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Plinius SA-50 Instruction Manual

Summary of SA-50

  • Page 1

    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 m...

  • Page 2

    Plinius sa-50 instruction manual. Page 2 list of contents warnings and precautions. Page 3 amplifier facilities and features. Front panel. 4 amplifier facilities and features. Rear panel 6 amplifier configuration selector (acs) 9 installation and operation. 12 mains / line power connection. 13 chang...

  • Page 3

    Plinius sa-50 instruction manual. Page 3 warning the sa-50 power amplifier can be operated in bridged mode and may deliver in excess of 200 watts into 8 ohms. This amplifier is also capable of a very large peak current delivery. This sa-50 power amplifier operates in class a and is therefore capable...

  • Page 4

    Amplifier facilities and features front panel the front panel of the sa-50 power amplifier incorporates a small panel fitted with three switches. These switches control the day to day functions of the amplifier. The operation of these switches is, from the left; mute switch. It is not recommended pr...

  • Page 5

    Front panel facilities and features continued bias switch. This switch on the right of the panel alters the operating bias of the amplifier. Switch up is bias a/b while switch down is bias a. Bias a/b position reduces the bias on the output stage to operate the amplifier in class ab. This is a bias ...

  • Page 6

    Front panel facilities and features continued rear panel the facilities on the rear panel of the sa-50 may seem complex. The rear panel incorporates all of the terminals for connecting the input signals and output to the loudspeakers. A reasonable understanding of this amplifier and a logical approa...

  • Page 7

    Plinius sa-50 instruction manual. Page 7 front panel facilities and features continued input terminals stereo input terminals for this sa-50 power amplifier are easily accessible and fitted to the top centre area of the rear panel. Rca inputs left & right. These standard type rca terminals are for u...

  • Page 8

    Plinius sa-50 instruction manual. Page 8 front panel facilities and features continued output terminals stereo output connections for the loudspeakers are provided on the left and right hand side of the rear panel. A pair of heavy duty, gold plated five way binding posts for each channel are supplie...

  • Page 9

    Plinius sa-50 instruction manual. Page 9 amplifier configuration selector (acs) the amplifier configuration selector (acs) is a unique switching method that exploits all of the operation features of this amplifier. By using this switch it is possible to operate this amplifier with either balanced or...

  • Page 10

    Amplifier configuration selector continued unbalanced or single-ended or rca or coaxial leads are the most common of all 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 the sa-50 for use as the standard input termina...

  • Page 11

    Amplifier configuration selector continued rca bridged mono. This option configures the whole amplifier to drive one loudspeaker from one unbalanced signal fed to the right rca input. See page 7 & 17. The loudspeaker is connected to both channels + (positive) output terminals. Do not connect anythin...

  • Page 12

    Plinius sa-50 instruction manual. Page 12 installation & operation mains voltage. Check that the mains voltage printed on the rear of this amplifier is similar to the mains voltage normally supplied to your area. If in doubt, please consult your plinius dealer. Placement and ventilation. This sa-50 ...

  • Page 13

    Plinius sa-50 instruction manual. Page 13 mains / line power connection mains / line power connection is via the supplied plug-in lead. The standard iec socket connects the mains power at the amplifier end while a local mains plug is required at the wall end. In the event where a "local" plug needs ...

  • Page 14

    Plinius sa-50 instruction manual. Page 14 changing the mains / line voltage configuration in the event that your mains / line voltage is different to that printed on the back of the sa-50, it may altered by a suitably qualified or experienced person. There are only two options, 110v - 120v or 220v -...

  • Page 15

    Section of rear panel showing rca and xlr inputs rca inputs are the most commonly used and are found on virtually all preamplifiers or other ancillary equipment. For normal stereo use, connect the left channel output of the preamplifier to the left channel input of the sa-50 and the right channel ou...

  • Page 16

    Plinius sa-50 instruction manual. Page 16 connections for stereo operation continued select "xlr stereo" on the acs ( amplifier configuration selector). See page 9. Connections to the xlr sockets are; pin 1 - earth pin 2 - + signal pin 3 - - signal to achieve a sound performance that is correctly al...

  • Page 17

    Plinius sa-50 instruction manual. Page 17 connections for stereo operation continued connect the right hand loudspeaker to the right channel output terminals on the amplifier. Connect the left hand loudspeaker to the left channel output terminals. Connect the positive (+) or red loudspeaker terminal...

  • Page 18

    Plinius sa-50 instruction manual. Page 18 connections for mono / bridged operation mono / bridged operation of the plinius sa-50 amplifier is a very high quality method of achieving very high power output without any compromise of performance. Both channels of the sa-50 combine to form a single chan...

  • Page 19

    Plinius sa-50 instruction manual. Page 19 connections for mono / bridged operation continued select "rca bridged mono" on the amplifier configuration selector (acs). Xlr balanced line input for the mono / bridged option use right channel xlr input. Select the "xlr balanced mono" option on the amplif...

  • Page 20

    Plinius sa-50 instruction manual. Page 20 connections for mono / bridged operation continued connect the positive (+) or red terminal of the loudspeaker to the right channel + (positive) terminal on the amplifier connect the negative (-) or black terminal of the loudspeaker to the left channel + (po...

  • Page 21

    Plinius sa-50 instruction manual. Page 21 why is class a 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 ...

  • Page 22

    Plinius sa-50 instruction manual. Page 22 specifications 50 watts per channel into 8 ohms both channels driven from 20hz to 20khz at 0.09% total harmonic distortion from 0.25watts to rated output. 100 watts rms per channel 20hz to 20khz into 4 ohms. Bridged output: 200 watts rms 20hz to 20khz into 8...

  • Page 23

    Plinius sa-50 instruction manual. Page 23 index . Page acs ( amplifier configuration selector ). 9 balanced line. 9 bias switch. 5 bridging. 9, 18 class a operation. 5, 21 class ab operation. 5 loudspeaker impedance. 20 loudspeaker power. 20 mains/line fuse. 13 mains/line power connection. 13 mains/...