NAD M4 Analogue Digital Tuner Data Sheet

Masters Series – M4 Analogue/Digital Tuner

The NAD M4 is the most advanced tuner ever developed by NAD. Matching the style, build quality and performance of our award winning Masters

Series components, the M4 performance is at the outer limits of radio broadcast quality. Combining a highly sensitive FM/AM tuning section with the latest digital broadcast technology, the M4 extracts maximum sound quality from every radio format.

PERFORMANCE

Whether listening to an analogue broadcast on the FM or AM bands, or a digital broadcast, the M4 offers the highest levels of interference free reception. In the FM Tuner section a shielded multi-stage MOSFET RF features tuning in 0.0125 MHz steps for accurate tuning and the ability to compensate for multi-path contaminated signals. The M4 features a crystal controlled synthesized phase lock loop with IF counter for accurate VCO tuning, and a two stage loop filter for PLL output. In addition, the oscillator to synthesizer stage is buffered to keep spurious responses extremely well suppressed. Excellent sensitivity combined with high overload margins result in good station pulling power and clear reception, even in urban areas. Excellent selectivity and capture ratio allow clear reception of all stations on the often crowded FM dial. The IF stage features three ceramic filter stages for low distortion and excellent channel separation. Sound quality is not overlooked, with a double tuned FM detector for low distortion and frequency response correction and MPX filter to give improved audio frequency response without sacrificing MPX rejection.

AM performance, while never able to achieve the low noise and distortion of FM broadcasting, is never-the-less highly sensitive with noise levels well suppressed. More importantly, it sounds open and dynamic.

Digital Audio Broadcast combines noise-free performance with an unprecedented selection of stations. Since DAB uses audio compression

(MP2) to maximize station selection, it is critical that the decoding and conversion to analog be as accurate as possible. Operating at a 48kHz sampling rate and 24 bit word length, DAB broadcasts have low distortion and wide dynamic range. The M4 excels at extracting the maximum sound quality from digital broadcast using premium quality devices and advance circuit design in the digital and analogue stage.

SIMPLICITY

By combining all broadcast formats in one elegant component the M4 is the perfect way to add radio to a Masters Series stereo or surround sound system. Auto tuning finds all the stations available in your locale and the station preset memory allows you to save your favourites for fast and easy recall. These can be accessed from the front panel or via the supplied IR remote control. Additionally, an RS-232 port, IR input and 12V trigger allow

- 40 Preset Station Memory

- RDS function displays Station ID and Radio

Text from broadcast compliant stations

- FM Mute eliminates inter-station tuning noise

- FM Blend reduces noise of distant or

“fringe” stations by reducing high frequency separation

- High sensitivity AM tuner

- Supports DAB Band III and L Band (230V version)

- XM Ready input for external XM Satellite module (120V version)

- Audiophile quality Burr Brown Digital to

Analogue converters

- Audio specific Burr Brown OP Amps

- Separate power supplies for Digital Control and Audio stages

- RS-232 port interfaces with external control systems (Crestron and AMX certified)

- Rear panel IR Input allows easy interface to external IR sensors

- NAD Build Artistry construction

- M4 Remote Control

the M4 to be fully integrated with advanced automated control systems.

The clear two line dot matrix display shows information about the broadcasts being received, which may include station ID and song and artist information.

VALUE

Compared with other tuners of similar performance and capability the M4 stands apart for its superb style, build quality and affordable price.

230V Version Only

Specifications

FM Tuner Section

Tuning Range (0.0125MHz steps)

Usable Sensitivity

Signal/Noise Ratio

Mono

Stereo

Frequency Response (20 Hz - 15 kHz)

Channel Separation

30 Hz

1 kHz

10 kHz

Capture Ratio

AM Suppression

Image Rejection

I.F. Rejection

Pilot Suppression

AM Tuner Section

Tuning Range

North America (10kHz steps)

Europe (9kHz steps)

Usable Sensitivity

S/N Ratio

Total Harmonic Distortion

IF Rejection

Image Rejection

Selectivity

Loop Sensitivity

999 /1000 kHz

603/600 kHz

1404/1400 kHz

Frequency response

Audio Output

87.5MHz - 108.5MHz

13 dBμ

72 dB

66 dB

±1.0 dB

33 dB

42 dB

32 dB

3 dB

65 dB

85 dB

78 dB

60 dB

530kHz - 1710Mhz

531kHz - 1602Mhz

30dBμ

38dB

3%

36dB

28dB

17dB

66dB

66dB

66dB

±6 DB

130 mV ±20mV

DAB Tuner Section - Band III

Tuning Range

Maximum input signal

Usable Sensitivity

Far-off Selectivity

Adjacent Channel rejection

Total Harmonic Distortion

S/N Ratio

Frequency Response

Sampling Frequency

DAB Tuner Section - Band L

Tuning Range

Maximum input signal

Usable Sensitivity

Far-off Selectivity

Adjacent Channel rejection

Total Harmonic Distortion

S/N Ratio

Frequency Response

Sampling Frequency

Physical Specifications

Net Dimensions (W x H x D)

Gross Dimensions*

Net Weight

Shipping Weight

174MHz – 240MHz

-10 dBm

-100dBm typical

40dB

40dB

0.01%

100dB

±0.3dB

48kHz

1452 - 1492MHz

-16 dBm

-97dBm typical

40dB

40dB

0.01%

100dB

0.3dB

48kHz

17 1/8 x 3 7/8 x 11 4/5”

(435 x 100 x 300mm)

17 1/8 x 4 1/2 x 12 1/4”

(435 x 115 x 312mm)

19.75 lbs (8.97kg)

31.5 lbs (14.3kg)

*includes volume knob, speaker terminals, connectors

& feet. Note: Installers should allow a minimum clearance of 4 inches for wire management.

NAD Electronics International reserves the right to change specifications or features without notice as design improvements are incorporated. 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 written permission of NAD Electronics. International. Printed in Canada 12/07. www.NADelectronics.com