Protection System, DC offset protection

PROTECTION SYSTEM

The Azur 340A protection system comprises of:

Overload and Short-Circuit Protection

The Azur 340A is fully protected against excessively low load impedances, taking into account the fact that a reactive load puts much more severe demands on a amplifier stage than a pure resistor.

The overload and short-circuit protection systems continuously monitor the voltage, current and temperature conditions of each of the output devices, and comparing them with the defined Safe Operating Area or SOA. This sophisticated system allows the protection to act positively in case of genuine necessity, but without false triggering.

Over temperature detection

The instantaneous temperatures of the output devices of the Azur 340A are continuously monitored to ensure that junction temperatures do not get dangerously high. When an overtemperature condition occurs, the output is muted until the devices cool. The operation is carefully controlled to minimise the exposure of the output devices to wide temperature variations, which can impair reliability by thermal cycling. This is accomplished by making the muting periods relatively short, so the amplifier appears to be turning on and off. This puts the least stress on the output devices.

Careful definition of the protection parameters ensures that the 340A is not subject to nuisance tripping, but only closes down when the need is real. Typically this can only happen if the ventilation openings of the amplifier are obstructed while low-impedance speakers are driven at a high level for extended periods.

DC offset protection

The DC offset protection system immediately isolates the amplifier from the loudspeakers by positively opening an output relay, in the unlikely event of an amplifier error. Errors of either polarity on both channels are detected.

Voltage clamping

When rapid transients are applied to reactive loads in extreme circumstances, flyback pulses can be generated which are larger than the amplifier supply rail voltages and have the potential to cause harm to the output devices. The Azur 340A has a comprehensive voltage clamping system that ensures that such pulses are safely absorbed by the amplifier and no damage can result.

12azur integrated amplifier

340A specifications

The Cambridge Audio 340A is a well-regarded integrated amplifier that captures the essence of high-fidelity sound, appealing to both audiophiles and casual listeners alike. This amplifier is a part of the popular Azur series, which is known for its combination of premium quality and affordability.

One of the standout features of the Cambridge Audio 340A is its power output. With 50 watts per channel into 8 ohms, it is capable of driving a wide range of speakers, ensuring a dynamic audio experience across various genres of music. The amplifier’s low distortion levels contribute to clear and articulate sound reproduction, making it an ideal choice for those who prioritize audio clarity.

The 340A incorporates advanced audio technologies, including a toroidal transformer, which aids in minimizing electrical noise and improving overall efficiency. This transformer design not only enhances the amplifier's performance but also contributes to a more compact and manageable unit, allowing for easy integration into any audio setup.

Another notable characteristic is the extensive connectivity options offered by the 340A. It features multiple line-level inputs, allowing users to connect various sources such as CD players, turntables, and streaming devices seamlessly. Additionally, it includes a dedicated phono stage, making it particularly appealing to vinyl enthusiasts who desire high-quality sound from their record collections.

The design of the Cambridge Audio 340A is both functional and elegant, with a minimalist front panel that includes a volume knob, input selector, and an LED power indicator. Its rugged build quality ensures durability, while its stylish appearance blends well with modern audio equipment.

The amplifier also includes tone controls that allow users to adjust bass and treble levels according to their personal preferences. This feature adds an extra layer of customization, enabling listeners to tailor the sound to their liking based on their listening environment.

In summary, the Cambridge Audio 340A is a versatile and high-performing integrated amplifier that boasts a powerful output, excellent sound quality, advanced technologies, and a user-friendly design. Its combination of features makes it an outstanding choice for anyone looking to enhance their audio experience without breaking the bank.