Plinius Audio SA-102 User's Manual
Contents
1. RCA STEREO XLR BALANCED MONO RCA BRIDGED MONO ALA STEREO ALL MONO BRIDGE OPTIONS USE RIGHT INPUT AND LEFT RIGHT OUTPUTS ONLY AMPLIFIER CONFIGURATION SELECTOR e k REFER TO OWNERS MANUAL FOR USAGE INSTRUCTIONS q REAR PANEL SHOWING LOCATION OF INPUT OUTPUT TERMINALS It is important that you connect your loudspeakers outputs and preamplifier inputs to the Plinius SA 102 Power Amplifier correctly to ensure the amplifier is not damaged and sounds its best with your system Now that you have read and familiarised yourself with the connections on the back of the amplifier as covered in the previous section we will describe in detail the different ways in which you can connect the amplifier to your system There are essentially four different ways that you can connect your system components to the Plinius SA 102 Power Amplifier RCA STEREO RCA BRIDGED MONO XLR STEREO XLR BALANCED MONO CON 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 Also make sure the RCA connectors are a snug fit and are inserted all the way in Next connect your loudspeaker wires to the output posts on either side of the rear panel Connect your right loudspeaker le the one on the right of you when seated in your norma2. It is important to achieve good stereo imaging in your listening room By observing the wiring instructions above each Power Amplifier loudspeaker combination should be in phase If you experience poor stereo image and or a lack of bass check that the loudspeaker wiring has been connected correctly We recommend that you use one of the easily obtainable test discs to help you ensure both phasing and channel orientation are correct If in doubt consult your PLINIUS dealer for advice To achieve a sound performance that is correctly aligned to your room make sure all of the leads carrying signals for the RIGHT channel loudspeaker are connected to the RIGHT input to the amplifier from your preamplifier or CD player etc Signals for the LEFT channel should be wired in a similar fashion CONNECTING THE MAINS SUPPLY Now that your Plinius SA 102 Power Amplifier is configured to your system correctly the mains cable can be plugged into the IEC connector on the back of the amplifier Once the power is connected flick the main power switch on the front panel to the right 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 Depress the mute Switch to enjoy your new Plinius SA 102 Power Amplifier SA 102 FEATURES ERROR DETECTION The Plinius SA 102 Po
3. BRIDGED BALANCED Mono OUTPUT 460 Watts RMS 20Hz to 20kHz into 8 ohms FREQUENCY RESPONSE 20Hz to 20kHz 0 2dB 3dB at 5Hz and 3dB at 70kHz DISTORTION Typically lt 0 05 THD at rated power 0 1 THD and IM worst case prior to clipping SATURATION 140 Watts per channel or greater into 89 220 Watts per channel or greater into 40 CURRENT OUTPUT 50A short duration peak per channel Fuse protected RISE TIME Typically Sus PHASE RESPONSE 0 at 20Hz and 14 at 20kHz HUM amp NOISE 100dB below rated output 20Hz to 20kHz A weighted INPUT SENSITIVITY 0 8V RMS for rated output at 1kHz INPUT IMPEDANCE 47kQ HEIGHT 220mm 8 3 4 WIDTH 500mm 19 3 4 DEPTH 455mm 18 WEIGHT 38kg 83lbs 21 AGS AMD COM IduIANOM O rta adas Page 9 Balanced TONA PPP OA a A dai Page 10 A a Pages 20 DIAS L EUS SA baer A O a Page PP RA E i a i a Seed tis Page PENA aaa deo Sina a as Bk a i S Page 15 DAL OM Vlei Li AC LIN sasas aa Sa ia a ai la a a OA Page 3 A An Page 17 o a a a S a a a a Page 17 LOL EE L EAV CN O ii aa a a ia i a ia ni Page 6 SLS RO DC CO Ls sis k aa a Ia ia a la A ARA SRD ta Gr Page 1 Ground Ua EO VL E a aa i i ias a ii i a N S Page 11 IEG POWE CONNCC O ananasas i ai a i ai a a a N Pages 11 12 o a aa o RR Pages 9 14 15 IE DUEL S S I E LO se aaa aa a a i i eent Cnet N E Page 18 EONaSpeaR rm DC CAIN DS R Page 19 KOUSEK T AAA i ai a a a a Di a i arene Page 19 Kelias CMO KS RRRR GEAR RR S
