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Theta Digital Dreadnaught III Owner's Manual

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THETA DIGITAL
THETA DIGITAL
Dreadnaught III owner's manual
Dreadnaught III owner's manual

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Summary of Contents for Theta Digital Dreadnaught III

  • Page 1 THETA DIGITAL THETA DIGITAL Dreadnaught III owner’s manual Dreadnaught III owner’s manual...

  • Page 3: Preface

    In the unlikely event that you have to return your Dreadnaught III to the factory for service, or if you send it to us for updating, the original packaging will best protect the unit from shipping damage.
  • Page 4 The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of significant magnitude to constitute a risk of electric shock to persons.

  • Page 5: Dreadnaught Iii Identification Record

    Dreadnaught III Identification Record This information is for your records and for future identification of the Dreadnaught III. Please take a moment to fill out all pertinent data now, and as upgrades and/or options are installed. Whenever upgrades, inquiries and/or changes are requested, the serial number will be required.

  • Page 6: Safety Precautions

    BEFORE MAKING ANY CONNECTIONS TO THE DREADNAUGHT III, FIRST TURN OFF THE POWER AND THEN DISCONNECT THE AC POWER CORD. WHEN INSTALLING THE DREADNAUGHT III IN YOUR SYSTEM, MAKE CERTAIN TO ALLOW A MINIMUM OF ½ INCH OF VENTILATION ON EACH SIDE OF THE UNIT. ALSO ALLOW AT LEAST 3 INCHES OF VENTILATION SPACE ABOVE THE UNIT.

  • Page 7: Table Of Contents

    WARNING ......................... iii Dreadnaught III Identification Record ................. iv SAFETY PRECAUTIONS ....................v INTRODUCTION ......................1 Getting to know your Dreadnaught III ................. 1 Burn-In Time ......................1 Reference Manual Conventions..................1 IMPORTANT NOTICE ..................... 2 Dreadnaught III Block Diagram ..................3 Front Panel Layout .......................

  • Page 8: Introduction

    INTRODUCTION Getting to know your Dreadnaught III This Dreadnaught III has been put through a rigorous and unique testing procedure that ensures that it will last for many years with minimal service requirements. This procedure includes the following: • All assembled circuit boards are given a thorough visual inspection and are then tested in a bench- reference Dreadnaught III.

  • Page 9: Important Notice

    IMPORTANT NOTICE It is imperative that the Dreadnaught III be connected to a ground via its three wire AC power cord. It is important that the AC power outlet, which the Dreadnaught III is plugged into, is actually grounded. Failure to do so will severely compromise the performance, reliability and safety of use of the Dreadnaught III.

  • Page 10: Dreadnaught Iii Block Diagram

    Dreadnaught III Block Diagram Figure 1 - Block Diagram (Dreadnaught III showing single channel module)
  • Page 11 Dreadnaught III Block Diagram con’t. Figure 2 - Block Diagram (Dreadnaught III showing two channel module)

  • Page 12: Front Panel Layout

    Front Panel Layout Figure 3a - Front Panel Layout STANDBY button. After the rear panel MAIN POWER switch is turned on press the front panel STANDBY button to exit the standby mode. All channels on the stereo bus will come out of standby. If the surround bus is active, with specific channels assigned to it, they will exit the standby mode as well.

  • Page 13: Front Panel Layout - Rackmount Option

    Front Panel Layout – Rackmount Option Figure 3b – Rackmount Front Panel Layout STANDBY button. After the rear panel MAIN POWER switch is turned on press the front panel STANDBY button to exit the standby mode. All channels on the stereo bus will come out of standby. If the surround bus is active, with specific channels assigned to it, they will exit the standby mode as well.

  • Page 14: Rear Panel Layout

    Channel THERMAL LED. Illuminates when the channel rises above the maximum operating temperature. The Dreadnaught III should be powered off and cooled when this LED is lit. Channel RAIL FUSE + LED. When this LED is illuminated, the fuse on the positive rail of the channel is blown.
  • Page 15 12V (0V to 12V or 12V to 0V) the amp’s surround mode will change from its current status, either on or off. 20. DB9 RS-232 connector. Used for connecting a system control device to the Dreadnaught III to control and monitor its functions.

  • Page 16: Operation

    RS-232 RS-232 is an option in the Dreadnaught III. It can be installed at any time either at the factory or an authorized Theta dealer. All functions of the Dreadnaught III can be controlled and monitored via RS-232, using either the RJ45 or DB9 connector.

  • Page 17: Appendix A Troubleshooting Guide

    Appendix A Troubleshooting Guide If the Dreadnaught III should function abnormally during operation, please review the items in the following checklist. Please be sure to thoroughly check all other connected components such as speakers, preamplifiers, as well as cables. Symptom...

  • Page 18: Appendix B Wiring Diagram

    Consult your speaker manufacturer to ensure that any speaker in your system that will be connected to the Dreadnaught III does NOT have internal circuitry with a common ground. Damage will occur if the negative terminal is connected to ground,...

  • Page 19: Appendix Crs-232 Protocol

    Examples: 1) To select put the Dreadnaught III into standby: Send FE, E8, 01, 00, 00, 00 (all values in Hex). Where FE and E8 are the header, 01 = command, 00 = main standby, 00 = put unit in standby and 00 = filler...
  • Page 20 Command Description Argument 1 Argument 1 Description Argument 2 Argument 2 Desc Argument 3 Arg 3 Desc Standby Main standby Put unit in standby Main standby Take unit out of standby. Surround bus Make surround bus inactive. Surround bus Activate surround bus. Status Return amplifier status.
  • Page 21 RS-232 Hardware Connections Figure 6 – Dreadnaught III RS-232 Jack Pinout These are the connector drawings only. The RS-232 cable must be a regular RS-232 or mouse extender cable, wired pin for pin.

  • Page 22: Rs-232 Jumper Settings

    Figure 7 – Dreadnaught III RS-232 Jumper Settings RS-232 Jumper Settings There are 2 possible Baud rates: 9600 and 19200. The factory default is 19200. To change the baud rate to 9600, move the jumper to the center and top pins (if the RS-232 board is orientated as in figure 7).

  • Page 23: Appendix D Specifications

    Appendix D Specifications Input Impedance 50 Kohms. Single-Ended or Balanced, each phase, both modules. Mono module: Single-ended) 2.5V RMS input for 250W into 8 ohms. Balanced) 1.25V RMS input for 250W into 8 ohms. Input sensitivity Stereo module: Single-ended) 1.5V RMS input for 100W into 8 ohms. Balanced) 0.75V RMS input for 100W into 8 ohms.
  • Page 24 (5 Year optional extended service contract) Theta Digital, henceforth referred to as Theta, warrants the product designated herein to be free of manufacturing defects in material and workmanship, subject to the conditions set forth herein, for a period of 90 days from the date of purchase by the original purchaser, henceforth referred to as purchaser.

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