Reference A-300 Power Amplifier

The Reference A-300 celebrates and continues the Plinius tradition of building world-class amplifiers that deliver powerful, pure sound, are built to last and look simply stunning.

The Reference A-300 is an evolution of previous models. Throughout the design process each and every part has been reviewed, evaluated and refined. Every subsection of the electronics boasts changes to components, specification, layout and interconnection resulting in a truly sophisticated amplifier.

The A-300 uses high quality, low-noise, audio grade capacitors, low-noise power components and custom high capacity power supply capacitors. Couple this with a brand new external styling that still pays homage to Plinius’ signature aesthetic and you have a true force of nature.

If you love the feeling of being immersed in music The Reference A-300 promises absolute satisfaction. Power and depth are married together with pureness and clarity.

The Reference A-300 is the pinnacle of the Plinius Range. It’s designed to take advantage of every aspect of the Reference M-10 preamplifier’s sophisticated circuitry and drive the finest high-end speakers with finesse.


300 watts RMS per channel into 8 ohms


1000 watts RMS into 8 ohms 1800 watts RMS into 4 ohms


20Hz to 20kHz ±0.5dB -3dB at 70kHz


<0.03% THD at rated power


100A short duration peak per channel Fuse protected


100dB below rated output 20Hz to 20kHz A weighted


47k ohms


RCA Inputs: 32dB, Balanced Inputs: 38dB


1400W, 4.8A (1100W) Class A Idle, 0.8A (184W) Class AB Idle/Standby


Height: 285mm (11.25")
Width: 510mm (20")
Depth: 550mm (21.75")
Weight: 57kg (125lbs)

Class A/Class AB operation
In Class A distortion is minimised 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 'G7'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.


Witchdoctor Review

'The Plinius Reference amplifiers are fast and snappy and, I believe, have the enviable ability to please both audiophiles and music lovers alike. Even with all that beefy power and deep, tuneful bass, the A-300 and M-10 pairing have a very delicate and discerning touch so any little details and vocal or instrument inflections can be easily distinguished. Nothing I heard sounded exaggerated, not even the lower frequencies – everything was natural and unforced, elegant and neutral.'

Read the full review by Andrew Baker -

Adirondack Audio & Video

'I might as well start right out and say it... I am in awe. My staff are in awe. Random customers walking in during this busy Christmas season are in awe. Even the UPS and FedEx delivery people are in awe. Within seconds of hitting 'play', our jaws dropped to the floor and they haven't come up since.  These new Reference pieces from Plinius are absolutely brilliant! The soundstage, the imaging, the ease of low bass output, the speed and transparency... in all these areas the new Plinius pieces are second to none. They are downright seductive. Everyone here is fighting over who gets to choose the next album we hear. And as if the sound quality wasn't enough... the style, the build quality, and the obvious attention to detail are all evident from the moment the pieces are unboxed. Congrats to the Plinius team for making top-end separates that are truly world class.'

- Jason Tavares
Adirondack Audio & Video