4. PLINIUS SA 102 Class A Power Amplifier MANUAL CONGRATULATIONS on your decision to become the proud owner of this Plinius SA 102 Power Amplifier This manual has been prepared to help you understand the operation of your amplifier and to provide information about its design and the variety 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 102 Power Amplifier will provide years of high quality trouble free performance Serial Number Date of Manufacture A a a e i A teas ta ce IMPORTANT PLEASE TAKE THE TIME TO READ THIS MANUAL THOROUGHLY BEFORE USING YOUR AMPLIFIER CONTENTS o a a i r O a ear E ane Page 3 A E E N a ee T eee eee eee ern Page 5 A NIC Ia sa a a a i i a tel i E S aah ae Page 6 AMONG E UNE SS E TANE eagna tas O ne RE eT mC ee et Page 8 AMD EE GOMMOUPATION E eco AGO aser a ai i a Page 9 Balali 0 UllldalalGE Gl Sigd as aaa a t a i S a Page 10 SAO BIS OO BC Ii OO ea aa i i a a i i i a a tte Page 12 HPU OLD ONE CO e RES O o A Page 13 e Page 14 A Page 15 S LU CONDES e E ai aio Page 17 Re nn Page 19 Sn a i a e a as A ak Page 20 A o sia a i i aa as a Di a a E a aa En Page 21 OS i aaa a els i a i A i L a a a L aaa Page 22 A i ai Page 23 PRECAUTIONS Please take special note of the following precautions before
5. while a more detailed explanation follows later in this instruction manual RCA INPUTS LEFT amp RIGHT These standard RCA terminals are for use with unbalanced signals from most signal sources such as audio preamplifiers XLR BALANCED INPUTS LEFT amp RIGHT XLR connectors fitted to this amplifier are for use with balanced line signals from audio preamplifiers Balanced signals are carried via a three way cable that connects all three pins at each end of the interconnect cable AMPLIFIER CONFIGURATION SELECTOR ACS The Amplifier Configuration Selector ACS is a unique switching method that exploits all of the operational features of your Plinius SA 102 Power Amplifier By using this switch it is possible to operate your amplifier with either balanced or unbalanced signals and achieve a stereo or mono output Stereo or Mono use of this amplifier will depend on the type of ancillary equipment employed with your system If you wish to use this amplifier as a single channel mono Power Amplifier in a stereo high fidelity system then another SA 102 will be required for the other channel This will provide an extremely high performance option RCA STEREO XLR BALANCED MONO RCA BRIDGED MONO ALA STEREO ALL MONO BRIDGE OPTIONS USE RIGHT INPUT AND LEFT RIGHT OUTPUTS ONLY AMIPLIFIER CONFIGURATION SELECTOR REFER TO OWNERS MANUAL FOR USAGE INSTRUCTIONS AMPLIFIER CONFIGURATION SELECTOR The ACS switch options are R
6. all Please remember that your Plinius SA 102 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 RIGHT OUTPUTS LEFT OUTPUTS RIGHT INPUTS LEFT INPUTS B o RCA STEREO XLR BALANCED MONO RCA BRIDGED MONO XLR STEREO ALL MONO BRIDGE OPTIONS USE RIGHT INPUT AND LEFT RIGHT OUTPUTS ONLY AMIPLIFIER CONFIGURATION SELECTOR REFER TO OWNERS MANUAL FOR USAGE INSTRUCTIONS J PLINIUS SA 102 DESIGNED AND MANUFACTURED IN STEREO POWER AMPLIFIER CR AUDIBLE TECHNOLOGIES LTD SERIAL No No VOLTAGE Hz PO BOX 1836 2 BS ON PALMERSTON NORTH 50 CAUTION ENSURE ADEQUATE VENTILATION 55S GROUND MAINS FUSE REPLACE AA46 ONLY WITH TADAL 0 o e e CAUTION TO REDUCE RISK OF ELECTRIC SHOCK DO NOT REMOVE REAR PANEL OF THE PLINIUS SA 102 SHOWING ALL OF THE AVAILABLE FACILITIES INCLUDING INPUT AND OUTPUT TERMINALS ACS AMPLIFIER CONFIGURATION SELECTOR MAINS INPUT AND GROUND LIFT INPUT TERMINALS Input terminals for your Plinius SA 102 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
7. maintained at a level where no distortion is audible Impedance of the loudspeaker load is important to ensure the rated performance of this amplifier Any combination of loudspeakers may be used but the total average impedance load for each channel should be within a range of 4 to 8 ohms Again if you have doubts about the impedance of your loudspeaker configuration we recommend you speak to your PLINIUS dealer WHY CLASS A IS BETTER 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 In a conventional or Class AB amplifier circuit this current flow varies when demand varies Furthermore as current varies the voltage on the rails as seen by the output stage varies too In a Class A circuit current draw should be constant therefore there is an absence of the power supply modulation common in Glass AB design amplifiers Pinpoint images tonal clarification intertransient silence more readily defined dynamic shadings inner detail and authority are all inherent advantages of good Class A design 20 SPECIFICATIONS 125 WATTS RMS PER CHANNEL INTO 8 OHMS BOTH CHANNELS DRIVEN FROM 20Hz TO 20kHz
