Perreaux Prisma 350 owner manual Power Mosfet

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The Power MOSFET

The MOSFET

Other Field

Effect

Devices

Today with the vast number of technical achievements occurring around the world, many discoveries are overshadowed or obscured by some that may appear more important to the general media. One such discovery of importance, to the audiophile at least, is that of the power MOSFET device.

The field effect transistor (FET) and then the MOSFET transistor have been around for a number of years, but only as a small signal-handling device, mostly employed in radio tuners and communications equipment. The electrical advantages of these have long been realised by manufacturers of hi-fi. If only they could be made to handle large amounts of power – what a benefit to the audiophile.

The term power MOSFET describes a device capable of handling reasonably large amounts of electrical energy as an amplifier itself – hence power. MOSFET stands for “Metal Oxide Silicon Field Effect Transistor”, this in turn means that the device is constructed of Silicon. Similar to a transistor – but the part that controls the power flow through the device is insulated from the remainder of the device by a metal oxide insulating layer and the controlling of the power is achieved by the development of an electrostatic field between the controlling element and the conducting element.

In a transistor, the control of the power through the device is effected by the application of a smaller, but nevertheless, significant amount of power to the controlling element. Whereas in the power MOSFET, the control of the power through the device is affected by the application of a very small and very insignificant amount of power to the controlling element – in fact, only the amount required to create a small electrostatic field. This makes the operation of a power MOSFET similar to that of a valve.

There are basically three types of power field effect device, they are: the junction FET, the vertical FET and the power MOSFET, all of which were independently developed by three different hi-fi equipment manufacturers in Japan and all were major technological breakthroughs in their own right.

The first of these was the junction FET, the second the vertical FET and lastly, the power MOSFET. Although all these devices are vast improvements over power transistors, the junction FET and vertical FET cannot compare with the power MOSFET, in terms of simplicity of the supporting driver stages and power supply requirements.

The power MOSFET, though having similar characteristics to the valve, can be divided into 2 types of polarities of device – P-channel and N-channel. Broadly speaking only one of these types exists in valve operations. This means that complementary power MOSFETs – P and N channel – can be used in an audio output stage providing greater linearity of operation than can be achieved with valves. In addition, further advantages over the valve include

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Contents Prisma Page Introducing the Perreaux 350 Power Amplifier Ii Important Safety Instructions Page Table of Contents IiiUnpacking and Placement Ventilation Requirements Instant Install Congratulations Front Panel Functions Rear Panel Functions Fuse Rating Master Trigger Input Balanced Inputs Special Design Philosophies Minimalism in a Wider Context Special Design Features DC Offset Protection Maximising System Potential Watts is twice as loud as 35 Watts, not ten times as loud Power Mosfet Audio Applications Secondary Breakdown High Frequency Response Other Advantages Care and Maintenance Warranty Information Obtaining ServiceExtended Warranty Registration FormFaultfinding Your System Identifying Isolating Problems Loudspeakers Preamplifier Faultfinding Flowchart 13Specifications 600WRMS into 4SDimensions Voltage Gain 30.7dB Physical Dimensions Contact Details Installation Notes

Prisma 350 specifications

The Perreaux Prisma 350 is an innovative and sophisticated integrated amplifier designed to elevate the listening experience for audiophiles and music enthusiasts alike. Renowned for its robust construction and exceptional audio quality, the Prisma 350 stands out as a versatile piece of equipment in the world of high-fidelity sound systems.

One of the key features of the Prisma 350 is its impressive power output. With a strong performance of 175 watts per channel into 8 ohms, it is capable of driving a wide range of speakers, making it highly adaptable to various listening environments. This level of power ensures that music is delivered with clarity and authority, resulting in a rich and immersive listening experience.

The Prisma 350 utilizes advanced Class A/B amplification technology. This design offers the best of both worlds, delivering the warmth and detail often associated with Class A amplifiers while maintaining the efficiency and power of Class B designs. This combination allows the Prisma 350 to reproduce music with accuracy, ensuring that even the most subtle nuances in recordings are faithfully rendered.

In terms of connectivity, the Prisma 350 boasts a comprehensive array of input options. It includes multiple RCA, balanced XLR inputs, and a built-in phono stage for vinyl enthusiasts. Additionally, it features digital inputs such as USB, optical, and coaxial, ensuring seamless integration with modern digital sources. The inclusion of Bluetooth capability further enhances its versatility, allowing for effortless streaming from mobile devices.

Another noteworthy characteristic of the Prisma 350 is its user-friendly interface. The amplifier is equipped with a clear, intuitive display along with a well-designed remote control, making it easy to navigate settings and adjust sound preferences. The integrated DAC (digital-to-analog converter) elevates digital audio quality, ensuring that even high-resolution files are played back with precision.

Constructed with robust materials, the Perreaux Prisma 350 not only looks elegant but is also built to last. Its heat management system ensures optimal performance without overheating, providing peace of mind during extended listening sessions.

In summary, the Perreaux Prisma 350 is a high-performance amplifier that combines power, versatility, and advanced technology to create an exceptional audio experience. With its rich feature set, attention to detail, and superior build quality, the Prisma 350 is an excellent choice for those seeking to enhance their musical enjoyment at home.
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