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Symetrix 305 User Manual

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305 Distribution Amplifier (1x4)

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  • Page 1 305 Distribution Amplifier (1x4)

  • Page 2: Table Of Contents

    Subject to change at our whim and fancy without notice. '1998, 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

    DAT recorder to contain this powerhouse unit. and to a media feed. The Symetrix 305 fits the bill nicely, supplying four separate, isolated We recommend that you read this manual outputs.

  • Page 4: Chapter 2 Operator Safety Summary

    Identifies information that, if not for persons who operate the equipment as well heeded, may cause damage to the as repair personnel. Specific warnings and 305 or other equipment in your cautions are found throughout this manual system. wherever they may apply.

  • Page 5: Chapter 3 Fast Setup

    Follow these instructions to get your 305 up-and-running as quickly as possible. The intent of this section is fast setup. Refer to later chapters for explanation of the 305 s controls and functions. Connect audio inputs and outputs. If you do not know how to do this, forget Fast Set-Up and read Chapter 5.

  • Page 6: Chapter 4 Front Panel Overview

    CD player, for example), turn the INPUT level control clockwise to boost the signal. Conversely, if you’re feeding a +8 broadcast level signal to the 305 then turn the INPUT level control counter- clockwise until the proper LED display is achieved.

  • Page 7: Chapter 5 Rear Panel Overview

    If you experience hum or noise, make sure that both the 305 and the device which you are feeding to the 305 s input are grounded on the same AC mains circuit. If this is not the source of the noise problem, you must isolate the unbalanced output from the balanced input with an audio trans- former or matchbox.
  • Page 8 Connect the cable shield at the 305 s ground and at the input connector of the unbalanced input. The output signal level of the 305 will be 6 dB lower when driving an unbalanced input without a transformer or matching interface device.

  • Page 9: Chapter 6 Connecting To Other Gear

    Symetrix equipment inputs are designed to bridge the output of whatever device drives the input (i.e. to be greater than 10 times the actual source impedance). Symetrix equipment outputs are designed to drive 600-ohm or higher loads (600-ohm loads are an archaic practice that won t go away).
  • Page 10 In an emergency (the show must go on), you can ground pin 3, but if you have the choice...leave it open. If you must ground pin 3, it must be grounded at the 305, rather than at the other end of the cable. The price, regardless of whether or not pin 3 is grounded is 6 dB less output level.
  • Page 11 Balanced Terminal Strip (When Using CIRCUIT Ground) (Wire Shield Not Connected) Channel Input Two Conductor Shielded Cable Balanced Female XLR (When Using CIRCUIT Ground) Channel Pin 1=Not Connected Input Pin 2 = High Pin 3 = Low Shield Tab = Not Connected Two Conductor Shielded Cable TRS Plug...

  • Page 12: Chapter 7 Signal Flow Chart

    Signal Flow Chart Chapter 7 Input Output A Level Level Output B Level CLIP Input LED Output C Display Level Output D Level...

  • Page 13: Chapter 8 Troubleshooting

    Are all system components on the same AC ground? Check the level of the input signal on the 305 s LED display. Is the Distortion CLIP light on all the time? If so, reduce the incoming signal level by turning the INPUT level counterclockwise.

  • Page 14: Chapter 9 Specifications

    Size (hwd) 1.75 x 8.5 x 6.5 in., 4.445 x 21.59 x 15.875 cm. Shipping Weight 4.5 lbs In the interest of continuous product improvement, Symetrix, Inc. Electrical reserves the right to alter, change, or modify these specifications Power Requirements 117V AC nominal, 95-130V AC, 50 to 60 Hz without prior notice.

  • Page 15: Chapter 10 Warranty And Service

    SOLELY and exclusively as limited to repairing or replacing, at Symetrix s option, the part or parts of the stated herein. product which prove defective in material or This Symetrix product is designed and...
  • Page 16 Servicing the 305 If you have determined that your 305 requires repair services and you live outside of the United States, please contact your local Symetrix dealer or distributor for instructions on how to obtain service. If you reside in the U.S. then proceed as follows: Before sending anything to Symetrix, contact our Customer Service Department for a return authorization (RA) number.

  • Page 17: Chapter 11 Declaration Of Conformity

    Declaration of Conformity We, Symetrix Incorporated, 6408 216th St. SW, Mountlake Terrace, Washington, USA, declare under our sole responsibility that the product: 305 Distribution Amplifier (1x4) to which this declaration relates, is in conformity with the following standards: EN 60065 Safety requirements for mains operated electronic and related apparatus for household and similar general use.
  • 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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