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Summary of Contents for Plinius KORU
- Page 1 KORU Phono Preamplifier Instruction Manual The heart of music www.pliniusaudio.com...
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Page 3: Table Of Contents
All operational, technical and descriptive material in this publication is subject to change at any time without notice. For further product information or queries, please contact your Plinius dealer. Plinius products are designed and manufactured by Plinius Audio Limited, New Zealand. -
Page 4: Introduction
We have designed and manufactured this amplifier to reproduce your favourite music faithfully and accurately. With a little care and a full understanding of the operating recommendations in this manual, your Plinius Koru Phono Preamplifier will provide years of high-quality, trouble-free performance. -
Page 5: Design Philosophy
Design Philosophy From a distance you can see that the design of the Plinius products is more than an applied styling exercise to the front panel. We have started from the ground up to produce a casing for our electronics that is unrivalled in its physical strength and visual simplicity. -
Page 6: Unpacking
Unpacking Open the box from the top and remove the accessories from the foam end caps. You may now proceed to lift the unit from the box, Once the unit is removed you can proceed with the removal of the foam end caps. These caps are designed to fit on the front and back of the unit for maximum protection. -
Page 7: Care & Maintenance
Care & Maintenance With simple care and maintenance your Plinius product can be kept looking and operating like new for many years to come. MAINTAINING THE CONNECTORS Exposed connectors such as the RCA connectors will be subject to environmental factors, and over time the surface may degrade. This can be greatly reduced by fitting readily available ‘RCA caps’... -
Page 8: Precautions
Precautions PLEASE TAKE SPECIAL NOTE OF THE FOLLOWING PRECAUTIONS BEFORE OPERATING YOUR NEW PHONO PREAMPLIFIER. • DO NOT leave flammable material on the phono preamplifier whilst running, as this could pose a serious fire risk. • This phono preamplifier operates at hazardous voltage levels. There are some alterations that may be made by you, the owner. -
Page 9: Front Panel Functions
This panel incorporates the terminals for connecting the input signal from a turntable, outputs to the preamplifier, loading and gain switches and also the mains supply. Please remember that your Plinius Koru Phono Preamplifier is a high quality electronic instrument. Be sure that you understand your system’s requirements fully before you make any connection to this phono preamplifier. -
Page 10: Mains Switch
4. EARTH POST This is a chassis connected gold-plated earth post for use with most vinyl turntables. 5. OUTPUT TERMINALS Connections for line level preamplifiers are provided in the centre of the rear panel. Connections are available for both single ended RCA and balanced XLR cables. The XLR output pin configuration used in all Plinius product is: PIN 1 to GND PIN 2 to +Signal... -
Page 11: Installation & Operation
Preamplifi er until you have read and fully understood these instructions. Although these instructions refer to the connection of the Plinius Koru to a preamplifi er, the Koru can also be safely installed into multimedia systems by following the same installation guidelines. - Page 12 Check the Koru is switched OFF, and connect the IEC end of the cable to the IEC socket at the back of the Koru. With the cord fully connected, switch the wall outlet ON.
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Page 13: Product Features
Please consult your cartridge manufacturer for specific recommendations. PHONO GAIN ADJUSTMENT The Koru Phono Preamplifier can also be set to one of four gain settings to suit your phono turntable specifications using the 2-way mini-switches labelled ‘GAIN’. These 2-way mini-switches allow the gain to be adjusted as low as 50dB, to suit high output Moving Magnet (MM) cartridges, or as high as 66dB for low output Moving Coil (MC) cartridges. - Page 14 Switch ‘2’ is the 10dB adjustment. With switch ‘2’ ON the gain will be increased from the 50dB range to the 60dB range. MAINS/LINE FUSE A Mains/Line fuse is fitted within the IEC socket on the rear of the power supply pack. 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.
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Page 15: Troubleshooting
NO SOUND FROM THE UNIT If the unit is not reproducing audio take the following steps: • Check the source is correctly connected to the Koru Phono preamplifier. Refer to the Installation & Operation section on page 9. • Check the source is playing. Check the tonearm is lowered fully onto the record. -
Page 16: Specifications
Specifications INPUT RCA Unbalanced GAIN User adjustable, 50dB, 56dB, 60dB, 66dB LOAD User adjustable, 47k ohms, 22k ohms, 1k ohms, 470 ohms, 220 ohms, 100 ohms, 47 ohms, 22 ohms INPUT CAPACITANCE User adjustable, 100pF, 570pF FREQUENCY RESPONSE 20Hz to 20kHz +/–0.2dB within RIAA spec SIGNAL TO NOISE RATIO –80dB wrt 5 mV input, A weighted... -
Page 17: Index
Index Display LED....................7 Front Panel Layout ................7 IEC Power Connector ................8, 10 Input Terminals ..................7 Mains/Line Fuse ..................12 Mains Supply Connection .............10 Mains Switch .....................8 Output Terminals ...................8, 9 Phono Cartridge Load Adjustment ........11 Phono Gain Adjustment ..............11 Placement ....................4 Rear Panel Layout.................7 Safety Precautions ................6 Serial Number ..................2... - Page 18 Note: This page has been left blank intentionally...
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