THETA DIGITAL C O R P O R A Intrepid Owner’s Manual T I O N
PREFACE CONGRATULATIONS You have just acquired one of the most advanced and versatile components for the amplification of audio ever to have been developed. IMPORTANT Save all packaging in a dry place away from fire hazards. Your Intrepid is a precision electronic instrument and should be properly packaged any time shipment is made. In the unlikely event that you have to return your Intrepid to the factory for service or updating, the original packaging will best protect the unit from shipping damage.
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. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
Intrepid Identification Record This information is for your records and for future identification of the Intrepid. 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.
SAFETY PRECAUTIONS Please carefully read each item of the operating instructions and safety precautions before installing and using this product. Use extra care to follow the warnings written on the product itself and/or in the operating instructions. Keep the operating instructions and safety precautions for future reference. CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE ANY OF THE COVER PANELS. NO USER-SERVICEABLE PARTS INSIDE. PERSONNEL ONLY.
Table of Contents PREFACE ........................................................................................................................................................... i WARNING ...................................................................................................................................................... ii Intrepid Identification Record..........................................................................................................................
INTRODUCTION Getting to know your Intrepid This Intrepid 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 benchreference Intrepid. • The tested, assembled circuit boards are then installed in a new Intrepid and the whole unit is tested for every function and parameter.
IMPORTANT NOTICE I. It is imperative that the Intrepid be connected to a ground via its three wire AC power cord. It is important that the AC power outlet, which the Intrepid is plugged into, is actually grounded. Failure to do so will severely compromise the performance, reliability and safety of use of the Intrepid. II. Ventilation is an important issue when placing the Intrepid in a system. Make certain that the Intrepid is placed in a well-ventilated area or rack unit.
Intrepid Block Diagram 3 Figure 1 - Block Diagram (Intrepid showing one output module)
Front Panel Layout Figure 2 - Front Panel Layout 1. 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 will come out of standby. 2. STANDBY LED. Illuminates red when the power amplifier is in STANDBY, green when the amplifier is active. 3. THERMAL LED. Illuminates when any channel’s temperature rises above the maximum operating temperature and puts the Intrepid into standby.
Rear Panel Layout Figure 3 – Rear Panel Layout showing the optional RS-232 Jacks installed 1. BINDING POST. Connect plus and minus speaker wires for one speaker to appropriately marked terminals of each post. The binding posts can accept spade lugs, banana plugs or bare wire. 2. SINGLE-ENDED input jack. 3. BALANCED input jack. 4. AC POWER INPUT. 5. Rear panel FUSE. If necessary, replace with same type and rating only. 6. Main Power Switch. Master power switch. Disconnects AC to all circuits.
OPERATION Before turning on the Intrepid, ensure that all precautions and warnings have been carefully reviewed and adhered to. Damage to the Intrepid caused by improper operation, wiring and/or ventilation will not be covered under warranty and Theta will not be liable for any consequential damage or loss.
Appendix A Troubleshooting Guide If the Intrepid 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 Possible Cause(s) Remedy No power or front panel lights and no sound. Power cable is not inserted 100% into AC input connector. Ensure that the AC cord is inserted all the way into the Intrepid and that the wall outlet is active.
Appendix B Wiring Diagram This section provides an example illustration of an input and output wiring scheme. Before making any connections, please turn off ALL audio and video devices. Unplug those that do not have a main power switch. It is recommended that all cables, including speaker cables be kept as short as possible for best sound quality. Figure 4 - Examples of Typical Input and Output Connections ------------ = optional connection.
Appendix C RS232 Protocol RS232 settings are internally definable via jumper blocks, to accommodate interfacing with a wide range of control products. Baud rate Echo status Baud rate: Echo status: 9600 or 19200 AUTO or REQUEST Maximum number of bits per second. The duration of a single bit is equal to 1 / baud rate.
Status Description Standby Argument 1 0 0 0 Argument 1 Description Main standby Main standby Return amplifier status. Argument 2 Argument 2 Desc Argument 3 Arg 3 Desc 0 Put unit in standby 1 Take unit out of standby. 10 The RS232 can be set using a hardware jumper to automatically send changes to the RS232 port. Five bytes will be returned, the fifth byte contains no information.
RS232 Hardware Connections Figure 5 – Intrepid RS232 Jack Pinout 11
Figure 6 – Intrepid RS232 Jumper Settings RS232 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 RS232 board is orientated as in figure 6). The STATUS can be returned to the controller either: automatically every time a parameter has changed, or the user can request it manually. The factory default is AUTO.
Appendix D Inputs: Specifications Analog audio: 1 Single-ended per channel (RCA). 1 Balanced per channel (XLR). Input Impedance: 50 KΩ Single-Ended or Balanced, for each phase. Input sensitivity: (Single-Ended) (Balanced) (Single-Ended) (Balanced) 1.5V RMS input for 100W into 8 ohms. 0.75V RMS input for 100W into 8 ohms. 25.5dB (19x). 31.5dB (38x). Gain: Polarity: Outputs: Analog Audio: (Single-Ended) Non-Inverting. (Balanced) Pin-2 = Positive, Pin-3 = Negative for Non-Inverting Output.
90 DAY LIMITED WARRANTY TERMS AND CONDITIONS (3 Year optional extended service contract) 1. Theta Digital Corporation, 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.
