Plinius SA-50 User Manual

Plinius SA-50 instruction manual. Page 1
CONGRATULATIONS on your decision to become the proud owner of the
Plinius SA-50 power amplifier.
This manual has been prepared to help you understand the operation of your amplifier and
to provide some information about its design and the variety of ways it may be used.
We have designed and manufactured this amplifier to faithfully and accurately reproduce
music. This hand built instrument should give a lifetime of pleasure and with a little care
and a full understanding of the operating recommendation in this manual the Plinius SA-50
should provide trouble free performance.
THE PLINIUS SA-50 STEREO POWER AMPLIFIER
PLEASE TAKE TIME TO READ THIS MANUAL THOROUGHLY BEFORE
USING YOUR AMPLIFIER.

Plinius SA-50 Specifications

General

Brand	Plinius
Model	SA-50
Category	Amplifier
Language	English

Summary

Welcome and Introduction

Critical Safety Warnings

Front Panel Controls and Features

Mute Switch Functionality

Controls input signal muting for safe cable changes without powering down.

Mains Power Switch and Indicator

Switches the amplifier ON/OFF; a LED indicates power status.

Bias Switch for Sound Quality and Heat

Selects Class A/B or Class A bias, affecting sound and operating temperature.

Rear Panel Connections Overview

Input Terminal Options

Stereo RCA and XLR Inputs

Connects unbalanced RCA or balanced XLR signals for stereo audio sources.

Mono/Bridged Input Connections

Specifies RCA and XLR inputs for mono or bridged amplifier configurations.

Loudspeaker Output Terminals

Stereo Speaker Output Wiring

Connects loudspeakers to left/right channel positive and negative output terminals.

Bridged/Mono Speaker Output Wiring

Details connecting speakers to specific positive output terminals for bridged mode.

Amplifier Configuration Selector (ACS)

Stereo Mode Operation

Describes the standard stereo setup using both amplifier channels.

Mono Mode Operation

Explains how channels combine for a single, high-power mono output.

RCA Stereo Input Configuration

Using RCA inputs for standard stereo signal sources.

RCA Bridged Mono Configuration

Single unbalanced RCA input for high-power bridged mono operation.

XLR Stereo Input Configuration

Balanced XLR inputs for stereo, offering noise rejection and quality.

XLR Balanced Mono Configuration

Balanced XLR input for premium quality mono/bridged output.

Installation and Environment

Mains Voltage Verification

Ensure the amplifier's voltage rating matches your local power supply.

Optimal Placement and Ventilation

Proper placement for heat dissipation and airflow to prevent overheating.

Mains Power Connection and Fuse

Mains Lead Wiring and Safety

Correct wiring (Earth, Neutral, Live) for the mains power lead is crucial.

Mains Fuse Replacement Guide

Information on the mains fuse rating and safe replacement procedures.

Changing Mains Voltage Configuration

Stereo Connection Guide

Connecting Stereo RCA Inputs

Linking left/right audio outputs from sources to the amplifier's RCA inputs.

Connecting Stereo XLR Inputs

Utilizing balanced XLR inputs for improved signal integrity.

XLR Stereo Input Pin Configuration

Details the pinout for balanced XLR stereo connections.

Loudspeaker Binding Post Usage

Describes the versatile 5-way binding posts for speaker cable termination.

Stereo Loudspeaker Wiring Procedure

Correctly connecting speaker positive and negative terminals to the amplifier.

Ensuring Correct Phasing and Polarity

Importance of correct speaker phasing for optimal stereo sound.

Mono and Bridged Operation Connections

Mono/Bridged RCA Input Setup

Using the right channel RCA input for mono or bridged configurations.

Mono/Bridged XLR Input Setup

Using the right channel XLR input for balanced mono operation.

Configuring RCA for Bridged Mono

Setting the ACS to "RCA BRIDGED MONO" for mono output.

Configuring XLR for Bridged Mono

Setting the ACS to "XLR BALANCED MONO" for premium mono output.

Bridged Mode Speaker Output

How to connect speakers across both channels for bridged mono.

Mono/Bridged Speaker Wiring

Specific positive terminal connections for mono/bridged speaker setup.

Loudspeaker Recommendations

Speaker Compatibility and Impedance

Guidance on selecting suitable loudspeakers and impedance loads for the amplifier.

Understanding Class A Operation

Plinius SA-50 Technical Specifications