Bass and treble tone controls, Volume

540A/640A Integrated amplifier

Bass and treble tone controls

These controls allow subtle adjustments to the tonal balance of the sound. In the central position these controls have no effect. These controls only modify the sound through your loudspeakers and the Pre- Out sockets (where featured), they do not affect the signals sent through the Tape Out connections. With a well produced CD and a good system the tone controls are unnecessary and can be switched out. If the musical recording is of poor quality and/or the loudspeakers/surroundings are lacking it may be necessary to adjust the tone controls to compensate.

Volume

The Volume control increases/decreases the level of the sound from the outputs of the amplifier. This control affects the level of the Loudspeaker output, the pre amp output and the headphone output. It does not affect the Tape Out Connections.

It is advisable to turn the Volume control fully anti-clockwise before switching the amplifier on.

Balance

This control allows you to adjust the relative output levels of the left and right channels. In the central position the output from each channel is equal. This control only modifies the sound through your loudspeakers and the Pre-Out sockets (where featured), it does not affect the signals sent through the Tape Out connections.

Input selection push buttons

Push the appropriate input selection button to select the source component that you wish to listen to. The signal selected is also fed to the Tape Out sockets so that it may be recorded. The input should not be changed whilst recording, although the recorded signal can be checked using the tape input Tape monitor.

Tape monitor selection button

This control lets you listen to the output signal from a tape recorder or signal processor connected to the amplifier's Tape monitor sockets. When Tape monitor is selected, the source component chosen by the input selection push buttons continues to be routed to the Tape Out sockets for recording or processing.

Remote control operation/features

This Amplifier is supplied with a system remote control that operates both this amplifier and the Cambridge Azur CD players. The functions relevant to the amplifier are as follows:

Power - Switches the amplifier between Standby mode and On mode.

Mute - Mutes the audio (indicated by the input LED flashing).

Volume +/- - The volume buttons increase and decrease the Volume of the amplifier output.

Input select - The five input select buttons and the Tape monitor select button are used to change the input source.

540A specifications

Cambridge Audio has established itself as a formidable force in the realm of high-fidelity audio equipment, and the 540A and 640A amplifiers exemplify the company's commitment to delivering exceptional sound quality at a competitive price point. These integrated amplifiers, known for their detailed sound reproduction and robust performance, cater to audiophiles who appreciate both quality and value.

The Cambridge Audio 540A is part of the company's entry-level range, designed for music enthusiasts seeking an affordable yet high-performance amplifier. The 540A boasts a powerful 50 watts per channel output, allowing it to drive a variety of speaker types with ease. The design emphasizes simplicity and user-friendliness, featuring straightforward controls and a sleek finish that fits well in any audio setup.

One of the standout features of the 540A is its dual-mono circuit design. This architecture minimizes crosstalk and signal interference, allowing for a cleaner, more precise sound. It also incorporates high-quality components, including a toroidal transformer, which contributes to improved efficiency and reduced distortion. Additionally, the amplifier features a range of inputs, including multiple line-level options, making it versatile enough to accommodate various audio sources such as CD players, turntables, and streaming devices.

On the other hand, the 640A is an upgrade that builds upon the strengths of the 540A. With a more powerful output of 75 watts per channel, the 640A is designed for users who demand more from their audio systems. This amplifier incorporates an improved power supply and enhanced components, further refining the sound quality. The 640A also introduces features such as a high-quality phono stage, enabling direct connection to turntables without the need for separate equipment.

Both amplifiers incorporate Cambridge Audio's dedication to quality with a focus on analog circuitry. This is particularly evident in the warm, rich sound signature that these amplifiers provide, making them ideal for a range of music genres. The build quality is robust, with a solid chassis designed to reduce vibration and resonance, ensuring a stable platform for audio performance.

In summary, the Cambridge Audio 540A and 640A amplifiers offer a compelling combination of sound quality, versatile connectivity options, and robust design. Whether you are an entry-level audiophile or a seasoned listener looking for an upgrade, these amplifiers provide an engaging listening experience that highlights the nuances and details of your favorite music. With Cambridge Audio's unwavering focus on high-fidelity sound, both models are captivating choices that continue to impress users worldwide.