AT6012 12-CHANNEL 6-ZONE POWER AMPLIFIER OWNER’S GUIDE
Table of Contents Functional Description .............................. Page 3 Unpacking ............................................... Page 3 Precautions .............................................. Page 4 Safety Instructions .................................... Page 5 Notes On “Hum” ........................................ Page 6 Cooling .................................................... Page 7 Placement ................................................ Page 7 Rack Mounting ...........................
Functional Description The AT6012 is a 12-channel, 6-zone power amplifier designed to provide audiophile-quality sound in multi-room installations. The AT6012 consists of six 2-channel modules (DMC 4). Each zone’s volume (gain) can be remotely adjusted via a “dry” 3-wire connection from control devices such as Crestron, Xantech, Phast etc. Please consult the instruction manuals from those companies to ensure compatibility. The AT6012 can be activated remotely via a DC current of 3 to 24 V.
Precautions The amplifier is a wideband design with substantial power output capability. Certain precautions must be taken to ensure proper operation. 1. Never expose the unit to moisture. 2. Never plug an input cable into the amplifier while the amplifier is turned on. 3. Never apply the “thumb test” (touching the “hot” lead of the input cable with your finger) to the tip of the input cable or input jack of the amplifier.
Safety Instructions WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. Read all the safety and operating instructions before connecting or using this unit. All warnings on the unit and in this operating manual should be adhered to. All operating and use instructions should be followed. Do not use this unit near water: for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool.
Notes On “Hum” With the growing sophistication of home theater systems, the potential for ground loops is enormous. Do not automatically assume that one or more of your components are at fault, or even defective. Lately, one of the biggest culprits is the Cable-TV incoming signal line. Almost 100% of the cases where hum has been a problem have been due to one or more of the below conditions.
Cooling WARNING: AN AMPLIFIER’S PERFORMANCE MAY DETERIORATE IF IT OVERHEATS. TEMPERATURE AND VENTILATION ARE KEY FACTORS IN PROPER OPERATION. NOT ONLY SHOULD YOU PROVIDE ENOUGH SPACE AROUND THE UNIT, BUT ALSO ENSURE THAT AIR CAN FLOW FREELY AND ESCAPE FROM THE AMPLIFIER’S SURROUNDINGS. Placement During normal home operation, the heatsinks of the AT6012 will become warm. However, there are instances during high-level playback into low impedance speakers when the heatsinks will become much warmer than usual.
Electrical Connections In order to have the wiring concealed, all electrical connections are made in the rear of the amplifier. CAUTION: ALL CONNECTIONS SHOULD BE MADE WITH THE AC POWER CORD UNPLUGGED AND THE POWER SWITCH IN THE STANDBY (OFF) POSITION. UNDER NO CIRCUMSTANCES SHOULD CONNECTIONS TO EITHER THE INPUT OR OUTPUT JACKS BE MADE WITH THE POWER ON. Input Connections Well-shielded audio cables should be used for the input connections.
OUTPUTS FROM ZONE CONTROLLER RCA CABLES ZONE VOLUME CONTROLS INPUTS TO POWER AMPLIFIER REMOTE TRIGGER 3.
Loudspeaker Ratings Virtually any loudspeakers can be connected to, and driven by the AT6012. The AT6012 can drive low impedance speakers at more than adequate power levels with no difficulty. Many loudspeaker systems which are nominally rated at 4 Ohms will drop in impedance in some parts of their frequency range, often to 2 Ohms. You should not experience any problems at these low impedances unless you demand excessively high volume levels.
Circuitry The amplifier is totally complementary from input to output. This is achieved by using dual-differential input stages. Full-complimentary push-pull pre-drivers follow the input stages. These in turn are direct-coupled (all stages after the AC coupled input are DC coupled) to two push-pull drivers. All stages up to this point are operated in true Class A. The drivers then drive the full complementary output stage.
AT6012 Specifications The following applies to all 12 channels being driven simultaneously with 8 ohm loads and an input sensitivity of 28dB gain unless otherwise specified. Frequency Response ±0.1dB from 20Hz to 20kHz at 1 watt Phase Response +5 to -15 degrees from 20Hz to 20kHz at 1 watt Signal-to-Noise Ratio “A-Weighted” Greater than 100dB below rated FTC Full Bandwidth Power Total Harmonic Distortion (THD) Less than 0.
General Maintenance And Service Great care has been taken to ensure that your amplifier is as flawless in appearance as it is in performance. The front panel is finished with a high-grade anodizing process for durability as well as beauty. It is best cleaned with a soft cloth dampened with a mild solution of liquid detergent and water. CAUTION: UNDER NO CIRCUMSTANCES SHOULD A LYE SOLUTION, POWDERED CLEANSER, OR ABRASIVE CLEANER BE USED ON THE UNIT.
Warranty (USA Only) LIMITED SEVEN-YEAR WARRANTY This ATI product is warrantied against defects in materials and workmanship for seven years from the date of purchase by the original owner. The date of purchase shall be established by the original owner presenting to the ATI Customer Service Facility the original owner’s purchase receipt or sales slip showing from whom the product was purchased, the date of purchase and the purchase price of the unit.
Save For Your Reference Date of Purchase _________________________________ Model Number ___________________________________ Serial Number ___________________________________ Where Purchased _________________________________ _________________________________ _________________________________ Notes ______________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________
Amplifier Technologies, Inc. 19528 Ventura Boulevard #318 Tarzana, CA 91356 (818) 343-4777 Fax: (818) 343-7444 http://www.ati-amp.com EMAIL: amptech@ix.netcom.
