SAFETY PRECAUTIONS

Checking the power supply rating

For your own safety please read the following instructions carefully before attempting to connect this unit to the mains.

Check that the rear of your unit indicates the correct supply voltage. If your mains supply voltage is different, consult your dealer.

This unit is designed to operate only on the supply voltage and type that is indicated on the rear panel of the unit. Connecting to other power sources may damage the unit.

This equipment must be switched off when not in use and must not be used unless correctly earthed. To reduce the risk of electric shock, do not remove the unit's cover (or back). There are no user serviceable parts inside. Refer servicing to qualified service personnel. If the power cord is fitted with a moulded mains plug the unit must not be used if the plastic fuse carrier is not in place. Should you lose the fuse carrier the correct part must be reordered from your Cambridge Audio dealer.

The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated 'dangerous voltage' within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the service literature relevant to this appliance.

This product complies with European Low Voltage (73/23/EEC) and Electromagnetic Compatibility (89/336/EEC) Directives when used and installed according to this instruction manual. For continued compliance only Cambridge Audio accessories should be used with this product and servicing must be referred to qualified service personnel.

Plug fitting instructions (UK only)

The cord supplied with this appliance is factory fitted with a 13A mains plug fitted with a 3A fuse inside. If it is necessary to change the fuse, it is important that a 3A one is used. If the plug needs to be changed because it is not suitable for your socket, or becomes damaged, it should be cut off and an appropriate plug fitted following the wiring instructions below. The plug must then be disposed of safely, as insertion into a 13A socket is likely to cause an electrical hazard. Should it be necessary to fit a 3-pin BS mains plug to the power cord the wires should be fitted as shown in this diagram. The colours of the wires in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug. Connect them as follows:-

The wire which is coloured BLUE must be connected to the terminal which is marked with the letter 'N' or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal which is marked with the letter 'L' or coloured RED

The wire which is coloured GREEN/YELLOW must be connected to the terminal which is marked with the letter 'E' or coloured

GREEN.

If your model does not have an earth wire, then disregard this instruction.

If a 13 Amp (BS 1363) plug is used, a 3 Amp fuse must be fitted, or if any other type of plug is used a 3 Amp or 5 Amp fuse must be fitted, either in the plug or adaptor, or on the distribution board.

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Cambridge Audio 640C user manual Safety Precautions, Checking the power supply rating, Plug fitting instructions UK only
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640C specifications

Cambridge Audio has long been known for producing high-quality audio products, and the 640C CD player exemplifies this commitment to excellence. First introduced in the early 2000s, the 640C garnered significant acclaim for its exceptional sound performance and robust build quality, making it a favorite among audiophiles and music enthusiasts.

At the heart of the 640C is its proprietary digital-to-analog converter (DAC). This DAC is key in delivering the rich, detailed sound that Cambridge Audio is renowned for. The 640C uses a high-quality Wolfson DAC, which is specifically designed to minimize distortion and maximize clarity, allowing listeners to fully appreciate the nuances in their music. This, combined with the player’s well-designed analog output stage, ensures that the sound produced is both informative and engaging.

One notable feature of the 640C is its dual-wolfson DAC architecture. This design allows the player to process both channels separately, significantly enhancing the stereo imaging and depth of sound. Coupled with a low-jitter clock, the player achieves precise timing, thus enhancing the overall resolution of the audio output. Users can expect crisp highs, detailed mids, and firm bass, which contribute to a balanced and natural sound profile.

Another technology that sets the 640C apart is its excellent build quality. Constructed with a solid metal chassis, the player is designed to minimize vibrations that can interfere with audio playback. The internal components are carefully mounted and shielded to further reduce interference and noise, ensuring that the audio signal remains pristine.

The 640C also features a user-friendly interface, with an intuitive remote control that allows easy navigation through CDs and track listings. The player is compatible with various disc formats, including standard audio CDs, CD-Rs, and CD-RWs, making it versatile for handling different media. The inclusion of a digital output enables users to connect the player to external DACs or digital audio systems, enhancing flexibility in audio setups.

In summary, the Cambridge Audio 640C CD player blends high-fidelity sound reproduction with thoughtful engineering and robust construction. Its dual-wolfson DAC setup and low-jitter technology provide exceptional audio quality, while its user-friendly design ensures easy operation. For those seeking a reliable, high-performance CD player, the 640C continues to stand out as a timeless choice in the expansive world of audio equipment.
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