ATI AT3300 PURE BALANCED POWER AMPLIFIERS
Product Description
ATI AT3300 Pure Balance Series
2 to 8 Channels 330 Watts per Channel
The ATI AT3300 Pure Balance Series is designed for music lovers and home cinema enthusiasts who value authority, refinement, and engineering integrity in equal measure. Powerful yet composed, the AT3300 is a multi-channel amplifier created to bring a sense of scale, control, and effortless realism to serious audio systems.
Available in 2- through 8-channel configurations, the AT3300 delivers 330 watts per channel into 8 ohms, providing the current capability and headroom required for demanding loudspeakers and sophisticated surround installations. Whether reproducing the delicacy of an intimate recording or the full dynamic sweep of a cinematic soundtrack, it does so with a character defined by control, stability, and ease.
At the heart of the AT3300 is ATIs latest Class AB differential amplifier architecture, a design approach chosen for its ability to preserve musical nuance while supplying the grip and authority that larger systems require. Differential output stages, substantial energy storage, and ATIs meticulously executed power supply design work together to create an amplifier that sounds poised, substantial, and quietly confident under load.
A defining element of the series is its use of massive toroidal transformers, supplying 450VA to each channel. This generous power foundation allows the amplifier to maintain full output capability across all channels, giving the AT3300 the ability to reproduce demanding passages with convincing dynamics, low noise, and excellent separation. The effect is not merely power for its own sake, but a greater sense of control, dimensionality, and composure throughout the presentation.
For the listener, that translates into a more convincing sense of space, more stable imaging, and a deeper impression of effortlessness. Front channels retain their weight and presence, while surround and height channels contribute with speed, coherence, and authority, allowing the full system to perform as a unified whole.
ATIs modular amplifier bank design reflects the same thoughtful approach to performance and longevity. Models AT3302, AT3303, and AT3304 are housed in a more compact 13.5-inch depth chassis, while AT3305 through AT3308 incorporate a second toroidal transformer to support higher channel counts in a 16.5-inch depth chassis. This mechanical layout promotes both efficient operation and elegant internal organization.
Thermal stability is equally well addressed. ATIs hybrid cooling system, combined with CPU- and temperature-controlled 140mm fans, ensures continuous, low-noise airflow across each amplifier bank. The result is dependable long-term operation without distracting fan noise or unnecessary mechanical intrusion into the listening environment.
There is a reassuring seriousness to the AT3300 Seriesone that comes not from ornament, but from engineering substance. It is an amplifier built for those who appreciate the difference between mere output and genuine control, between loudness and fidelity, between impressive specifications and lasting musical satisfaction.
For systems that demand both power and refinement, the ATI AT3300 Pure Balance Series offers a distinctly American expression of high-performance amplification: robust, carefully executed, and designed to serve the musicand the systemwith authority and grace.
Features
Remote Trigger Activated from 3.3 VDC to 24 VDC via a heavy-duty relay.
Protection Circuits Optically coupled with full automatic reset.
Toroid Transformers Approximately 40% more efficient than EI-type designs. Separate bi-filar windings for each channel help reduce noise and crosstalk.
Circuit Boards Double-sided, FR-4 glass-epoxy, computer-grade boards assembled in-house.
Soft Start Circuitry Ultra-soft turn-on minimizes in-rush current. Multiple units can be powered on without tripping breakers, reducing the need for sequencing.
Power Transistors High-current, bi-polar output transistors for optimized real-time performance.
Power Supply Capacitance 32,800 μF per channel
Power Cord Single cord (24 channels) Dual cord (58 channels)
7-Year Warranty Parts and labor against defects in parts or workmanship.
Specifications
Number of Channels 2-8
FTC Full Bandwidth Power Output @ 8Ω (Watts RMS) 330
FTC Full Bandwidth Power Output @ 4Ω (Watts RMS) 425
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-Weighted)
125dB
Total Harmonic Distortion + Noise (20Hz - 20kHz) <0.05%
Intermodulation Distortion <0.03%
Recommended Load Impedance Safe for all types of loads. Rated for 4Ω to 16Ω.
Power Bandwidth FTC +0,-3 dB 20Hz - 40kHz
Damping Factor
400
Crosstalk 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
50V/μS
Input Impedance 20kΩ
Output DC Offset Less Than 5mV
Power Requirements 117V/120V AC or 230V/240V AC; 50/60 Hz Factory Configured
Power Consumption (Standby) ≤0.5W
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
Models
ATI AT3302 2-channel amplifier, 330 watts/channel ATI AT3303 3-channel amplifier, 330 watts/channel ATI AT3304 4-channel amplifier, 330 watts/channel ATI AT3305 5-channel amplifier, 330 watts/channel ATI AT3306 6-channel amplifier, 330 watts/channel ATI AT3307 7-channel amplifier, 330 watts/channel ATI AT3308 8-channel amplifier, 330 watts/channel
Made in the U.S.A.
The AT3300 Series is manufactured in Southern California in ATIs 50,000-square-foot facility, where transformer production, circuit board assembly, module testing, and final verification are handled in-house. Each amplifier module and completed unit is tested using computerized Audio Precision equipment, supporting consistent build quality, repeatable performance, and long-term reliability.
