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Summary of Contents for Plinius KORU
- Page 2 We have designed and manufactured this preamplifier to reproduce faithfully and accurately, your favourite music. 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. Serial Number: ................
- Page 3 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.
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Page 4: Table Of Contents
Introduction ..........................Page 3 Precautions ..........................Page 5 Preamplifier Features ........................Page 6 Installation and Operation ......................Page 9 Input/Output Connection......................Page 10 Koru Features ........................... Page 12 Specifications .......................... Page 14 Index ............................Page 15 Contact Details ......................... Page 16... -
Page 5: Precautions
RECAUTIONS Please take special note of the following precautions before operating your new preamplifier: • This preamplifier operates at hazardous voltage levels. We recommend that any work requiring removal of the lid be referred to a suitably qualified and experienced service technician. •... -
Page 6: Preamplifier Features
– F REAMPLIFIER EATURES RONT ANEL Front Panel Layout Showing Power LED POWER LED An LED on the front panel indicates that the power is on. When first switched on, the display LED will immediately light and will remain lit during the time the amplifier is powered on. - Page 7 This panel incorporates the terminals for connecting the input signal from the 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 capable of an exceptional level of performance. Be sure that you understand your system’s requirements fully before you make any connection to this amplifier.
- Page 8 INPUT TERMINALS The input terminals of your Plinius Koru Phono preamplifier are easily accessible at the lower left of the rear panel diagram. RCA INPUTS LEFT & RIGHT: These standard RCA terminals are for use with unbalanced signals from Turntable.
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Page 9: Installation And Operation
(slots in the lid) are not covered or restricted in any way. Also refrain from placing the Plinius Koru on top of other electronic equipment to avoid hum being introduced to the highly sensitive phono stage circuitry. -
Page 10: Input/Output Connection
RCA interconnects or Balanced XLR interconnects connected correctly. Note that the output of the Koru Phono Preamplifier is at ‘line level’ or the same as that of normal CD players, tuners etc. DO NOT connect the output from your Koru to a dedicated preamplifier phono stage as the gain of the Plinius Koru and Preamplifier will be mismatched, which could damage the preamplifier phono stage. - Page 11 WARM-UP PERIOD You will find that the Plinius Koru will become noticeably ‘warmer’ in sound after being on for a period of time. We usually recommend waiting at least 24 hours before expecting the best quality of sound reproduction from your preamplifier. Also, as the Plinius Koru uses very little power while on, we suggest...
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Page 12: Koru 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’. Using the 2-way mini-switches, the gain can 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 13 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 14: Specifications
PECIFICATIONS : Within RIAA Specifications, +/-0.2dB 20Hz to 20kHz REQUENCY ESPONSE : Typically <0.01% THD at all levels below clipping. ISTORTION : -80dB, A weighted with 5mV input. IGNAL OISE ATIO : User selectable, 100pF or 570pF. NPUT APACITANCE : User selectable, 47kΩ, 22kΩ, 1kΩ, 470Ω, 220Ω, 100Ω, 47Ω, or 22Ω. NPUT MPEDANCE : 70mm (2 3/4") -
Page 15: Index
NDEX IEC Power Connector......................Pages 9,11 Input Terminals ........................... Page 8 Mains/Line Fuse ........................Page 13 Mains/Line Voltage ........................Page 9 Mains Supply Connection......................Pages 9,11 Mains Voltage Configuration ......................Page 9 Output Terminals......................... Page 8 Phono Cartridge Load Adjustment ....................Page 12 Phono Gain Adjustment...................... -
Page 16: Contact Details
For further product information or queries, please contact us at the address below. PLINIUS products are designed and manufactured by: Plinius Audio Ltd. P.O. Box 1836 Palmerston North New Zealand Phone: 64 6 354 8583 Facsimile: 64 6 354 8586 Email: info@pliniusaudio.com Internet: www.pliniusaudio.com ©2006 Plinius Audio Ltd.
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