Crown Micro-Tech 1200 Operation Manual
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Crown Micro-Tech 1200 Operation Manual

Micro-tech series
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Operation Manual

Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice: Crown, Amcron and ODEP are registered trademarks of Crown International. Grounded Bridge is a trademark of
Crown International. Other trademarks are the property of their respective owners.
Micro-Tech Series
Some models may be exported under the name Amcron.
©2003 by Crown Audio, Inc. P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 574-294-8000
Micro-Tech
600, 1200, & 2400
Micro-Tech
601, 1201, & 2401
®
102990-6A
03/03

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Summary of Contents for Crown Micro-Tech 1200

  • Page 1: Operation Manual

    To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com. Trademark Notice: Crown, Amcron and ODEP are registered trademarks of Crown International. Grounded Bridge is a trademark of Crown International. Other trademarks are the property of their respective owners.

  • Page 2: Important Safety Instructions

    RATIONS DOIT ETRE FAIRE PAR PERSONNEL QUALIFIÉ SEULMENT. IMPORTANT The Micro-Tech 2400/2401 requires Class 1 output wiring. The Micro-Tech 600/601/ & 1200/1201 require Class 2 output wiring. MAGNETIC FIELD CAUTION! Do not locate sensitive high-gain equip- ment such as preamplifiers or tape decks directly above or below the unit.

  • Page 3: Table Of Contents

    10.2 US and Canada Service ... 23 10.2.1 Service at a US or Canada Service Center ... 23 10.2.2 Factory Service ... 23 10.2.3 Factory Service Shipping Instructions ... 23 11 Warranty ... 24 Crown Factory Service Information Form ... 27 page 3...

  • Page 4: Welcome

    4 1 Welcome Crown's Micro-Tech 600, 1200 and 2400 are • Patented ODEP the original industry standards for touring tion Protection) circuitry compensates for amplifiers. Micro-Tech amplifiers are known overheating and overload to keep the around the world as the benchmark for high- amplifier working.

  • Page 5: Setup

    Micro-Tech Series Power Amplifiers 3 Setup 3.1 Unpack Your Amplifier YOU WILL NEED (not supplied): • Input wiring cables • Output wiring cables Rack for mounting amplifier (or a stable surface for stacking) WARNING: Before you start to set up your amplifier, make sure you read and observe the Important Safety Instruc- tions found at the beginning of this man-...

  • Page 6: Choose Input Wire And Connectors

    3 Setup 3.4 Choose Input Wire and Connectors Crown recommends using pre-built or profes- sionally wired, balanced line (two-conductor plus shield), 22-24 gauge cables and connec- tors. Depending upon which amplifier input you choose, you should use either 3-pin male XLR connectors, TRS phone connectors, or terminal forks at the amplifier inputs.

  • Page 7: Choose Output Wire And Connectors

    Micro-Tech Series Power Amplifiers 3 Setup 3.5 Choose Output Wire and Con- nectors Crown recommends using pre-built or profes- sionally wired, high-quality, two-conductor, heavy gauge speaker wire and connectors. Use banana plugs, spade lugs or bare wire for your output connectors (Figure 3.5). To prevent short circuits, wrap or otherwise insulate exposed loudspeaker cable connectors.

  • Page 8: Wire Your System

    Mono. ing. INPUTS: Connect input wiring to Channel 1 NOTE: Crown provides a reference of wiring pin only. assignments for commonly used connector types in the Crown Amplifier Application Guide OUTPUTS: Connect the speaker across the posi- (Section 1.21.) available at www.crownaudio.

  • Page 9: Set Input Sensitivity

    26 dB. The 26 dB gain setting is equivalent to a sensitivity of 2.1 volts for the Micro-Tech 600, 2.5 volts for the Micro-Tech 1200 and 3.2 volts for the Micro-Tech 2400. To change the input sensitivity: CH-1 1.

  • Page 10: Operation

    8. Do Not operate the amplifier with less than the rated load impedance. Due to the amplifier's output pro- tection, such a configuration may result in prema- ture clipping and speaker damage. Remember: Crown is not liable for damage that results from overdriving other system components. Operation Manual...

  • Page 11: Controls, Indicators And Connectors

    Micro-Tech Series Power Amplifiers 4 Operation 4.2 Controls, Indicators and Connectors 4.2.1 Front Panel Facilities A. Filter Grille Supports and protects the dust filter (B). To clean the dust filter, detach the grille by remov- ing the three screws that hold it in place. B.

