Plinius SA 103 Stereo Amplifier

Plinius SA 103 Solid State Power Amplifier – delivers “an unusually realistic sonic aesthetic.”,


“The Plinius SA 103 Stereo Amplifier offers a natural, neutral tonal balance, just the right amount of musicality, superb bass performance, plenty of current to drive the most piggish speakers, functional and tasteful design. It is (dare I say it) a good value at its price, considering its performance.”  – Erick Lichte, Stereophile (read the review)

“Compared to the many competing options on the market, the nuanced well-resolved approach of these Plinius electronics should appeal to listeners who not only wish to follow an annotated musical score but simultaneously lust after an unusually realistic sonic aesthetic. – Frank Hakopians, (on the MS pre and SA 103 amp) (read the review)

Plinius SA 103 Stereo AmplifierOverview

Plinius SA 103 Stereo Amplifier

The PLINIUS SA 103 stereo amplifier is a Class A amplifier capable of delivering up to 125 watts per channel in both Class A and Class AB mode. Bridged Mono RCA and Balanced Mono XLR circuits used in the SA103 allow Monoblock operation delivering in excess of 400 watts.

This amplifier gets you into serious listening without breaking the bank. The Plinius SA 103 Stereo Amplifiers are often sold as monoblocks and if you want to and you have time to arrange it, the factory can ensure they are made consecutively. Plinius’ distinctive heatsink profile has allowed us to maintain the classic look and produce an amplifier capable of operating in Class A without the use of troublesome fans or other methods used for cooling. Its 500mm by 455mm footprint belies the power it produces and these units sit comfortably beside big speakers, understating somewhat their contribution to the speaker’s performance. As with all Plinius amplifiers, premium components have been used throughout. There is the addition of a 12 Volt trigger which will allow integration into a semi automated system. These units are at the top of the Plinius range, sitting right under the SA Reference amplifier. With responsiveness and control they faithfully support your speakers as they seek to replicate the original artist’s efforts for your listening pleasure. Available in silver or black anodised with a linished finish.

 Plinius SA 103 Stereo Amplifier 2


Class A/Class AB operation In Class A distortion is minimized for ultimate sonic performance. In Class AB, performance is still exceptional but power consumption and heat output are reduced.

Amplifier Configuration Selector (ACS) switch The rear panel ACS switch allows for the amplifier to be configured for Stereo RCA, Bridged Mono RCA, Stereo XLR or Bridged Mono XLR modes. In Bridged Mono mode, the amplifier operates in true balanced configuration from input to output. Ecologic Control The amplifier can automatically switch from Class A to Class AB when unused after a listening session. This user adjustable feature is set to 30 minutes during manufacture and can also be switched off entirely. Remote Trigger Input When connected to a preamplifier trigger output, the amplifier will switch out of Mute and into Class A Mode ready for use when the preamplifier is taken out of standby. Ground Lift Switch This allows for the signal ground to be isolated from the main chassis earth. This can assist in resolving unwanted ground loops or hum due to duplicate ground paths in some systems. WBT and Neutrik Connectors High quality WBT RCA and Neutrik XLR input connectors are fitted along with WBT output speaker terminals to ensure a low distortion interface between your cables and the amplifier. Auricap Capacitors Audience AV supply the Auricap XO capacitors used in key areas of the circuit. The Auricap was chosen for its superior clarity and dynamic ability. Siltech Wiring Siltech premium silver/gold wire provides a perfect connection between components to give clear, fast and detailed presentation of the music signal. Aluminium Construction The aluminium construction provides a rigid non-magnetic housing to eliminate unwanted magnetic fields that can interfere with the sensitive audio signals.

Plinius SA 103 Stereo Amplifier 3


Plinius SA 103 Stereo Amplifier

  • POWER 125 watts RMS per channel into 8 ohms 220 watts RMS per channel into 4 ohms Both channels driven from 20Hz to 20kHz at less than 0.05% total harmonic
  • MONO OUTPUT 400 watts RMS into 8 ohms 730 watts RMS into 4 ohms 20Hz to 20kHz
  • FREQUENCY RESPONSE 20Hz to 20kHz ±0.2dB 0dB at 1Hz and -3dB at 70kHz
  • DISTORTION Typically 0.1% THD and IM worst case prior to clipping
  • CURRENT OUTPUT 50A short duration peak per channel Fuse protected
  • RISE TIME Typically 5µs
  • HUM & NOISE 100dB below rated output 20Hz to 20kHz, A-weighted
  • INPUT IMPEDENCE 47k ohms
  • GAIN RCA Inputs: 32dB Balanced Inputs: 38dB
  • POWER/CURRENT CONSUMPTION 700W 2.1A (485W) Class A Idle 0.4A (92W) Class AB Idle/Standby
  • DIMENSIONS Height: 220mm (8 3/4 “) Width: 500mm (19 3/4″) Depth: 455mm (18″) Weight: 38kg (83lb)