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ATI Amplifier Technologies - AT 3003 - 3 Channels Stereo Amplifier

ATI Amplifier Technologies Inc.

ATI Amplifier Technologies - AT 3003 Series - Multi-Channel Stereo Amplifier 

Featuring true differential design, this series represents ATI's “Pure Balance”® technology balanced from input to output. The design allows the quietest and purest reproduction of the audio signal. The AT3000 series amps are available in 2 to 7 channel configurations. Each model in the series comes standard with 2 massive toroidal transformers and can be upgraded at the factory by changing power transformers, adding power modules and a new rear panel. The maximum is 7 channels. A common ground all home theater enthusiasts can find is that the best possible design is the fully differential balanced amplifier.

A fully differential amplifier is basically two separate amplification circuits per channel. One channel is inverted at the input and the output of each is summed allowing the speakers to be driven by a push/pull action; because of this, it automatically rejects any noise coming from external sources, eliminates hum and reduces distortion. For better reproduction of high frequencies and transient performance the slew rate of the amplifier is doubled. This technology is called Pure Balance®, and is used in both the AT3000 and the AT2000 series; the result is breathtaking. ATI’s Pure Balance® amplifiers keep the signal balanced all the way from the XLR inputs to the speaker outputs.

Note: Sound Approach is an Authorized Dealer for the United States only. Visit for a list of International Dealers.

ATI Amplifier Technologies - AT 3000 Series


Remote Trigger
       Activated from 3.3VDC to 24 VDC via a heavy-duty relay

Protection Circuits
       Optically - coupled with full automatic reset.

Toroid Transformers
       40% more efficient than EI type. Separate bi-filar windings for each channel guaranty lower noise and crosstalk.

Circuit Boards
        Double-sided, FR-4 glass-epoxy, computer-grade boards are assembled in-house.

Soft Start Circuitry
        Ultra soft turn on reduces in-rush current to a minimum. Multiple units can be turned on without tripping circuit breakers eliminating the need for sequencing.

Power Transistors 
        High-current, bi-polar output transistors with active bias circuits result in effortless operation.

Power Cord
        Detachable, 3-wire cord.

7-Year Warranty
        Parts and labor against defects in parts or workmanship.

        17"W X 8.75"H X 18.3"D (chassis)

        88 to 138 lbs (model dependent)



Number of Channels
       2 to 7

EIA 1kHz Output Power at 8 Ohms*
       350 watts

EIA 1kHz Output Power at 4 Ohms*
       450 watts

FTC Full Bandwidth Output Power at 8 Ohms**
       300 watts

FTC Full Bandwidth Output Power at 4 Ohms**
        450 watts

Input Sensitivity for Full Rated Power
         1.8 Volts

Frequency Response at Rated Output
         20Hz to 20kHz ±0.1dB

Phase Response
        +5 to -15 degrees from 20Hz to 20kHz at 1 watt

Signal-to-Noise Ratio “A-Weighted”
        Greater than 120dB below rated FTC Full Bandwidth Power

Total Harmonic Distortion (THD)
        Less than 0.03% at full rated FTC power Less than 0.005% at full EIA power at 1kHz

Intermodulation Distortion (IMD)
        Less than 0.03% at full rated FTC power Less than 0.005% at full EIA power at 1kHz

Load Impedance
        Safe with all types of loads. Rated for 4 to 16 ohms

Power Bandwidth FTC
        +0-3db from 5Hz to 100kHz

Damping Factor
        Greater than 400 from 10Hz to 400Hz

        Greater than –100dB from 20Hz to 20kHz

        Voltage gain of 34dB through RCA jacks, 28dB through XLR jacks

Slew Rate

Input Impedance
        Nominally 28k ohms

Remote Trigger Voltage
         3.3 to 24 Volts DC at 5 millamperes or greater

DC Output Offset
         Less than ±5mV

Power Requirements
         120 VAC (other voltages available on export models)

Chassis Dimensions (W x H x D)
         Inches 17 x 8.5 x 18.3

Net Weight (lbs/kg)
         Model Dependent 76-126/35.29-58.5

Shipping Weight (lbs/kg)
         Model Dependent 88-138/22.73-43.18

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