8. operating your new amplifier The Plinius SA 102 Power Amplifier can be operated in bridged mode and may deliver in excess of 400 watts into 8 ohms This amplifier is also capable of a very large peak current delivery The Plinius SA 102 Power Amplifier operates in Class A It is capable of generating temperatures that could have an adverse effect on other equipment furniture etc DO NOT leave flammable material on the amplifier whilst running as this could pose a serious fire risk The Plinius SA 102 Power Amplifier is of direct coupled design and offers no protection from preamplifiers that have a high DC component at their outputs This amplifier operates at hazardous voltage levels We recommend that any work requiring removal of the lid or base of this amplifier 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 position where liquids or any foreign material may accidentally enter it DO NOT connect any voltage source short circuit earth ground or appliance other than suitable high fidelity loudspeakers to the amplifier output terminals some preamplifiers processors CD players etc produce large switching pulses when switched on causi
9. ATIVE TERMINALS OF THE AMPLIFIER IN THIS MODE CAN CAUSE SERIDUS DAMAGE You can still connect two loudspeakers using the lower positive amplifier output terminals This is explained in the bi wiring section following Now turn the ACS switch fully counter clockwise so that it is in the XLR Balanced Mono position It is now safe to switch on your amplifier TERMINATION QUALITY Quality of the connections must be examined to ensure that high performance trouble free operation is enjoyed Check 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 102 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 With a MONO setup remember that your speaker wires must use the red positive output posts ONLY Connect one speaker cable to the top positive red binding posts and the other speaker cable to the lower positive red binding posts PHASING OR POLARITY
10. CA STEREO This option provides a stereo output via both left and right outout 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 The loudspeaker is connected to both channels positive output terminals giving an available power in this mode four times the rated output of the amplifier approximately 400 watts into 8 ohms Special care must be taken in connecting the input signal and loudspeakers to ensure safe operation and best possible performance XLR STEREO This option provides a stereo output signal from a balanced stereo input signal connected to both the left and right XLR inputs All the advantages of balanced line transmission will be realised with good rejection of noise and some freedom from earth or ground loops hum XLR BALANCED MONO In this mode both channels of your Plinius SA 102 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 As with RCA Bridged configuration the loudspeaker is connected to both channels positive output terminals Available power in this mode is four times the rated output of the amplifier approximately 400 watts RMS into 8 ohms Special care must be taken in connecting the input sign
11. ITION OF ECOLOGIC JUMPERS AND LED BRIGHTNESS ADJUSTMENT POTENTIOMETER 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 flat blade screwdriver The fuse fitted should be rated at no greater than 10 amps slow blow In the unusual event that this fuse should blow you must first establish the cause of this failure such as power surges damaged mains cable etc before replacing the fuse with one of the same rating and type IMPORTANT DO NOT FIT A FUSE WITH A HIGHER RATING LOUDSPEAKER SELECTION Your Plinius SA 102 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 Be certain that your loudspeakers can handle most of the rated output power of this amplifier You may find loudspeaker specifications confusing or misleading so you should discuss this with your audio 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 on this amplifier provided the volume is
