Plinius Audio SA-103 manual Amplifier Features Front Panel, Mute Switch, Class a Switch

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AMPLIFIER FEATURES – FRONT PANEL

MUTE

CLASS A

FRONT PANEL LAYOUT SHOWING MUTE AND BIAS SWITCHES

MUTE SWITCH

It is not recommended practice to interfere with the input cables while the amplifier is switched on and connected to the loudspeakers, so a Mute button is fitted to interrupt the input signal. This allows you to connect and disconnect the input cables without the necessity of turning the amplifier off.

When the amplifier powers up from start, the Mute automatically closes and has to be switched for normal listening. Press the button once to open the mute, and again to close it. The mute also disconnects the speakers while the LED is on.

CLASS A SWITCH

This switch on the right of the panel alters the operating bias of the amplifier. Press once to activate Class A, and again for Class AB. In Class A the LED is ON. Either mode may be used for listening, with Class A preferred.

CLASS AB: This position reduces the bias on the output stage to operate the amplifier in Class AB. This is a bias configuration used by the majority of high fidelity amplifiers. In Class AB your Plinius SA-103 produces very high quality sound, suitable for all occasions where ‘super critical’ listening is not a priority. The quality of performance in this mode may exceed that of many other amplifiers so a dual benefit exists in that this facility provides the user with a much cooler operating temperature, and a much reduced demand on electricity particularly at idle (while the amplifier is not reproducing music). This unique feature allows you to leave the Plinius SA-103 switched ON at all times, rendering the amplifier ready for use and requiring only a few minutes of warm-up in Class A before the very best of the amplifier's sonic qualities may be experienced.

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Contents Page Serial Number Final Test Certified By Design Philosophy Contents Precautions Amplifier Features Front Panel Mute SwitchClass a Switch Page Amplifier Features Rear Panel Amplifier Configuration Selector ACS Input TerminalsBALANCED/UNBALANCED Signals Output Terminals StereoMains Power Cord IEC Connector Mains SwitchGround Lift Switch Output Terminals BRIDGED/MONOInstallation and Operation Placement and VentilationMains Voltage Connection INPUT/OUTPUT Connection Rear Panel Showing Location of INPUT/OUTPUT TerminalsRCA Stereo RCA Bridged MonoXLR Stereo BI-WIRING XLR Balanced MonoTermination Quality Connecting the Mains Supply Phasing or PolarityError Detection Fuse ProtectionEcologic Control LED Brightness Control MAINS/LINE FuseLoudspeaker Selection WHY Class a is Better Specifications Index Pages 7,20Contact Details

SA-103 specifications

Plinius Audio SA-103 is an exceptional power amplifier designed for audiophiles seeking high-quality sound reproduction combined with robust performance. Renowned for its distinctive warm tone and ability to drive a wide range of speakers, the SA-103 stands out in the realm of high-fidelity audio equipment.

One of the primary features of the SA-103 is its impressive power output. Delivering 100 watts per channel into an 8-ohm load, and doubling that output into 4 ohms, this amplifier can effortlessly drive many speaker types, making it versatile enough for both dynamic home theater setups and demanding stereo listening environments. The amplifier’s dual mono design ensures that each channel operates independently, reducing crosstalk and providing a cleaner soundstage with greater separation between the left and right channels.

The SA-103 utilizes Plinius' unique “Class A biased” architecture, which enhances sound quality by delivering a warm, natural tone. This design minimizes distortion and provides high linearity throughout the amplifier's operating range. The added flexibility of a switchable gain setting allows users to adjust the output to suit their specific system requirements and room acoustics, ensuring optimal performance in various environments.

Another standout characteristic of the SA-103 is its robust construction. Built with high-grade components, including a heavy-duty transformer and custom-designed capacitors, the amplifier boasts durability and longevity. The premium build quality is not just for looks; it also contributes to reducing resonance and vibration, further enhancing audio clarity.

The input stage of the SA-103 features sophisticated circuitry that provides an incredibly low noise floor. This is particularly beneficial for critical listening sessions where high sensitivity is essential. Additionally, the amplifier is equipped with high-quality binding posts and XLR inputs, allowing for secure connections and compatibility with various audio sources.

Heat management is addressed efficiently in the SA-103, utilizing large heatsinks and a cooling architecture that ensures the unit operates smoothly even during extended use. Overall, Plinius Audio SA-103 represents not only an investment in high-performance audio gear but a commitment to delivering a pristine listening experience, characterized by depth, balance, and expressive detail. For anyone serious about audio quality, the SA-103 remains a compelling choice in the power amplifier landscape.
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