AT3303 (PZA)
2 to 8 channels - 330 watts/channel
Amplifier Technologies has developed a powerful multi-channel amplifier capable of delivering astonishing performance for both music and movie experiences. The AT3300 Pure Balance amplifier series delivers 330 watts per channel into 8 ohms and is available in 2- to 8-channel models. Featuring toroidal transformers and differential output stages, the AT3300 Series utilizes ATI’s Hybrid Cooling System to keep the amplifier operating safely under the most demanding conditions.
The ATI Pure Balance Series are robust, differentially designed amplifiers that incorporate significant power supplies to ensure maximum power to all channels as the demands of cinematic and listening sound are placed on the amplifier. The ATI Pure Balance series of amplifiers has been designed with ATI's latest approach to our Class AB differential amplifier design. Massive toroidal power transformers deliver 450 VA to each channel of the AT3300 Series amplifiers to provide full power handling to all channels for the best sound experience your speaker system can deliver. Delivering up to 330 watts to all channels, not only will the front main LCR speakers deliver power and dynamics, but all surround and height channel speakers will be ready for stunning, instant surround sound effects and realism.
By employing a modular amplifier bank approach to the output channels, the AT3300 amplifiers are designed for efficient and powerful performance up to 4 channels in a compact 13.5" deep chassis for the AT3302, AT3303 and AT3304 models. In these models, up to 4 channels can be located on one side of the amplifier's internal chassis for cooling efficiency. Where higher 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 to 8 as in the AT3305, AT3306, AT3307 and AT3308 models in a 16.5" deep chassis.
This efficient internal mechanical design creates a cooling tower for all channels. A 140mm (5.5 inch) temperature-controlled CPU and computer fan located in each amplifier bank ensures continuous, quiet airflow cooling.
Characteristics:
Remote shutter release
Activated from 3.3 VDC to 24 VDC by a heavy duty relay.
Protection circuits
optically coupled with full auto reset.
Toroidal Transformers
40% more efficient than type EI. Separate bifilar windings for each channel ensure lower noise and crosstalk.
Circuit boards The boards
Double-sided, computer-grade FR-4 glass epoxy, assembled in-house.
Soft start circuit The
Ultra-soft turn-on reduces inrush current to a minimum. Multiple units can be turned on without tripping circuit breakers, eliminating the need for sequencing.
Power transistors
High-current bipolar output transistors ensure optimized real-time performance.
Power supply capacitance
32,800 μF (microfarads) per channel.
Power cable
Single cable (2-4 channels) Double cable (5-8 channels).
7-year warranty
Parts and labor against defects in parts or workmanship.
Specs:
Number of channels
2-8
FTC Full Bandwidth Power Output @ 8 Ω (Watts RMS)
330
FTC Full Bandwidth Power Output @ 4 Ω (Watts RMS)
425
Input sensitivity for full rated FTC output power: 8 Ω
2.01 volts
Frequency response
+0,-0.5dB 20Hz - 20kHz
Phase response
+5° to -15°, 20 Hz - 20 kHz at 1 W
Signal-to-noise ratio (nominal power ref. FTC, A-weighted)
>125 dB
Total harmonic distortion + noise (20 Hz - 20 kHz)
<0.05%
Intermodulation distortion
<0.03%
Recommended load impedance.
Safe for all types of loads. Rated for 4Ω to 16Ω.
FTC power bandwidth
+0.-3 dB 20Hz - 40kHz
Damping factor
>400
Crosstalk in
Adjacent channels: better than -80 dB from 200 Hz - 10 kHz
Skipped channels: better than -90 dB from 200 Hz - 10 kHz
Bank-to-bank channels: better than -100 dB from 200 Hz - 10 kHz
Voltage Gain (RCA Inputs)
28.2 dB ±0.2 dB
Voltage gain (XLR inputs)
28.2 dB ±0.2 dB
Spin speed
>50 V/μS
Input impedance
20kΩ
Output DC compensation
less than ±5 mV
Power Requirements
117V/120VAC or 230V/240VAC; 50/60 Hz factory configured
Power consumption (standby)
≤0.5 W