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Symetrix 306 User Manual

Symetrix 306 preamp/ducker
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306 Preamp/Ducker

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  • Page 1 306 Preamp/Ducker...

  • Page 2: Table Of Contents

    Symetrix part number 53306-0A00 Subject to change without notice. '1999, Symetrix, Inc. All right reserved. Symetrix is a registered trademark of Symetrix, Inc. Mention of third-party products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Symetrix assumes no responsibility with regard to the performance or use of these products.

  • Page 3: Chapter 1 Introduction

    A line-level, direct page output is also provided by the 306, for added flexibility. The left and right program inputs and mix outputs of the 306 allow for mono or stereo operation.

  • Page 4: Chapter 2 Operator Safety Summary

    306. In case of failure, refer all servicing to the factory. Servic- ing is required when the 306 has been damaged in any way, such as when a power supply cord or plug is damaged, liquid has been spilled or...

  • Page 5: Chapter 3 Fast Setup

    Fast Setup Chapter 3 Fast First-Time Setup This section provides simple instructions to begin using the 306. Please refer to later chapters for detailed descriptions of product features and applications. ¥ Set the T control to the 9:00 position. HRESHOLD ¥...

  • Page 6: Chapter 4 Front Panel Overview

    Front Panel Overview Chapter 4 DUCKER OUTPUT THRESHOLD (dBv) DEPTH (dB) HOLD RELEASE GAIN (dB) 2 Sec 2 Sec PREAMP/ DUCK CLIP DUCKER BYPASS .25 Sec 4 Sec .5 Sec 4 Sec PAGE PROGRAM Ducker Controls LED — This LED lights to indicate that the page signal has exceeded the ducker threshold (see T , below), and ducking of the program material is occurring.
  • Page 7 LED — This LED is a warning light, which illuminates just before clipping (distortion) occurs in the output stage of the 306. This LED should never light, or should only flash occasionally (on peaks in the program material or page signal). If the C...

  • Page 8: Chapter 5 Rear Panel Overview

    — Set this switch to the line position if your paging source is a line-level source, such as the output of a mic preamp. If your paging source is a mic-level source, such as the output of a microphone, set this switch to the mic position to engage the 306 s microphone preamp. PAGE...

  • Page 9: Chapter 6 Applications

    (such as a lounge), but the same announcements need to be heard in both locations. This would call for two Symetrix 306 s. Connect the paging source to the P...
  • Page 10 (toward Program) and the page audio will cause ducking, but will not pass to the outputs of the 306. Adjust the amount of ducking with the Depth control. Another example of this type of use may be seen when visiting a certain family-oriented pizza restaurant chain.

  • Page 11: Chapter 7 Troubleshooting

    306 s Mic/Line switch to the out position? If the distortion is occurring only in the program material signal, then you may be feeding the 306 a program signal that is too hot.
  • Page 12 Check input signal levels. The input may be too low in level. If so, boost the incoming signal. Check the setting of the Mic/Line switch for the 306 s Page Input. If the incoming page signal is Mic level, make sure that the Mic/Line Switch is set to the in position. If the incoming page signal is Line level, the Mic/Line switch must be set to the out position.

  • Page 13: Chapter 8 Specifications

    Program Path THD+Noise <.025% (+4dBu in, +4dBu out, 0dB ducking) Output Gain +/-20dB In the interest of continuous product improvement, Symetrix, Inc. reserves the right to alter, change, or modify these specifications without prior notice. ©1999, Symetrix, Inc. All rights reserved.

  • Page 14: Chapter 9 Block Diagram

    Block Diagram Chapter 9 LEFT LEFT BALANCED BALANCED PROGRAM IN MIX OUT LEFT UNBALANCED GAIN PROGRAM IN LEFT UNBALANCED MIX OUT RIGHT BALANCED RIGHT PROGRAM IN BALANCED MIX OUT RIGHT UNBALANCED PROGRAM IN DUCK RIGHT THRESHOLD UNBALANCED MIX OUT DEPTH CONTROL VOLTAGE CLIP...

  • Page 15: Chapter 10 Warranty And Service

    In no event will Symetrix be liable for any incidental or consequential damages including but not limited to damage for loss of...
  • Page 16 (you wouldn t believe how many units are returned with bent ears). We will return the unit in Symetrix packaging. Of course, if the repair is due to operator error, parts and labor will be charged. In any event, if there are charges for the repair costs, you will pay for the return freight.

  • Page 17: Chapter 11 Declaration Of Conformity

    The authorized representative located within the European Community is: World Marketing Associates P.O. Box 100 St. Austell, Cornwall, PL26 6YU, U.K. Date of issue: April 30, 1999 Place of issue:Mountlake Terrace, Washington, USA Authorized signature: Dane Butcher, President, Symetrix Incorporated.
  • Page 20 Symetrix, Inc. 6408 216th St. SW Mountlake Terrace, WA, 98043 Tel: (425) 778-7728 Fax: (425) 778-7727 Website: http://www.symetrixaudio.com Email: symetrix@symetrixaudio.com...

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