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Art Model 311 manual

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Table of contents for the manual

  • Page 1

    The ART Model 311  Precision Stereo 2-Way Active Crossover with Subwoofer Output USER’S GUIDE - 1 -[...]

  • Page 2

    TABLE OF CONTENTS Introduction ........................................................................................... 3 Installation ............................................................................................. 4 AC Power Hookup ............................................................................... 4 Analog Audio Conne[...]

  • Page 3

    INTRODUCTION Thank you for purchasing an ART 311  - and congratulations: You now own one of the most versatile crossove rs available. Offering a superb level of sound quality, the 311  circuit design, combined with a straightforward user interface, quickly and easily gives you access to all of its features. The Model 311  has been carefull[...]

  • Page 4

    INSTALLATION The 311  may be used in a wide variety of applications and environments. Enclosed in a rack-mo untable, all-steel enclosure, the unit is designed for continuous prof essional use. Mounting location is not critical. However, for greater reliability we recommend that you not place the unit on top of power amps or other sources of heat[...]

  • Page 5

    CONTROLS POWER SWITCH The power switch applies and remove s power to the Crossover. Make sure all equipment after the 311  is either off or the outputs are turned all the way down before turning on or off the 311  . LOW OUTPUT LEVEL CONTROL Each channel of the 311  has a Low Output Level control. These controls are used to trim the output [...]

  • Page 6

    The main crossover filters are 4-pole Linkwitz-Riley designs (24dB/octave). This yields a sharp rolloff to help pr otect speakers and the outputs sum to a flat response. HIGH OUTPUT LEVEL CONTROL Each channel of the 311  has a High Output Level control. These controls are used to trim the output levels to the High Output Jacks on the rear of the[...]

  • Page 7

    CONNECTIONS It is easy to interface the unit with a wide variety of equipment. The rear panel has balanced XLR and ¼” inputs as well as unbalanced ¼” outputs. XLR INPUT JACKS (REAR) The XLR input connecti ons are balanced and follow the AES standard for wiring: Pin 1 = Ground, Pin 2 = Hot (+), Pin 3 = Cold (-). This input parallels the ¼” [...]

  • Page 8

    OPERATION The following guideline refers to a P.A. system, but the same basic ideas apply to a home recording setup or a Hi-Fi system. A stereo 2-way sound system is typically set up as follows: Separate high frequency (horn or tweeter) and low frequency (bass) cabinets are used for each side (left and right) of the sound system. The crossover is u[...]

  • Page 9

    3. Connect the Low output of C hannel One to the power amplifier powering the low frequency cabinets (left). 4. Connect the High output of C hannel One to the power amplifier powering the high frequency cabinets (left). 5. Repeat for the right side of the system (Channel Two). 6. Connect the Subwoofer output to the subwoofer amplifier. 7. Set the c[...]

  • Page 10

    WARRANTY INFORMATION Limited Warranty Applied Research and Technology will provide warranty and service for this unit in accordance with the following warrants: Applied Research and Technology, (A R T) warrants to the original purchaser that this product and the components thereof will be free from defects in workmanship and materials for a period [...]

  • Page 11

    SERVICE The following information is provided in the unlikely event that your unit requires service. 1) Be sure that the unit is the cause of the problem. Check to make sure the unit has the proper power supplied, all cables are connected correctly, and the cables themselves ar e in working condition. 2) If you find the unit to be at fault, write d[...]

  • Page 12

    311  SPECIFICATIONS Dimensions 1.75”H x 19”W x 5.5”D Weight 4.85 lbs. (2.2 kg) Input Connections XLR, ¼” TRS, balanced Output Connections ¼”TS, unbalanced Input Impedance 100K ohms Output Impedance 220 ohms Maximum Input Level +21dBu Maximum Output Level +21dBu CMRR >75dB (typical @ 1kHz) Frequency Response 10Hz to 40kHz, +/-.5dB [...]