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Summary of Contents for Plinius SA-103
- Page 2 We have designed and manufactured this amplifier to reproduce faithfully and accurately, your favourite music. With a little care and a full understanding of the operating recommendations in this manual, your Plinius SA-103 Power Amplifier will provide years of high-quality, trouble-free performance. Serial Number: Final Test Certified By: ...
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Page 3: Design Philosophy
DESIGN PHILOSOPHY From a distance you can see that the design of the Plinius products is more than an applied styling exercise to the front panel. We have started from the ground up to produce a casing for our electronics that is unrivalled in its physical strength and visual simplicity. -
Page 4: Table Of Contents
Installation and Operation ... Page 12 Input/Output Connection ... Page 13 RCA Connection ... Page 14 XLR Connection ... Page 15 SA-103 Features ... Page 17 Loudspeaker Selection ... Page 19 Why Class A is better ... Page 20 Specifications ... Page 21 Index ... -
Page 5: Precautions
Please take special note of the following precautions before operating your new amplifier: • The Plinius SA-103 Power Amplifier can be operated in mono mode delivering up to 460 watts into 8 ohms. This amplifier is also capable of a very large peak current delivery. -
Page 6: Amplifier Features - Front Panel
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. - Page 7 CLASS A: This position provides Class A bias to the output stage therefore ensuring the optimum performance of the amplifier during all listening events. Class A amplifiers run hotter than Class AB amplifiers, hence our specially designed and distinctive heat sinks. Operating the amplifier in Class A necessitates two precautions that should be observed.
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Page 8: Amplifier Features - Rear Panel
Please remember that your Plinius SA-103 Power Amplifier is a high quality electronic instrument capable of an exceptional level of performance. Be sure that you understand your system’s requirements fully before you make any connection to this amplifier or adjust the ACS (Amplifier Configuration Selector). -
Page 9: Input Terminals
INPUT TERMINALS Input terminals for your Plinius SA-103 Power Amplifier are easily accessible and fitted to the top centre area of the rear panel. A brief summary of connection possibilities is listed below, while a more detailed explanation follows later in this instruction manual. -
Page 10: Balanced/Unbalanced Signals
(hum). XLR BALANCED MONO: In this mode both channels of your Plinius SA-103 combine to operate as a true balanced mono amplifier, from input to output. This configuration provides the highest quality mono performance from a balanced line input connected to the RIGHT BALANCED XLR INPUT. -
Page 11: Mains Switch
By connecting a processor with a remote trigger signal to these terminals, the SA-103 can be put in and out of Class AB/mute by the processor to which it is connected. When in Class AB/mute the amplifier draws less current and will operate at minimum temperature. The output relays are also open, disconnecting the loudspeakers. -
Page 12: Installation And Operation
PLACEMENT AND VENTILATION Your Plinius SA-103 is designed to operate at a moderately high temperature, even more so when used in Class A. The ideal location is on a rigid stand or floor mounted away from direct contact with any temperature sensitive materials or deep pile carpets. -
Page 13: Input/Output Connection
NPUT RCA STEREO RCA BRIDGED MONO ANEL It is important that you connect your loudspeakers (outputs) and preamplifier (inputs) to the Plinius SA- 103 Power Amplifier correctly to ensure the amplifier is not damaged, and sounds it’s best with your system. -
Page 14: Rca Connection
RCA STEREO Connect your preamplifier or input signal to the two RCA inputs at the top of the amplifier back panel. Make sure you connect the red coded cable to the red RIGHT RCA input and the black (or white) cable to the black LEFT RCA input. -
Page 15: Xlr Connection
Bi-wiring uses two pairs of loudspeaker cables for each channel loudspeaker. You will notice that the rear panel of your Plinius SA-103 has two pairs of output terminals for this purpose. When using bi-wires in a STEREO installation, connect each wire pair to a corresponding pair of binding posts (one cable to the top pair, one cable to the bottom) paying special attention to positive (+) red and negative (-) black polarity. -
Page 16: Connecting The Mains Supply
The power LED will pulse for ten seconds as the internal microprocessor and soft start circuitry allow the amplifier internal voltages to settle. Once the amplifier is at full voltage the power LED will stay lit, and the amplifier will be in mute. Press the mute switch to enjoy your new Plinius SA-103 Power Amplifier. -
Page 17: Sa-103 Features
ECOLOGIC CONTROL The Plinius SA-103 is also fitted with a microprocessor which monitors and performs the Bias and Mute functions. It is programmed to switch the amplifier back into Class AB if no signal has been present at the input for a predetermined time. -
Page 18: Led Brightness Control
LED BRIGHTNESS CONTROL Your Plinius SA-103 has an internal LED brightness control that will adjust all three front panel LED’s. A small flat bladed screwdriver can be used to adjust the brightness. The LED brightness control is a small multi turn potentiometer and is located on the front of the main circuit board within the top cavity of the amplifier, and is labelled VR3. -
Page 19: Loudspeaker Selection
OUDSPEAKER ELECTION Your Plinius SA-103 Power Amplifier is designed for use with high fidelity loudspeakers. It should not be used to operate any other type of appliance or equipment. Choice of loudspeakers is one of personal taste, providing the chosen loudspeakers are suitable for use with your amplifier. -
Page 20: Why Classa I Sbetter
LASS ETTER Class A has always been regarded as the perfect operating mode for audio amplifiers. Many leading amplifier designers and manufacturers world wide recognise that a well designed Class A circuit has inherently lower distortion than any other design. Class A circuit topology is one in which the total current the amplifier is capable of delivering, is kept flowing in the circuit regardless of demand. -
Page 21: Specifications
125-WATTS RMS PER CHANNEL INTO 8 OHMS. BOTH CHANNELS DRIVEN FROM 20Hz TO 20kHz. RIDGED ALANCED UTPUT : 20Hz to 20kHz ±0.2dB. -3dB at 5Hz and -3dB at 70kHz. REQUENCY ESPONSE : Typically <0.05% THD at rated power. 0.1% THD and IM worst case prior to clipping. ISTORTION : 140 Watts per channel or greater into 8Ω. -
Page 22: Index
NDEX ACS (Amplifier Configuration Selector) ... Page 9 Balanced Signal ... Page 10 Bias Class A ...Pages 7,20 Bias Class AB ... Page 7 Bias Switch... Page 7 Bi-wiring ... Page 15 Date of Manufacture ... Page 3 Ecologic Control ... Page 17 Error Detection... -
Page 23: Contact Details
For further product information or queries, please contact us at the address below. PLINIUS products are designed and manufactured by: Plinius Audio Ltd. P.O. Box 1836 Palmerston North New Zealand Phone: 64 6 354 8583 Facsimile: 64 6 354 8586 Email: info@pliniusaudio.com Internet: www.pliniusaudio.com ONTACT ETAILS ©2005 Plinius Audio Ltd.
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