Faultfinding Your System | Perreaux SM6 MKII instruction

12 Faultfinding Your System

Cause and

Elimination

of Hum

Hum is a particularly annoying form of noise in any high fidelity system and at some time has been experienced by many of us.

Hum may result from a number of different situations and to make matters worse maybe caused by a seemingly illogical combination of circumstances.

One or more of three specific causes creates hum in the system.

Induced Hum

Hum can be induced into the system from one or more sources and is generally associated with the radiation of noise from one system into another.

Hum and noise can be radiated from any object or system involving AC voltage and current such as power supplies in amplifiers, motors, switching equipment etc. All of these may be found in your hi-fi system or within your own home.

Hum may be induced into any part of the system, so there are no specific instructions that can be given which will offer a guaranteed cure. A good practice to adopt is to keep low-level signal equipment such as phono systems, tuners etc. well away from high-level signal equipment such as power amplifiers. Alternatively, careful designs must be employed to negate these effects on low-level signal equipment. Another good practice to adopt is to keep all signal leads away from power leads.

The practice of neatly tying excess leads together for a tidy looking installation should be resisted, as this could be the cause of induced hum in the system.

Earth Loops

Earth loops are a particularly annoying cause of hum in the system. Earth loops are created by mains frequency current flowing in the screen of signal leads and becomes apparent with the lack of adequate earthing between the various pieces of equipment making up the hi-fi system. This is further compounded by the fact that the equipment earthing considerations vary between different manufacturers and countries.

Perreaux products used with equipment manufactured by other manufacturers may cause an earth loop situation, but Perreaux products used with other Perreaux products will not cause an earth loop situation provided the following precautions are observed:

The entire hi-fi system must be connected to the same mains/line power outlet. This will ensure that each piece of the system shares the same earth or ground. This rule applies to all installations of all brands of equipment. A preamplifier or power amplifier may be operated from an extension cord plugged into the same mains/line outlet.

SM6 MKII specifications

The Perreaux SM6 MKII is an impressive amplifier that encapsulates the essence of high-fidelity audio performance, making it a remarkable choice for discerning audiophiles. Renowned for its robust build quality and sophisticated design, the SM6 MKII promises to deliver an immersive listening experience while showcasing the brand’s commitment to craftsmanship and innovation.

At the heart of the SM6 MKII is a high-power solid-state amplifier circuit that ensures dynamic and accurate sound reproduction. With a power output of 100 watts per channel into 8 ohms, the amplifier can easily drive a wide range of loudspeakers. It is designed to handle the most demanding musical passages without distortion, making it suitable for both loud and nuanced listening environments.

One of the standout features of the SM6 MKII is its dual-mono design, which helps to eliminate crosstalk between the left and right channels. This design philosophy not only enhances stereo imaging but also provides a more immersive soundstage. The amp utilizes a high-performance toroidal transformer, known for its efficiency and minimal electromagnetic interference, further enhancing the clarity of the audio signal.

The SM6 MKII integrates advanced technologies, such as the unique feedback topology that helps minimize distortion and improve signal integrity. This technology ensures that the amplifier remains stable under varying load conditions, providing consistent performance regardless of speaker impedance or volume levels. Additionally, the high-current output stage significantly contributes to its dynamic capabilities, allowing for impressive transient response.

Another characteristic of the SM6 MKII is its user-friendly interface. The amplifier features intuitive knobs and switches that enable easy adjustment of volume, balance, and input selection. The robust chassis construction not only contributes to its aesthetic appeal but also serves to reduce vibration and external interference, ensuring that the audio integrity is preserved.

Overall, the Perreaux SM6 MKII stands out as an excellent investment for those who prioritize audio fidelity and performance. With its powerful output, sophisticated design, and innovative technologies, it is well-equipped to deliver a captivating listening experience that meets the demands of even the most discerning listeners. Whether you're enjoying music in a casual setting or critically listening for nuances, the SM6 MKII provides a sound experience that is both engaging and lifelike.