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The heart of music

www.pliniusaudio.com

SA-103

Power Amplifier
Instruction Manual

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Summary of Contents for SA-103

Page 1: ...The heart of music www pliniusaudio com SA 103 Power Amplifier Instruction Manual ...

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Page 3: ...ration 11 SA 103 Features 16 Loudspeaker Selection 18 Specifications 19 Index 20 All operational technical and descriptive material in this publication is subject to change at any time without notice For further product information or queries please contact your Plinius dealer PLINIUS products are designed and manufactured by Plinius Audio Limited New Zealand www pliniusaudio com ...

Page 4: ...riety of ways it may be used 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 IMPORTANT PLEASE TAKE THE TIME TO RE...

Page 5: ... hydraulically formed corners on the amplifiers giving much greater strength and the one piece housing for the remote control that looks feels and genuinely is robust As with music that you are not familiar with truly innovative new designs can take time to understand and enjoy How often have you heard music that you were first unsure of that over repeated listening has become a firm favourite Our...

Page 6: ...upon a rigid stand or floor mounted away from direct contact with any temperature sensitive materials furniture or deep pile carpets Ventilation through and around the amplifier should also be kept unimpeded Please ensure that the heat vents slots in the lid and base and the heatsink fins on either side are not covered or restricted in any way The PLINIUS SA 103 design incorporates a very high lev...

Page 7: ...ring removal of the lid or base of this amplifier must be referred to a suitably qualified and experienced service technician DO NOT attempt to connect any input of this amplifier to it s own outputs DO NOT earth any output terminal or connect any of these terminals together without following the instructions in this manual or seeking qualified assistance DO NOT place this amplifier in any positio...

Page 8: ...er off When the amplifier powers up from start it will automatically go into Mute and disconnect the speaker outputs In this mode the Mute LED is ON Press the Mute switch to take the unit out of Mute and begin listening 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 Eithe...

Page 9: ... the mains supply in Class A is approximately 500 watts similar to a small electric heater The amplifier should not be connected to a wall outlet that is shared with other heavy current appliances such as heaters or electric motors If in doubt check with your Plinius dealer for advice WHY CLASS A IS BETTER Class A has always been regarded as the perfect operating mode for audio amplifiers Many lea...

Page 10: ... rear panel layout INPUT TERMINALS Input terminals for your Plinius SA 103 Power Amplifier are easily accessible and fitted near the top centre area of the rear panel RCA INPUTS These standard RCA terminals are for use with unbalanced signals from most signal sources such as audio preamplifiers XLR BALANCED INPUTS XLR connectors fitted to this amplifier are for use with balanced line signals from ...

Page 11: ... stereo or mono output The ACS switch options are RCA STEREO This option provides a stereo output via both left and right output channels from a stereo signal connected to both left and right input RCA inputs RCA BRIDGED MONO This option configures your amplifier to drive one loudspeaker from one unbalanced signal fed to the RIGHT RCA input XLR STEREO This option provides a stereo output signal fr...

Page 12: ...iring and multiple cables requiring a large contact area MAINS SWITCH This heavy duty rocker switch in the centre of the panel turns the Mains Line Power to the amplifier ON or OFF An LED in the centre of the front panel indicates that the power is on When first switched on the power LED will vary in brightness for ten seconds this is an initialisation sequence after which the power LED remains li...

Page 13: ... AND OPERATION WARNING RISK OF ELECTRIC SHOCK This amplifier operates at hazardous voltage levels We recommend that any work requiring removal of the lid be referred to a suitably qualified and experienced service technician DO NOT place this amplifier in any position where liquids or any foreign material may accidentally enter it CAUTION Please read and understand the precautions in the Instructi...

Page 14: ...input Also make sure the RCA connectors are a snug fit and are inserted all the way in For XLR input connection make sure you connect the RIGHT XLR input and LEFT XLR inputs to the right and left outputs from your preamplifier respectively Use the Amplifier Configuration Selector switch to select RCA STEREO if you are using unbalanced RCA inputs or to select XLR STEREO if you are using balanced XL...

Page 15: ...k that the connections are tight but do not over tighten If bare wires are used make sure that no loose strands of wire short cross the other terminals or the amplifier chassis When using plugs such as bananas be sure to use good quality plugs with a firm fit BI WIRING Bi wiring uses two pairs of loudspeaker cables for each channel loudspeaker You will notice that the rear panel of your Plinius SA...

Page 16: ... your amplifier to drive one loudspeaker from one unbalanced signal fed to the red RIGHT RCA input In bridged mono mode the only input made to your preamplifier is to the red RIGHT channel RCA input The black LEFT channel RCA input is not connected Next your loudspeakers are connected to both positive channel output terminals So the positive red connection on your loudspeaker is connected to the r...

Page 17: ...t it is in the XLR Balanced Mono position CONNECTING THE MAINS SUPPLY Firstly check that the mains supply voltage printed on the rear of this amplifier is similar to the mains supply voltage in your area If in doubt please consult your Plinius dealer Mains supply power connection is via the plug in lead supplied with your PLINIUS SA 103 Check the wall outlet is switched OFF then connect the local ...

Page 18: ...use replaced When error detection is triggered the power LED will turn off and the mute LED will pulse The internal error LED located towards the front of the circuit board in the top cavity of the amplifier will also light FUSE PROTECTION When any internal fuse is damaged one or more fuse warning LEDs will light These LEDs are under the amplifier lid located near the centre of the main circuit bo...

Page 19: ... small jumper JP5 on the main circuit board at the front left Adjustments are then made by shifting the jumper to the appropriately labelled pins The factory setting is 30 minutes MAINS LINE FUSE A Mains Line fuse is fitted within the IEC Mains Line socket on the rear of the amplifier A small drawer at the bottom of this socket may be removed after the IEC plug is removed by levering it out with a...

Page 20: ... dealer prior to purchase As a general rule the use of high power 200 watt RMS or greater loudspeakers is recommended and desirable However our experience indicates that medium to low power loudspeakers 100 to 200 watt RMS are quite often suitable for use with this amplifier provided the volume is maintained at a level where no distortion is audible Impedance of the loudspeaker load is important t...

Page 21: ...d 3dB at 70kHz DISTORTION Typically 0 05 THD at rated power 0 1 THD and IM worst case prior to clipping CURRENT OUTPUT 50A short duration peak per channel Fuse protected RISE TIME Typically 5us PHASE REPSPONSE 0 at 20Hz and 14 at 20kHz HUM NOISE 100dB below rated output 20Hz to 20kHz A weighted INPUT SENSITIVITY 0 8V RMS for rated output at 1kHz GAIN 32dB Unbalanced 38dB Balanced INPUT IMPEDANCE 4...

Page 22: ...oudspeaker Impedance 18 Loudspeaker Power 18 Mains Line Fuse 17 Mains Supply Connection 15 Mains Switch 10 Mono Operation 9 14 15 Mute Switch 6 Operating Temperature 7 Output Terminals 10 13 Phasing 13 Placement 4 11 Rail Fuses 16 RCA Bridged Mono Input 9 14 RCA Stereo Input 9 12 Rear Panel Layout 8 Remote Trigger 10 Safety Precautions 5 Serial Number 2 Stereo Operation 8 9 12 13 Terminations 13 U...

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