Koru Phono Preamplifier

The Koru phono preamplifier is presented in the Ross Stevens inspired curved chassis, with a slight twist. The chassis is actually two-in-one, allowing physical separation of the power supply from the amplification circuitry.

The power supply boasts a virtual battery approach with over 100,000 micro Farads of capacitance and very sophisticated 2 stage regulation. This ensures the lowest impedance and consequently extreme accuracy of power delivery to the amplification stages.

The amplification and equalisation uses the latest components ensuring accuracy and longevity. Low output moving coil cartridges as well as higher output moving magnet types can be used and there is a full range of user adjustments available on the rear panel.

Both Single Ended and Balanced Output signals are catered for and with passive high frequency and active low frequency equalisation the Koru Phono Preamplifier will maintain stability and finesse no matter what type of music you enjoy.

Handling the original analogue signal from the vinyl with modern electronics components and layout techniques is a satisfying way to mix the old and new technology for a listening session with your favourite artists.


Typically <0.01% THD at all levels below clipping


-80dB at rated input level, A weighted with 5mV input


RCA Unbalanced


RCA unbalanced XLR balanced


0.03A (7W) Idle/Standby


User adjustable, 100pF, 570pF


50dB, 56dB, 60dB, 66dB


47k ohms, 22k ohms, 1k ohms, 470 ohms, 220 ohms, 100 ohms, 47 ohms, 22 ohms


Height: 90mm (3 1/2")
Width: 450mm (17 3/4")
Depth: 400mm (15 3/4")
Weight: 7kg (15lb)

Isolated Power Supply
As well as careful attention to the signal layout, the power supply is physically isolated from the sensitive audio circuits. Having the power supply not only distanced from the audio, but also in a separated enclosure leads to a clear and open reproduction of the music.

Filter Capacitance
With over 100,000uF of filter capacitance, the power supply has been referred to as a ‘virtual battery’ approach delivering an incredibly flat, clean and stable supply to the audio circuits.

Neutrik connectors
High quality Neutrik XLR output connectors ensure a high performance, low distortion interface between your cables and the preamplifier.

Auric Wiring
Audience AV supply the Auric OFC wire used in the input stage of the amplifier. The Auric was chosen for its high workability and natural sound.


Secrets of Home Theatre and High Fidelity

"The Koru is a high-end phono stage at a mid-range price. The bold/elegant styling looks at home next to the fanciest of gear and the refined JFET amplification brings your record’s grooves into the room in an equally bold and elegant fashion."
By Rick Schmidt

Great Solid State Phono – The Plinius Koru…

"Is the Koru right for you? For those seeking a great phonostage as a partner for their turntable, do yourself a favor and put the Plinius Koru on your audition list. It offers fantastic sound, durablility, and a great brand behind it—now just to find a wine to pair with it."
By Jeff Dorgay

The Absolute Sound
Mid-Priced Excellence

"Before I listened to a note of music, the Koru pushed all my buttons by offering enough options for loading and gain to handle all moving magnets and the majority of moving coils likely to be used with it"
By Paul Seydor