear panel IR Input, and RS-232 port, allows the C 427 to be easily integrated with sophisticated system controllers used in custom installation. It also has one of the most intuitive user interfaces in the market utilizing a 24-position rotary encoder knob to more quickly tune stations or select preset stations. All functions are available via the included IR Remote Control.

Loads of Presets
With 40 presets available, you can store all your favorite radio stations. These presets can be any combination of AM and FM stations: 30 presets for FM and 10 for AM, or 25 for FM and 15 for AM, for instance. In order to avoid scrolling through 40 presets, the C 427 skips any that have not been programmed (left empty), so you can quickly access your favorite stations.

Simply Convenient
Instead of crowding the front panel with buttons and features that are hardly ever used, the C 427 focuses on convenience in daily operation. The RDS limits itself to the RDS PS and RT function, both of which enhance ease of operation. The RDS PS (Program Service) will automatically indicate the name of the radio station on the display, e.g., "BBC R1", so you will know exactly what station you are listening to. With its four-line graphic display, you will also see all the available information. Preset information is stored in the C 427’s non-volatile memory, which means it will remember all of its preset information even if the unit has been unplugged for a long time.

Great Reception
Auto Search automatically stops at the next strong radio signal it comes across and optimizes tuning. Weaker radio stations can be tuned into manually. Stations that are quiet in Mono but noisy in Stereo can benefit from the “Blend” feature that narrows stereo separation and improves noise. FM Mute eliminates inter-station tuning noise and only lets strong and clear stations to emerge from the silent background. Even though AM can never reach the quality of any FM transmission, the C 427’s AM section retains excellent clarity together with lowest possible background noise.

Performance Driven
In addition to its ease-of-use, the NAD C 427 also offers features to get the maximum out of the airwaves. The MOS-FET RF Front End design together with high quality components and careful PCB layout guarantees excellent sensitivity with low inter-modulation distortion to provide quiet and musically satisfying performance.

Overall the C 427offers excellent performance, ease of use or the convenience of RDS, with the value to high performance ratio for which NAD is so renowned.

Additional Information

Name NAD C 427
Sub Title Stereo AM FM Tuner
Manufacturer NAD
Manufacturer Part# C427

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NAD C 427


  • Usable Sensitivity (98MHz) : 10dBμV
  • Signal/Noise Ratio :
    • 65dB (60dBμV IHF-WTD Mono)
    • 60dB (60dBμV IHF-WTD Stereo)
  • Frequency Response : ±1.5dB (20Hz - 15kHz, 60dBμV)
  • Channel Separation (60dBμV) :
    • 30Hz : 33dB
    • 1kHz : 40dB
    • 10kHz : 32dB
  • Capture Ratio (40dBμV) : 3dB
  • AM Suppression : 50dB (60dBμV, 100% Mod. FM, 30% Mod. AM)
  • Image Rejection (119.4MHz) : 70dB
  • I.F. Rejection (10.7MHz) : 70dB
  • Pilot Suppression (60dBμV) : 60dB
  • Total Harmonic Distortion* :
    • Mono : 0.4%
    • Stereo : 0.8%
  • Auto Search Sensitivity : 24dBμV
  • RDS Decode Sensitivity : 26dBμV


  • Usable Sensitivity (999/1000 kHz) : 55dBμV
  • Signal/Noise Ratio (5mV in) : 42dB
  • Total Harmonic Distortion (5mV in) : 1.5%
  • IF Rejection (450kHz) : 40dB
  • Image Rejection (F+2xIF) : 28dB
  • Selectivity : 20dB
  • Loop Sensitivity (20dB S/N) :
    • 999/1000Hz : 66dB
    • 603/300Hz : 66dB
    • 1404/1400Hz : 66dB
  • Frequency Response (100 - 2.3kHz, 5mV) : ±6dB


  • Standby power : <0.5W
  • Unit Dimension (W x H x D) - Gross :
    • 435 x 99 x 315mm
    • 17 1/8 x 3 15/16 x 12 7/16"
  • Net weight : 4.6 kg (10.1 lb)
  • Shipping weight : 5.4 kg (11.9 lb)