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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.  REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY. 

 

TO PREVENT FIRE OR SHOCK HAZARD, DO NOT ALLOW LIQUIDS TO SPILL OR OBJECTS TO FALL INTO 

ANY OPENINGS OF THE PRODUCT. 

 

THIS UNIT IS SUPPLIED WITH A 3 PIN GROUNDED AC PLUG. ALWAYS INSERT THE AC PLUG INTO A 

GROUNDED OUTLET.  DO NOT REMOVE THE GROUND PIN OR DISABLE THE GROUND FOR ANY PURPOSE. 

 

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.  IMPROPER VENTILATION OF THE UNIT MAY CAUSE OVERHEATING, WHICH MAY 
DAMAGE THE UNIT AND CAUSE A FIRE.  PLACE THE UNIT ON A SOLID SURFACE ONLY. I.E. NOT ON 

CARPET, ETC. 

 

DO NOT PLACE THE DREADNAUGHT III NEAR HEAT SOURCES SUCH AS DIRECT SUNLIGHT, STOVES, HEAT 

REGISTERS, RADIATORS OR OTHER HEAT PRODUCING EQUIPMENT. 

 

TO PREVENT DAMAGE TO THE ANALOG OUTPUT CIRCUITRY, BE CERTAIN NOT TO SHORT THE OUTPUT 
SIGNAL TO GROUND.  ENSURE THAT YOUR AUDIO OUTPUT CABLES DO NOT HAVE ANY INTERNAL 

SHORTS BEFORE CONNECTING THEM TO THE DREADNAUGHT III. 

 

IF REPLACEMENT OF THE AC LINE FUSE AND/OR ANY INTERNAL FUSE BECOMES NECESSARY, REPLACE 

ONLY WITH SAME VALUE AND TYPE OF FUSE.  NEVER BYPASS THE FUSE. 

 

IF THE AC CORD BECOMES DAMAGED, DO NOT USE IT.  IMMEDIATELY REPLACE IT WITH A NEW ONE OF 

THE SAME OR BETTER RATING. 

 

IT IS IMPERATIVE THAT THE DREADNAUGHT III BE OPERATED IN A WELL VENTILATED ENVIRONMENT 
AND THE IMMEDIATE EXTERNAL TEMPERATURE BE MAINTAINED AS SPECIFIED.  EXTERNAL COOLING 

FANS MAY BE REQUIRED IN SOME CASES.  DO NOT STACK ANY EQUIPMENT DIRECTLY ABOVE OR BELOW 
THE DREADNAUGHT III AS TO PROTECT IT FROM OVERHEATING, AS WELL AS THE CONTINUED 

FUNCTIONALITY OF ANY EQUIPMENT NEAR AND AROUND IT. 

 

EACH CHANNEL IS A BALANCED BRIDGE AMPLIFIER, THUS THE NEGATIVE SPEAKER TERMINAL IS NOT A 

GROUND, AND CANNOT BE CONNECTED TO A SYSTEM GROUND OR LOUDSPEAKER SYSTEM WITH A 
COMMON GROUND.  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.  

 

AFTER MARKET and THIRD PARTY MODIFICATIONS

 

 

Please note that any after market and/or third party modifications will void the warranty.  In the case of 
changing the feet on a unit, in order to prevent any damage (which will also not be covered under 

warranty), please verify that the screws being used to secure non-Theta feet do not screw any deeper into 
the chassis than the original ones.  The original screw is 1/4-20 by 1/2 and goes into the chassis 1/4 inch. 

 

Содержание Dreadnaught III

Страница 1: ...THETA DIGITAL THETA DIGITAL Dreadnaught III owner s manual Dreadnaught III owner s manual...

Страница 2: ......

Страница 3: ...ernal cooling fans may be required in some cases Do not stack any equipment directly above or below the Dreadnaught III to protect it from overheating as well as the continued functionality of any equ...

Страница 4: ...ateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the product WARNING TO REDUCE THE RISK OF FIR...

Страница 5: ...ta now and as upgrades and or options are installed Whenever upgrades inquiries and or changes are requested the serial number will be required SERIAL NUMBER DATE PURCHASED DEALER S NAME DEALER S ADDR...

Страница 6: ...T CIRCUITRY BE CERTAIN NOT TO SHORT THE OUTPUT SIGNAL TO GROUND ENSURE THAT YOUR AUDIO OUTPUT CABLES DO NOT HAVE ANY INTERNAL SHORTS BEFORE CONNECTING THEM TO THE DREADNAUGHT III IF REPLACEMENT OF THE...

Страница 7: ...rence Manual Conventions 1 IMPORTANT NOTICE 2 Dreadnaught III Block Diagram 3 Front Panel Layout 5 Front Panel Layout Rackmount Option 6 Rear Panel Layout 7 OPERATION 9 Single and Two channel Modules...

Страница 8: ...in torture rack to test for any possible component failures It is then tested on an audio analyzer for all pertinent parameters The unit has all remaining chassis components installed and then undergo...

Страница 9: ...wise the amplifier s power output may be compromised IV DO NOT remove any cover panels from the Dreadnaught III as there are no user serviceable components inside Refer servicing and updating to quali...

Страница 10: ...3 Dreadnaught III Block Diagram Figure 1 Block Diagram Dreadnaught III showing single channel module...

Страница 11: ...4 Dreadnaught III Block Diagram con t Figure 2 Block Diagram Dreadnaught III showing two channel module...

Страница 12: ...by If the surround bus is active with specific channels assigned to it they will exit the standby mode as well 2 SURROUND button Activates deactivates the SURROUND bus 3 SURROUND LED Illuminates when...

Страница 13: ...Activates deactivates the SURROUND bus 3 SURROUND LED Illuminates when the surround bus is active 4 THERMAL LED Illuminates when any channel s temperature rises above the maximum operating temperatur...

Страница 14: ...nding post on the single channel module will operate optimally using spade lugs 5 Channel RAIL FUSE LED When this LED is illuminated an internal fuse on the negative rail of the channel is blown Inter...

Страница 15: ...in the 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 II...

Страница 16: ...d by the standby state Each module can be assigned to operate on either the STEREO or SURROUND buss When the Dreadnaught III has more than two modules installed in it it is recommended that the front...

Страница 17: ...panel fuse is open Replace with same type and rating ONLY Circuit breaker is open AC outlet Check the AC outlet circuit breaker and reset if necessary or contact your dealer No audio output STEREO SU...

Страница 18: ...t as short as possible for best sound quality Figure 5 Examples of Typical Input and Output Connections optional connection WARNING Each channel is a balanced bridge amplifier thus the negative speake...

Страница 19: ...se refer to page 15 or information on changing these settings All commands will follow the format Header Command Identifier Argument 1 Argument 2 Argument 3 where Header FEh E8h 254 232 Command identi...

Страница 20: ...mplifier status The RS 232 can be set using a hardware jumper to automatically send changes to the RS 232 port Status Byte Byte Description bit Value Description 1 Bus 0 Main bus 1 Surround bus 2 Temp...

Страница 21: ...14 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...

Страница 22: ...ins if the RS 232 board is orientated as in figure 7 The STATUS can be returned to the controller either automatically every time a parameter has changed or the user can request it manually The factor...

Страница 23: ...dule 8 ohms one channel driven 250 W rated 325 W typical 8 ohms five channels driven 250 W rated 245 W 260 W typical 4 ohms one channel driven 450 W rated 475 W 525 W typical 2 ohms one channel driven...

Страница 24: ...ts and to change the prices or specifications of any product without notice or obligation to any person 3 REMEDY In the event the above product fails to meet the warranty and the above conditions have...

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