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ATI Amplifier Technologies - AT3300 Series - Class AB Power Amplifier is available to buy in increments of 1

ATI Amplifier Technologies - AT3300 Series - Class AB Power Amplifier

ATI Amplifier Technologies Inc.

ATI Amplifier Technologies - AT3300 Series - Class AB Power Amplifier


Amplifier Technologies have developed a powerful multi-channel amplifier capable of astounding performance for music and cinema experiences. The AT3300 Pure Balance Series amplifiers deliver 330W per channel at 8 ohms and are available from 2 to 8 channel models. Featuring toroidal transformers and differential output stages, the AT3300 Series utilize ATI’s hybrid cooling system to keep the amplifier safely operating under the most demanding conditions.

ATI Pure Balance Series are robust, differential design amplifiers incorporating substantial power supplies to ensure maximum power to all channels as listening and cinematic sound demands are placed upon the amplifier. The ATI Pure Balance Series amplifiers have been designed with ATI’s latest approach to our Class AB differential amplifier design. Massive toroidal power transformers supply 450VA to each channel of the AT3300 series amps to provide full power capability to all channels for the greatest sonic experience that your speaker system can deliver. By offering up to 330W to all channels, not only are the front main L-C-R speakers performing with power and dynamics, all surround and height channel speakers will be ready for astonishing instantaneous immersive sound effects and realism.

Employing a modular amplifier bank approach to output channels; AT3300 amps are designed for efficient and powerful performance up to 4 channels on a compact 13.5” depth chassis for models AT3302, AT3303 and AT3304. In these models, up to 4 channels may be located at one side of the amplifier’s internal chassis for cooling efficiency. When increased channel counts are required such as 5 to 8 channels, a second toroidal transformer is incorporated to power the additional modular amplifier bank for channels 5-8 as in models AT3305, AT3306, AT3307 and AT3308 on a 16.5” depth chassis.

With this efficient internal mechanical design, a cooling tower for all channels is achieved. A CPU and temperature controlled 140mm (5.5”) computer fan positioned at each amplifier bank ensures continuous and quiet airflow cooling. The fan noise should be inaudible. Noise floor in a typical residential room is 40-45 dB. At its highest speed, the fan is 25dB (well below the noise floor of the room). At its normal speed, the fan is an astonishingly quiet 12dB.

These fans aren't prone to malfunction but they cannot avoid collecting dust over time (they're moving air). It wouldn't hurt to "pop the hood" and inspect the fan for dust every few years (depending on environment).

Note: We can only ship to addresses within the USA. Visit for a list of International Dealers.

ATI Amplifier Technologies - AT52x NC 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 insure optimized performance in real-time.
  • Power Supply Capacitance
    32,800 µF (microfarads) per channel.
  • Power Cord
    Single cord (2-4 Channels) Dual cord (5-8 Channels).
  • 7-Year Warranty
    Parts and labor against defects in parts or workmanship.


Number of Channels

FTC Full Bandwidth Power Output@ 8Ω (Watts RMS)

FTC Full Bandwidth Power Output@ 4Ω (Watts RMS)

Input Sensitivity for Full Rated FTC Output Power - 8Ω
2.01 Volts

Frequency Response
+0,-0.5dB 20Hz - 20kHz

Phase Response
+5° to -15°, 20Hz - 20kHz @ 1W

Signal-to-Noise Ratio (Ref FTC Rated Power, A-Wtd)

Total Harmonic Distortion + Noise (20Hz - 20kHz)

Intermodulation Distortion

Recommended Load Impedance
Safe for all types of loads. Rated for 4Ω to 16Ω.

Power Bandwidth FTC
+0,-3 dB 20Hz - 40kHz

Damping Factor

Adjacent Channels - Better than -80dB from 200Hz - 10kHz
Skipped Channels - Better than -90dB from 200Hz - 10kHz
Bank to Bank Channels - Better than -100dB from 200Hz - 10kHz

Voltage Gain (RCA Inputs)
28.2dB ±0.2dB

Voltage Gain (XLR Inputs)
28.2dB ±0.2dB

Slew Rate

Input Impedance
20k Ohms

Output DC Offset
Less Than ±5mV

Power Requirements
117V/120V AC or 230V/240V AC; 50/60 Hz Factory Configured

Power Consumption (Standby)

Power Consumption (Idle/Max)
Two Channel Amplifier Bank: 50W / 1440W
Three Channel Amplifier Bank: 70W / 1800W
Four Channel Amplifier Bank: 90W / 2400W

Chassis Dimensions (W x H x D) inches
AT3302 to AT3304: 17" x 9 3/4" x 14 5/8"
AT3305 to AT3308: 17" x 9 3/4" x 17 5/8"

Chassis Dimensions (W x H x D) millimeters
AT3302 to AT3304: 432 x 248 x 372
AT3305 to AT3308: 432 x 248 x 448

Net Weight (lbs/kg)
AT3302: 47.6 / 26.7
AT3303: 54 / 24.5
AT3304: 61 / 27.7
AT3305: 80.6 / 36.7
AT3306: 87 / 39.6
AT3307: 94.0 / 42.7
AT3308: 101 / 45.9

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