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Summary of Contents for Symetrix 308
- Page 1 308 VCA Volume Control/ Loudness EQ...
- Page 2 Symetrix, Inc. If, however, your only means of access is electronic, permission to print one copy is hereby granted.
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Page 3: Table Of Contents
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Contents Before You Begin Signal Flow Diagram What Ships in the Box Troubleshooting Getting Help Optional Rackmount Accessories Hardware Specifications Notational Conventions in this User Guide Operational Safety Summary Architects and Engineers Specifications... -
Page 4: Before You Begin
Notational Conventions in this User Guide Note Identifies information that needs extra emphasis. Generally supplies extra information to help you to better use the 308. CAUTION Identifies information that, if unheeded, may cause damage to the 308 or other equipment in your system. -
Page 5: Operational Safety Summary
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Before You Begin | What Ships in the Box | Getting Help | Optional Rackmount Accessories | Notational Conventions in this User Guide | Operator Safety Summary | Equipment Markings Operator Safety Summary Equipment Markings Follow all warnings and instructions. -
Page 6: 308 Product Information
The Audio Inputs & Outputs Rear-panel Euroblock connectors 308 is a half-rack unit that fits on a accept balanced or unbalanced line- shelf next to a mixer/amp or mounts level signals. in a rack with optional Symetrix RM-3. -
Page 7: Making Hardware Connections
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Making Hardware Connections | Overview of Rear Panel Connectors and Controls | Fast First-Time Setup | Controlling Channel Levels From a Potentiometer or Voltage Ramp | Controlling Channel Levels By a Variable Resistor | Unbalanced Connections | Input and Output Connector Wiring... - Page 8 At full volume (+10V control voltage), the EQ response is flat and the 308 gain is at unity (the 308 will not add gain to your system). At lowered volume, the midrange response is reduced to a maximum of –15 dB @ 1 kHz, effectively boosting...
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Page 9: Fast First-Time Setup
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Making Hardware Connections | Overview of Rear Panel Connectors and Controls | Fast First-Time Setup | Controlling Channel Levels From a Potentiometer or Voltage Ramp | Controlling Channel Levels By a Variable Resistor | Unbalanced Connections | Input and Output Connector Wiring... -
Page 10: Controlling Channel Levels From A Potentiometer Or Voltage Ramp
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Making Hardware Connections | Overview of Rear Panel Connectors and Controls | Fast First-Time Setup | Controlling Channel Levels From a Potentiometer or Voltage Ramp | Controlling Channel Levels By a Variable Resistor | Unbalanced Connections | Input and Output Connector Wiring... -
Page 11: Controlling Channel Levels By A Variable Resistor
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Making Hardware Connections | Overview of Rear Panel Connectors and Controls | Fast First-Time Setup | Controlling Channel Levels From a Potentiometer or Voltage Ramp | Controlling Channel Levels By a Variable Resistor | Unbalanced Connections | Input and Output Connector Wiring Controlling Channel Levels By a Variable Resistor (ie., a rheostat) -
Page 12: Unbalanced Connections
Notes The output signal level of the 308 will be 6 dB lower when driving an unbalanced input without a transformer or matching interface device. To avoid this, use the Symetrix 303 Interface Amplifier or 307 Dual Isolation Transformer. -
Page 13: Input And Output Connector Wiring
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Making Hardware Connections | Overview of Rear Panel Connectors and Controls | Fast First-Time Setup | Controlling Channel Levels From a Potentiometer or Voltage Ramp | Controlling Channel Levels By a Variable Resistor | Unbalanced Connections | Input and Output Connector Wiring... -
Page 14: Signal Flow Diagram
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Signal Flow Diagram LEVEL BALANCED BALANCED INPUT SUBTRACT OUTPUT BANDPASS FILTER DEPTH EQ VCA DC CONTROL 10V REF REMOTE LEVEL VCA CONTROL DC CONTROL RAMP... -
Page 15: Troubleshooting
Check cables and connections to see if: • Inputs are driving outputs, and outputs are driving inputs. • That there is a signal from the source and that it is getting to the 308. Check if unit is plugged in. -
Page 16: Hardware Specifications
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Hardware Specifications Input/Output Maximum Input Level +20 dBu balanced, +20 dBu unbalanced Maximum Output Level +22 dBu balanced, +18 dBu unbalanced Input Impedance >20k ohms balanced, >10k ohms unbalanced Output Impedance 200 ohms balanced, 100 ohms unbalanced Input Common Mode Rejection >40 dB... -
Page 17: Architects And Engineers Specifications
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Architects and Engineers Specifications The VCA volume control / loudness EQ Screwdriver adjustable trimpots shall The VCA volume control / loudness EQ shall provide two channels of remote be provided for selecting the amount... -
Page 18: Warranty
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Warranty Following are the terms and limitations of Symetrix’s total liability on any claim, buyer within the Continental United States. the Symetrix warranty. whether in contract, tort (including At Buyer’s request and expense Product negligence) or otherwise arising out of, will be returned via airfreight. -
Page 19: Service
Pack the box full of Styrofoam peanuts. Be sure there is enough clearance in the carton to protect the rack ears (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. -
Page 20: Declaration Of Conformity
Symetrix 308 VCA Volume Control/Loudness EQ User’s Guide Declaration of Conformity We, Symetrix, Inc. 6408 216th St. SW, Mountlake Terrace, Washington USA declare under our sole responsibility that the product: 308 VCA Volume Control/Loudness EQ to which this declaration relates, is in conformity with the following standard: EN 55103-2 Electromagnetic Compatibility—Product Family Standard for Audio, Video, and... - Page 22 Symetrix, Inc. 6408 216th St. SW Mountlake Terrace, WA 98043 Tel: (425) 778-7728 Fax: (425) 778-7727 Web site: http://www.symetrixaudio.com Email: symetrix@symetrixaudio.com...
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