12. PCRRDE CR Rn OR RR UR RSRS CRE NS tact ieaadia Page 18 MAIS UPON OR nds Page 12 MA ear RD ne 2 ener rr One E GE OPE caer PDR VERNON ey E CR ae Page 6 Ilio KOP DC AO Iso siai A a a A Pages 10 14 15 MELODY Nes a or S ORAR ER DRE REDE RES JE RG O SR Page 6 Mn O GU PEPE a RE RR O RR Pages 9 12 CUTE CU MO RM eS A O LU A A a cd a tase ees Pages 10 14 15 SAA Pue a Page 15 FKE NO gt RD Pages 5 12 BORRIS O A e Boa or CE E EE a a a a Page 1 A a a a a fare Pages 10 14 a SOS L sao E aaa E a a da ia a E Pages 9 14 A as is ia a a E EAE Page 8 DAC RCC ULO IIS E aisiais E AEE a ia EEES Page 5 Sekta SN DD ai aaa aa anna a Aa aaa d a aa a k e aaa Bi Page 3 O Pages 10 14 15 o RP a o a a ao aaa Page 15 UPVC ANG Ce Male a ba a a aaa TEE EEEE Page 10 Ie VMN ANDAR NS O E RD AR O a a teens Pages 9 12 AGP Balanced MONO INOU cees Pages 10 15 A E aaa aaa at E Pages 10 14 22 CONTACT DETAILS All operational technical and descriptive material published here is subject to change at any time without notice For further product information or queries please contact us at the address below PLINIUS products are designed and manufactured by Audible Technologies Ltd P 0 Box 1836 Palmerston North New Zealand Phone 04 6 354 8585 Facsimile 64 6 354 8586 Email info pliniusaudio com Internet www pliniusaudio com 2002 Audible Technologies 23
13. al and loudspeakers to ensure safe operation and best possible performance BALANCED UNBALANCED SIGNALS Balanced or unbalanced input options will depend on the type of signal available from your preamplifier or other equipment The Plinius SA 102 provides both options to allow you to choose the most suitable preamplifier for your purposes Plinius Preamplifiers offer both balanced and unbalanced output options BALANCED LINE is normally used to transmit signals in a professional environment Because balanced line effectively reduces or eliminates noise pick up by the system cabling it has become increasingly more important in high quality domestic high fidelity systems UNBALANCED leads such as single ended RCA or coaxial are common and are used in the majority of audio signal systems The terminal plug and socket are most commonly called RCA and can be found on your Plinius SA 102 for use as the standard input terminals for both left and right inputs OUTPUT TERMINALS STEREO Output connections for the loudspeakers are provided on the left and right hand side of the rear panel Two parallel pairs of binding posts for each channel are fitted these provide ease of use with bi wiring and multiple cables requiring a large contact area OUTPUT TERMINALS BRIDGED MONO In bridged mono modes the loudspeakers utilise only the positive outputs of your Plinius SA 102 In this configuration power output to the loudspeakers is dramatically i
14. f no signal has been present at the input for a predetermined time This time can be adjusted to Off 15 30 or 60 minutes During the last minute without signal the bias LED will pulse to indicate the unit is about to return to Class AB The purpose of this function is to prevent the amplifier being left in Class A while unattended for a period of time To adjust this time constant the amplifier lid must be removed and the small jumper JP5 located on the main circuit board at the front left shifted to the appropriately labelled pins Please ensure that your amplifier is switched OFF and disconnected from the mains supply before this adjustment is made The factory setting is 30 minutes LED BRIGHTNESS CONTROL Your Plinius SA 102 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 VR Make sure you adjust the correct potentiometer and remember to remove the mains supply from the amplifier before making any adjustments TOWARDS FRONT OF AMPLIFIER TE o Jiske dys 640 ZD14 60 i ZD15 ae SUTIL U inh ae C73 so A le C75 1 s eeg H C76 CN1 Tt E UNDERNEATH t Ecologic Jumper JP5 Error LED LED Adjuster VR7 SECTION OF SA 102 MAINBOARD SHOWING POS
