Symetrix 302 User Manual
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Symetrix 302 User Manual

Symetrix 302 dual microphone preamplifier
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302 Dual Microphone
Preamplifier

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Summary of Contents for Symetrix 302

  • Page 1 302 Dual Microphone Preamplifier...

  • Page 2: Table Of Contents

    Symetrix part number 53302-0A01 Subject to change 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: Introduction

    Variable gain inputs with 15dB pads allow Website: www.symetrixaudio.com the 302 to handle any input level up to +14dBV. Phantom power is available at both inputs. In addition, both channels include a polarity switch to correct for improperly wired cables or unresolvable mic placement problems.

  • 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 302 or other equipment in your cautions are found throughout this manual system. wherever they may apply.

  • Page 5: Chapter 3 Fast Setup

    Fast First-Time Setup Follow these instructions to get your 302 up-and-running as quickly as possible. The intent of this section is fast setup only. Please refer to later chapters for explanation of the 302’s controls and functions. Set the Microphone 1 and Microphone 2 GAIN controls completely counter-clockwise.

  • Page 6: Chapter 4 Front Panel Controls

    302. This is to avoid a loud “pop” which occurs due to the sudden change in voltage on XLR pins 2 & 3 when they are connected to, or disconnected from, Phantom Power.

  • Page 7: Chapter 5 Rear Panel Connections

    RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ. Rear Panel POWER INPUT - 7-pin DIN receptacle. Connect this to the 7-pin DIN plug of a Symetrix PS-3, PS-3E or PY-3 only. Connect the AC power connector of the PS-3 or PS-3E to an AC power source that is of the correct voltage and frequency, as marked on the PS-3 or PS-3E.

  • Page 9: Chapter 6 Using The 302

    Including the 15dB pad, the total range is 75dB, with a minimum overall gain of 5dB. Any mic output level is easy to match with the 302’s stepless gain control, regardless if it is the -60dBV to -80dBV levels common with ribbon mics or the near line level often delivered by transformerless condenser mics.
  • Page 10 The dominant remote powering system in use today is the phantom power system, which is compatible with both condenser and non-condenser microphones (dynamics, ribbons, etc.). If your microphone’s specifications sheet claims that it requires phantom power, the Symetrix 302 can power it.

  • Page 11: Chapter 7 Applications

    “Out” POLARITY: “Out” PHANTOM POWER: “Out” Slowly turn the GAIN control clockwise until the desired output level from the 302 is achieved. If needed, engage the PAD and POLARITY switches. DYNAMIC OR RIBBON MICROPHONE. THE 15dB PAD AND PHANTOM POWER SWITCHES SHOULD BE IN THE OUT POSITION.
  • Page 12 302 through a 1:1 low-impedance transformer, without over- loading the input of the 302. Never connect the guitar or bass directly to the mic input of the 302. The transformer connected between the guitar/bass and the 302 protects the circuitry of the guitar/bass from Phantom Power, and it protects the 302’s Phantom Power from short-...

  • Page 13: Chapter 8 Troubleshooting

    POWER LED not on Is the unit plugged in? Is the AC outlet OK? CLIP LED on constantly Make sure that you are feeding the 302 a mic-level signal, not line-level. Turn the GAIN control counter-clockwise and/or engage the mic pad. If the CLIP LED is still on, reduce the level of signal that you are sending to the input of the 302.

  • Page 14: Chapter 9 Specifications

    <-128 dBu (150 Ohms source, 60 dB gain 22 kHz bandwidth) Minimum Gain 20dB Maximum Gain 60dB In the interest of continuous product improvement, Symetrix, Inc. reserves the right to alter, change, or modify these specifications without prior notice. ©1998, Symetrix, Inc. All rights reserved.

  • Page 15: Chapter 10 Warranty And Service

    SOLELY and exclusively as limited to repairing or replacing, at stated herein. Symetrix’s option, the part or parts of the product which prove defective in material or This Symetrix product is designed and workmanship within one (1) year from date...
  • Page 16 Servicing the 302 If you have determined that your 302 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, 14926 35th Ave. West, Lynnwood, Washington, USA, declare under our sole responsibility that the product: 302 Dual Microphone Preamplifier 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 18: Tel (425) 787-3222

    Symetrix, Inc. 14926 35th Ave. West Lynnwood, WA, 98037-2303 Tel: (425) 787-3222 Fax: (425) 787-3211 Website: http://www.symetrixaudio.com Email: symetrix@symetrixaudio.com...

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