  • Page 12: Rear Panel Facilites

    4 Operation 4.2.2 Rear Panel Facilities F. Power Cord All units are shipped with an approprate plug and cord for the required AC voltage. G. Stereo/Mono Modes Switch • Use Stereo mode for normal two-channel oper- ation. • Use Bridge-Mono mode to drive a single chan- nel with a load impedance of at least 4 ohms.

  • Page 13: Advanced Features And Options

    2400s have an internal fuse that protects the low-voltage power supply and cooling fan. The high-voltage power supplies for the Micro-Tech 600 and 1200 are protected by internal fuses, while the power supplies for the Micro-Tech 2400 high-voltage supplies are protected by circuit breakers.

  • Page 14: Advanced Features

    C 6594-3 is a quieter, low-velocity fan blade that in many cases can provide adequate cooling. Crown part C 6593-5 is a reverse air flow fan blade which changes the direction of the air flow in and out of the amplifier (not rec- ommended for the Micro-Tech 2400).

  • Page 15: Principles Of Operation

    Operation Manual Crown also invented the four-quadrant topol- ogy used in the output stages of each Micro- Tech amplifier (see Figure 6.1). This special circuitry is called the Grounded Bridge. It...

  • Page 16: Stereo Operation

    6 Principles of Operation 6.2.1 Stereo Operation For simplicity, the discussion of Stereo opera- tion will refer to one channel only. Mono opera- tion will be discussed later. For specific circuit references, see the block diagram in Figure 6.1. The signal at the ¼-inch phone jack input passes directly to the balanced gain stage (U104-A and U104-B).

  • Page 17: Bridge-Mono Operation

    Micro-Tech Series Power Amplifiers 6 Principles of Operation To further protect the output stages, the pat- ented ODEP circuitry is used. It produces an analog output proportional to the always changing die temperature of the output transis- tor. This output controls the translator stage previously mentioned, removing any further drive that may exceed the safe operating area of the output stage.

  • Page 18: Troubleshooting

    Try to identify and correct the problem before resetting the breaker. If the problem persists, refer the unit to an autho- rized Crown Service Center. • The amplifier output is shorted. First discon- nect your speakers from the affected chan- nel(s) one by one to determine if one of the loads is shorted.

  • Page 19: Specifications

    DC Output Offset (Shorted input) Input Impedance (nominally balanced, nominally unbalanced) Load Impedance (Note: Safe with all types of loads) Stereo Bridge Mono Parallel Mono Operation Manual MT-600 MT-1200 400 W 675 W 325 W 480 W 220 W 310 W 750 W...
  • Page 20 Weight (120VAC, 60-Hz units) Net Weight Shippping Weight Weight (International units) Net Weight Shipping Weight page 20 MT-600 MT-1200 26 dB 26 dB 35.0 dB 36.0 dB 30.0 dB 31.0 dB 50/60 Hz, 100 - 240 VAC (±10%) 50/60 Hz, 100 - 240 VAC (±10%)

  • Page 21: Ac Power Draw And Thermal Dissipation

    65%. • Typical quiescent power draw for the Micro- Tech 600 is 65 watts; typical quiescent power draw for the Micro-Tech 1200 and 2400 is 80 watts. • Quiescent thermal dissipation equals 222 btu/hr at 65 watts and 273 btu/hr at 80 watts.

  • Page 22: Thermal Dissipation

    Thermal Dissipation Figure 9.1 Micro-Tech 600 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 9.2 Micro-Tech 1200 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 9.3 Micro-Tech 2400 Power Draw, Current Draw...

  • Page 23: Service

    Crown factory. For warranty service, we will pay for ground ship- ping both ways in the United States. Contact Crown Customer Service to obtain prepaid shipping labels prior to sending the unit. Or, if you prefer, you may prepay the cost of shipping, and Crown will reim- burse you.

  • Page 24: Warranty

    ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any inten- tional misuse, accident, negligence, or loss which is covered under any of your insurance contracts.
  • Page 25 “Crown” in this warranty. ITEMS EXCLUDED FROM THIS CROWN- WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product...
  • Page 26 Micro-Tech Series Power Amplifiers This page intentionally left blank. page 26 Operation Manual...

  • Page 27: Crown Factory Service Information Form

    If warranty has expired, payment will be: ! Cash/Check Card Number:___________________________________ Signature:______________________________________________________________________ Operation Manual Crown Factory Service Information Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 Phone: 1-800-342-6939 or 1-574-294-8200 Fax: 1-574-294-8124 ! Visa ! Master Card ! C.O.D.

This manual is also suitable for:

Micro-tech 1201Micro-tech 6002400Micro-tech 601Micro-tech 2401Micro-tech 2400

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