15. inputs at the top of the amplifier back panel Make sure you connect the RIGHT XLR input and LEFT XLR inputs to the right and left outputs from your preamplifier respectively Also make sure the XLR connectors click into place Next connect your loudspeaker wires to the output posts on either side of the rear panel Connect your right loudspeaker ie the one on the right of you when seated in your normal listening position to the right output terminals ensuring that the red positive terminal is connected to the red terminal on your loudspeaker Do the same with the black or negative terminals Now turn the ACS switch fully clockwise then two positions counter clockwise so that it is in the XLR Stereo position It is now safe to switch on your amplifier XLR BALANCED MONO As with RCA Bridged Mono this option configures your amplifier to drive one loudspeaker but from one balanced line input connected to the RIGHT XLR Input In balanced mono mode the only input made to your preamplifier is to the RIGHT channel XLR input The LEFT channel XLR 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 red RIGHT amplifier output and the negative black connection on the loudspeaker should be connected to the red LEFT amplifier output DO NOT CONNECT ANYTHING AT ALL TO THE NEGATIVE TERMINALS MAKING A CONNECTION TO THE NEG
16. l listening position to the right output terminals ensuring that the red positive terminal is connected to the red terminal on your loudspeaker Do the same with the black or negative terminals Now turn the ACS switch fully clockwise so that it is in the RCA Stereo position It is now safe to switch on your amplifier RCA BRIDGED MONO This option configures 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 red RIGHT amplifier output and the negative black connection on the loudspeaker should be connected to the red LEFT amplifier output DO NOT CONNECT ANYTHING AT ALL TO THE NEGATIVE TERMINALS MAKING A CONNECTION TO THE NEGATIVE TERMINALS OF THE AMPLIFIER IN THIS MODE CAN CAUSE SERIDUS DAMAGE You can still connect two loudspeakers using the lower positive amplifier output terminals This is explained in the bi wiring section following Now turn the ACS switch fully clockwise then one position counter clockwise so that it is in the RCA Bridged Mono position It is now safe to switch on your amplifier XLR STEREO Connect your preamplifier or input signal to the two XLR
17. ncreased around four times as much and is commonly used in conjunction with another amplifier for amplification of each channel from the preamplifier Please note that in order to achieve STEREO performance in either of the Mono modes it will be necessary to use two Plinius SA 102 Power Amplifiers one amplifier each for left and right channels GROUND LIFT SWITCH This switch is located adjacent to the Mains Input Socket and allows the signal ground to be disconnected from the chassis In some installations a hum loop may exist due to duplicate ground paths from different equipment Use this switch to remove the connection from OV to ground thus allowing some flexibility in your particular set up Note that in both XLR modes the ground lifting switch should always be set to chassis MAINS POWER CORD IEC CONNECTOR This connector is where the mains supply cable from your wall connects to the amplifier You will notice that a fuse holder is mounted within this connection and it holds a mains fuse to provide surge and overload protection for your amplifier INSTALLATION AND OPERATION PLACEMENT AND VENTILATION Your Plinius SA 102 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 The flow of air around the amplifier should also be kept unimpeded so e
18. ng a loud click through the loudspeakers For this reason turn on all other equipment in your system before turning on your Plinius SA 102 or ensure that the amplifier is in MUTE You will not experience this phenomenon with Plinius Preamplifiers AMPLIFIER FEATURES FRONT PANEL The front of the Plinius SA 102 Power Amplifier incorporates a small panel fitted with three switches These switches control the functions most used on the amplifier P MUTE A BIAS O O Ma B FRONT PANEL LAYOUT SHOWING MUTE MAINS AND BIAS SWITCHES The operation of these switches is from the left 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 switch 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 The switch operates on a pulse system in conjunction with an LED indicator When the amplifier powers up from start the Mute automatically engages and has to be switched for normal listening The Mute switch also disconnects the speakers while the LED is on Take care not to touch any terminals other than the outputs when changing the output loudspeaker leads 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 f
