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Summary of Contents for Symetrix 304
- Page 1 304 Headphone Amplifier User’s Guide...
- Page 2 Safety User’s Guide 6408 216th Street SW Mountlake Terrace, WA 98043 USA +1.425.778.7728 +1.425.778.7727 | www.SymetrixAudio.com...
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Page 3: What Ships In The Box
User Serviceable Parts: There are no specified by the manufacturer, user serviceable parts inside this Symetrix or sold with the apparatus. product. In case of failure, customers When a cart is used, use inside the U.S. should refer all servicing to caution when moving the cart/ the Symetrix factory. -
Page 4: Fast First Time Setup
First Time Setup User’s Guide Introduction The Symetrix 304 Headphone Amplifier is a 1-in / 4-out with a stereo input provides a quick check of the mono amplifier designed to drive multiple headphones of any compatibility of a stereo mix. For that matter, you may want impedance. -
Page 5: Front/Rear Panel Overview
PS-3 or PS-3E. Thru A TRS jack connected in parallel with Input A jack. Use this jack to connect to other 304’s or other audio equipment. Thru B TRS jack connected in parallel with Input B jack. Use this jack to connect to other 304’s or other audio equipment. -
Page 6: Impedance, Sensitivity, Loudness
The minimum operating impedance, or maximum load, impedance and sensitivity information. for each output of the 304 is 8 Ohms. Use as many pairs Proprietary high voltage driver technology allows the 304 to of headphones as desired, as long as the total combined drive even high impedance headphones to maximum levels, impedance (per output) does not fall below 8 Ohms. - Page 7 Applications 304 Headphone Amplifier The 304 can be used in the following applications. Please note that this list is far from comprehensive and your imagination may create new uses that we haven’t listed here. Project Studio: Let the 304 expand your mixer’s headphone capacity. You can drive it via a tip-ring-sleeve to dual tip-sleeve cable from your mixer’s headphone jack,...
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Page 8: Block Diagram
Block Diagram User’s Guide HIGH HIGH VOLTAGE VOLTAGE HEAD- HEAD- PHONE PHONE LEVEL 1 LEVEL 1 HIGH HIGH HEADPHONE HEADPHONE VOLTAGE VOLTAGE OUTPUT 1 OUTPUT 1 HIGH HIGH VOLTAGE VOLTAGE HIGH HIGH HIGH HIGH LINE LINE FILTER FILTER VOLTAGE VOLTAGE VOLTAGE VOLTAGE HEAD-... -
Page 9: Troubleshooting Chart
“line” level (+4dBu is nominal) Make sure that the signal you are feeding to the 304 is a line level signal, not mic level. Make sure that all systems components are on the same AC ground. Check gain settings on upstream equipment. -
Page 10: Architects And Engineers Specifications
The headphone amplifier shall be capable of delivering 35 volts peak-to-peak into a 2000 Ohm load (or greater). The unit shall be capable of operating by means of a Symetrix PS-3 or PS-3E external power supply connected to 115 VAC nominal (95 to 130 VAC), 50/60 Hz or 230 VAC nominal, 207 to 253 VAC, 50 Hz where applicable. -
Page 11: Warranty And Service
We won’t herein, shall extend to the original purchaser and anyone who purchases return the unit in anything but Symetrix packaging for which we will have the product within the specified warranty period. - Page 12 User’s Guide © 2009 Symetrix, Inc. All rights reserved. Printed in the United States of America. The information in this document is subject to change without notice. Symetrix, Inc. shall not be liable for technical or editorial errors or omissions contained herein; nor is it liable for incidental or consequential damages resulting from the furnishing, performance, or use of this material.
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