Plinius SB-301 Instruction Manual
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Plinius SB-301 Instruction Manual

Plinius instruction manual sb-301
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Summary of Contents for Plinius SB-301

  • Page 2 We have designed and manufactured this amplifier 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 SB-301 Power Amplifier will provide years of high-quality, trouble-free performance. Serial Number: Final Test Certified By: ...

  • Page 3: 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 4: Table Of Contents

    Installation and Operation ... Page 11 Input/Output Connection ... Page 12 RCA Connection ... Page 12 XLR Connection ... Page 13 SB-301 Features ... Page 15 Loudspeaker Selection ... Page 17 Specifications ... Page 18 Index ... Page 19 Contact Details ... Page 20...

  • Page 5: Precautions

    Please take special note of the following precautions before operating your new amplifier: • The Plinius SB-301 Power Amplifier may deliver in excess of 300 watts into 8 ohms. This amplifier is also capable of a very large peak current delivery.

  • Page 6: Features - Front Panel

    (connected to the remote trigger terminals described later). When the Standby LED is on, the external processor has muted the SB-301 and put the amplifier into power saving low bias mode. ERROR LED This LED on the right of the panel will flash only when an error condition has been detected by the SB-301 microcontroller.

  • Page 7: Amplifier Features - Rear Panel

    Please remember that your Plinius SB-301 Power Amplifier 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 or adjust the ACS (Amplifier Configuration Selector).

  • Page 8: Input Terminals

    INPUT TERMINALS Input terminals for your Plinius SB-301 Power Amplifier are easily accessible and fitted to the top centre area of the rear panel. A brief summary of connection possibilities is listed below, while a more detailed explanation follows later in this instruction manual.

  • Page 9: Balanced/Unbalanced Signals

    BALANCED/UNBALANCED SIGNALS Balanced or unbalanced input options will depend on the type of signal available from your processor or other equipment. The Plinius SB-301 provides both options to allow you to choose the most suitable processor for your purposes. BALANCED LINE is normally used to transmit signals in a professional environment. Because balanced line effectively reduces or eliminates noise pick-up by the system cabling, it has become increasingly more important in high-quality domestic high fidelity systems.

  • Page 10: Ground Lift Switch

    GROUND LIFT SWITCH This switch is located adjacent to the Mains Input Socket, and allows the signal ground to be disconnected from the chassis. In some installations a hum loop may exist due to duplicate ground paths from different equipment. Use this switch to remove the connection from 0V to ground thus allowing some flexibility in your particular set-up.

  • Page 11: Installation And Operation

    PLACEMENT AND VENTILATION Your Plinius SB-301 is designed to operate at a moderately high temperature, even more so when used in Class A. The ideal location is on a rigid stand or floor mounted away from direct contact with any temperature sensitive materials or deep pile carpets.

  • Page 12: Input/Output Connection

    It is important that you connect your loudspeakers (outputs) and preamplifier or processor (inputs) to the Plinius SB-301 Power Amplifier correctly to ensure the amplifier is not damaged, and sounds it’s best with your system. Now that you have read and familiarised yourself with the connections on the back of the amplifier as covered in the previous section, we will describe in detail the different ways in which you can connect the amplifier to your system.
  • Page 13 Bi-wiring uses two pairs of loudspeaker cables for each channel loudspeaker. You will notice that the rear panel of your Plinius SB-301 has two pairs of output terminals for this purpose. When using bi-wires, connect each wire pair to a corresponding pair of binding posts (one cable to the top pair, one cable to the bottom) paying special attention to positive (+) red and negative (-) black polarity.

  • Page 14: Connecting The Mains Supply

    Plinius SB-301 Power Amplifier. WARM-UP PERIOD You will find that the Plinius SB-301 will sound its best 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 amplifier.

  • Page 15: Sb-301 Features

    LED BRIGHTNESS CONTROL Your Plinius SB-301 has an internal LED brightness control that will adjust all three front panel LEDs. A small flat bladed screwdriver can be used to adjust the brightness. The LED brightness control is a small multi turn potentiometer and is located on the front of the main circuit board within the top cavity of the amplifier, and is labelled VR7.

  • Page 16: Mains/Line Fuse

    MAINS/LINE FUSE A Mains/Line fuse is fitted within the IEC Mains/Line socket on the rear of the amplifier. 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.

  • Page 17: Loudspeaker Selection

    OUDSPEAKER ELECTION Your Plinius SB-301 Power Amplifier is designed for use with high fidelity loudspeakers. It should not be used to operate any other type of appliance or equipment. Choice of loudspeakers is one of personal taste, providing the chosen loudspeakers are suitable for use with your amplifier.

  • Page 18: Specifications

    310-WATTS CONTINUOUS PER CHANNEL INTO 8 OHMS. BOTH CHANNELS DRIVEN FROM 20Hz TO 20kHz. : 20Hz to 20kHz ±0.2dB. -3dB at 1Hz and -3dB at 70kHz. REQUENCY ESPONSE : Typically <0.05% THD at rated power. 0.1% THD and IM worst case prior to clipping. ISTORTION : 50A short duration peak per channel.

  • Page 19: Index

    NDEX ACS (Amplifier Configuration Selector) ... Page 8 Balanced Signal... Page 9 Bi-wiring... Page 12 Date of Manufacture ... Page 3 Error Detection... Page 14 Front Panel Layout ... Page 6 Fuse Protection... Page 14 Ground Lift Switch ... Page 10 IEC Power Connector ...

  • Page 20: 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 ONTACT ETAILS ©2005 Plinius Audio Ltd.

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