19. nsure that the heat sinks cooling fins are not covered or restricted in any way to ensure adequate ventilation The Plinius SA 102 design incorporates a very high level of mechanical decoupling of the input and output It can however still be influenced by acoustical feedback in the operating environment The use of acoustic cones or a suitably spiked amplifier stand or table may further enhance the performance of this amplifier Consult your PLINIUS dealer for further advice if required MAINS VOLTAGE CONNECTION 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 supplied plug in lead A standard IEC socket connects the mains power at the amplifier end while a local mains plug is required at the wall end The wiring code used inside all Plinius product is Green to Earth Ground Blue to Neutral Brown to Phase Live Should a local plug need fitting to the wall end of the lead ensure that a suitably qualified or experienced service technician wires the plug correctly IMPORTANT DO NOT POWER UP YOUR AMPLIFIER UNTIL YOU HAVE CONNECTED YOUR INPUT OUTPUTS CORRECTLY FOR YOUR SYSTEM AS EXPLAINED IN THE NEXT SECTION INPUT OUTPUT CONNECTION RIGHT OUTPUTS LEFT OUTPUTS 6 a N RIGHT INPUTS LEFT INPUTS N
20. nutes of warm up in Class A before the very best of the amplifier s sonic qualities may be experienced BIAS A This position provides a true 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 BIAS A necessitates two precautions that should be observed 1 On switching to BIAS A the temperature of the amplifier will quickly increase and the amplifier will become quite hot Once again we remind you to ensure that you have left adequate space around the amplifier for ventilation Ensure that no objects are resting on the amplifier and check that the heat sink cooling fins are not obstructed in any way 2 The current required from the mains supply in BIAS 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 AMPLIFIER FEATURES REAR PANEL This panel incorporates all the terminals for connecting the input signals from your preamplifier and output to the loudspeakers and mains supply A reasonable understanding of this amplifier and a logical approach should ensure that you are listening to this amplifier without any difficulties at
21. ront panel indicates that the power is on When first switched on the power LED will pulse for ten seconds this is an initialisation sequence after which the power LED remains lit The amplifier draws a moderately high current when switched on Despite the Soft Start Circuit within the amplifier reducing current demand on the mains as the amplifier is switched on it is not good practice to rapidly turn the Mains switch on and off repeatedly BIAS SWITCH This switch on the right of the panel alters the operating blas of the amplifier The switch operates on a pulse system and lights the Bias LED when the amplifier is switched to Class A In Class AB the LED is off BIAS 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 amplifier designers for their products In Class AB your Plinius SA 102 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 102 switched ON at all times rendering the amplifier ready for use and requiring only a few mi
22. wer Amplifier has in built error detection This will function under the following conditions e When the amplifier is overdriven clipped e lfany internal fuse is damaged Should either of these circumstances arise the amplifier will disconnect both channels and mute the input This condition will remain until the input signal level is reduced or the damaged fuse 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 board with the rail fuse holders If any of the internal fuse LED s are glowing the lid of the amplifier will need to be removed and the fuse adjacent to the lit LED should be replaced Replace them with the same type 10 amp normal blow IMPORTANT DO NOT FIT A FUSE WITH A HIGHER RATING Please note that fuse failure may indicate a severe problem Check all speakers and speaker cables for damage short circuit etc Should the amplifier continue to exhibit rail fuse failure contact your PLINIUS dealer ECOLOGIC CONTROL The Plinius SA 102 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 i
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