2 to 8 Channels 330 Watts per Channel
The ATI AT3300 Pure Balance Series is designed for music lovers and home cinema enthusiasts who value authority, refinement, and engineering integrity in equal measure. Powerful yet composed, the AT3300 is a multi-channel amplifier created to bring a sense of scale, control, and effortless realism to serious audio systems.
Available in 2- through 8-channel configurations, the AT3300 delivers 330 watts per channel into 8 ohms, providing the current capability and headroom required for demanding loudspeakers and sophisticated surround installations. Whether reproducing the delicacy of an intimate recording or the full dynamic sweep of a cinematic soundtrack, it does so with a character defined by control, stability, and ease.
At the heart of the AT3300 is ATIs latest Class AB differential amplifier architecture, a design approach chosen for its ability to preserve musical nuance while supplying the grip and authority that larger systems require. Differential output stages, substantial energy storage, and ATIs meticulously executed power supply design work together to create an amplifier that sounds poised, substantial, and quietly confident under load.
A defining element of the series is its use of massive toroidal transformers, supplying 450VA to each channel. This generous power foundation allows the amplifier to maintain full output capability across all channels, giving the AT3300 the ability to reproduce demanding passages with convincing dynamics, low noise, and excellent separation. The effect is not merely power for its own sake, but a greater sense of control, dimensionality, and composure throughout the presentation.
For the listener, that translates into a more convincing sense of space, more stable imaging, and a deeper impression of effortlessness. Front channels retain their weight and presence, while surround and height channels contribute with speed, coherence, and authority, allowing the full system to perform as a unified whole.
ATIs modular amplifier bank design reflects the same thoughtful approach to performance and longevity. Models AT3302, AT3303, and AT3304 are housed in a more compact 13.5-inch depth chassis, while AT3305 through AT3308 incorporate a second toroidal transformer to support higher channel counts in a 16.5-inch depth chassis. This mechanical layout promotes both efficient operation and elegant internal organization.
Thermal stability is equally well addressed. ATIs hybrid cooling system, combined with CPU- and temperature-controlled 140mm fans, ensures continuous, low-noise airflow across each amplifier bank. The result is dependable long-term operation without distracting fan noise or unnecessary mechanical intrusion into the listening environment.
There is a reassuring seriousness to the AT3300 Seriesone that comes not from ornament, but from engineering substance. It is an amplifier built for those who appreciate the difference between mere output and genuine control, between loudness and fidelity, between impressive specifications and lasting musical satisfaction.
For systems that demand both power and refinement, the ATI AT3300 Pure Balance Series offers a distinctly American expression of high-performance amplification: robust, carefully executed, and designed to serve the musicand the systemwith authority and grace.
Features
Remote Trigger Activated from 3.3 VDC to 24 VDC via a heavy-duty relay.
Protection Circuits Optically coupled with full automatic reset.
Toroid Transformers Approximately 40% more efficient than EI-type designs. Separate bi-filar windings for each channel help reduce noise and crosstalk.
Circuit Boards Double-sided, FR-4 glass-epoxy, computer-grade boards assembled in-house.
Soft Start Circuitry Ultra-soft turn-on minimizes in-rush current. Multiple units can be powered on without tripping breakers, reducing the need for sequencing.
Power Transistors High-current, bi-polar output transistors for optimized real-time performance.
Power Supply Capacitance 32,800 μF per channel
Power Cord Single cord (24 channels) Dual cord (58 channels)
7-Year Warranty Parts and labor against defects in parts or workmanship.
Specifications
Number of Channels 2-8
FTC Full Bandwidth Power Output @ 8Ω (Watts RMS) 330
FTC Full Bandwidth Power Output @ 4Ω (Watts RMS) 425
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-Weighted)
125dB
Total Harmonic Distortion + Noise (20Hz - 20kHz) <0.05%
Intermodulation Distortion <0.03%
Recommended Load Impedance Safe for all types of loads. Rated for 4Ω to 16Ω.
Power Bandwidth FTC +0,-3 dB 20Hz - 40kHz
Damping Factor
400
Crosstalk 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
50V/μS
Input Impedance 20kΩ
Output DC Offset Less Than 5mV
Power Requirements 117V/120V AC or 230V/240V AC; 50/60 Hz Factory Configured
Power Consumption (Standby) ≤0.5W
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
Models
ATI AT3302 2-channel amplifier, 330 watts/channel ATI AT3303 3-channel amplifier, 330 watts/channel ATI AT3304 4-channel amplifier, 330 watts/channel ATI AT3305 5-channel amplifier, 330 watts/channel ATI AT3306 6-channel amplifier, 330 watts/channel ATI AT3307 7-channel amplifier, 330 watts/channel ATI AT3308 8-channel amplifier, 330 watts/channel
Made in the U.S.A.
The AT3300 Series is manufactured in Southern California in ATIs 50,000-square-foot facility, where transformer production, circuit board assembly, module testing, and final verification are handled in-house. Each amplifier module and completed unit is tested using computerized Audio Precision equipment, supporting consistent build quality, repeatable performance, and long-term reliability.
