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ATI Amplifier Technologies - AT 1800 Series - Stereo Amplifier

ATI Amplifier Technologies - AT 1800 Series - Multi-Channel Stereo Amplifier
ATI Amplifier Technologies - AT 1800 Series - Multi-Channel Stereo Amplifier ATI Amplifier Technologies - AT 1800 Series - Multi-Channel Stereo Amplifier

ATI Amplifier Technologies Inc.

ATI Amplifier Technologies - AT 1800 Series - Multi-Channel Stereo Amplifier 

Available in six configurations, the AT1800 series shares many attributes with is larger siblings: AT2000 and AT3000 series'.  Because of the large heat sinks that cool the amplifier, there are no cooling fans which allows for perfect listening without any fan noise.  In the case of an overload situation an optically-couples protection circuit automatically shuts down the amplifier.  The conditions are checked every ten seconds once a protection circuit is engaged and output is automatically restored once the overload situation has been remedied.  There is no direct electrical connection because the protection circuit is optically coupled to the audio circuit.  This allows for protection without compromising the sound quality.  

The need for cumbersome fuses is eliminated with a provided magnetic circuit breaker with also provides further protection. The AT1800-series amps use the same transformer construction as the top-of-the-line AT3000 and AT2000 series amps: MOH cores with bifilar windings, built in our own factory.  Powder-coated chassis and double-sided glass epoxy circuit boards are used in all ATI products.  Most high power amplifiers draw a tremendous inrush of electrical current when turned on.  The AT1800-series amplifiers do not due its Ultra Soft Turn-On Circuit.  The circuit power the amplifier on gradually to ease the load of household circuits.  The amplifier is turned on and off via included trigger input.

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

ATI Amplifier Technologies Inc.


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 7"H X 16"D (plus 1" for I/O jacks)

        57 to 95 lbs (model dependent)



Number of Channels
        2 to 7

EIA 1kHz Output Power at 8 Ohms*
        210 watts

EIA 1kHz Output Power at 4 Ohms*
        315 watts

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

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

Input Sensitivity for Full Rated Power
        1.6 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 28dB

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 7 x 16.5

Net Weight (lbs/kg)
        Model Dependent 50-93/22.73-42.27

Shipping Weight (lbs/kg)
        Model Dependent 62-105/28.79-48.75


Owner's Manual

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