ATI Amplifiers

built to Perform, Built to last

At Amplifier Technologies Inc. (ATI), precision engineering meets robust construction to create amplifiers designed for exceptional sound and lasting performance. Proudly made in the USA, every ATI amplifier is crafted at their Los Angeles factory using a combination of meticulous hand-assembly and advanced automation. With no shortcuts or compromises, ATI amplifiers deliver state-of-the-art audio for both home and commercial systems.

ATI Amps in an assembly line at the ATI Facility in Los Angeles California

Made in the USA

ATI amplifiers are meticulously assembled at their 50,000-square-foot factory in Los Angeles, California, using a blend of careful hand-built techniques and advanced automation. Every unit undergoes rigorous quality control, including listening and performance testing, to ensure consistent precision and reliability.

Independent Power Supplies for Each Channel

ATI amplifiers use toroidal transformers with bifilar winding, ensuring efficient power distribution and reduced distortion. Each channel gets its own rectifier and capacitors for consistent performance, even during the most dynamic audio moments.

ATI Amps Toroidal Transformer construction
ATI Amplifiers Advanced Cooling heat sink designs - images showing 4 amps head sinks

Advanced Cooling Design

Built with substantial heat sinks for each channel, ATI amplifiers are designed to run quietly and as cool as possible. The result is an amplifier that minimizes noise, enhancing the listening experience, while operating efficiently for a longer lifespan.

Reliable Circuit Boards

ATI amplifiers use double-sided FR-4 glass epoxy circuit boards for superior performance and durability. These boards handle twice the electrical current of single-sided boards, ensuring solid, reliable connections to the components. Each solder joint secures the components across both surfaces of the board and within the insertion holes, significantly reducing the risk of failures caused by bad connections or cold-solder joints. To maintain consistent performance, ATI employs high-quality metal-film resistors with a 1-percent tolerance in all gain stages, ensuring every circuit board operates with consistency and reliability.

ATI Amplifiers double-sided FR-4 Glass epoxy circuit boards
Gold Plated RCA and XLR connectors on the back of an ATI amplifier

Gold-Plated RCA and XLR Connectors

Chassis-mounted for durability, ATI’s premium connectors provide secure, reliable connections for audiophile-grade performance.

Advanced Protection Circuits

ATI amplifiers are equipped with lightning-fast, optically-coupled protection circuits, carefully designed to remain completely outside the signal path, ensuring they have no impact on sound quality. These circuits monitor for electrical issues such as speaker or wiring “shorts” and sudden electrical “spikes.” When triggered, the system instantly disengages the output to prevent damage, then rechecks the affected circuitry every 10 seconds. Once the issue is resolved, the amplifier automatically resumes normal operation. This intelligent design minimizes downtime and ensures your amplifier is ready to perform, even in the most critical moments—like hosting a home theater night with friends and family.

ATI Amplifiers - Protection circuit

 

Audioholics Logo

“The ATI AT6000 series amplifier performance is as massive as its dimensions and weight; and yet, completely silent.”

 

 

Secrets of Home Theater and High Fidelity Logo Black

“The ATI AT6002 is completely fitting of its Signature Series designation. It is a giant in the world of power amplifiers.”

 

Stereophile Logo

“I am completely taken with ATI’s AT543NC. It seemed to do everything right, and didn’t get in the way while communicating the elements and the spirit of the music.”

ATI Amplifiers at Archer High Fidelity

Explore the featured types of ATI amps we offer

ATI - 54X Series Power Amplifiers

AT54X Series

$2395-5795

✅ Hypex N-Core® Class D amplifier topology

✅ Linear power supplies

✅ Automatic AC power recognition

✅ Microprocessor controlled soft-start turn-on

  • 500W per channel
  • Differential bridged output modules
  • 1 to 4 channel models
  • 3RU 5.25” rack mount, 6” standard height

AT52X Series

$2395-5795

✅ Hypex N-Core® Class D amplifier topology

✅ Linear power supplies

✅ Automatic AC power recognition

✅ Microprocessor controlled soft-start turn-on

  • 200W per channel
  • 2 to 8 channel models
  • 3RU 5.25” rack mount, 6” standard height
ATI 52X Series Amplifiers
ATI Class AB Ampliers 1820

AT1820

Class AB Amplifiers

$1795-3895

Soft Turn-On Protection: Gradually powers up the amplifier to prevent circuit breaker trips or dimming lights during startup.

Precision Inputs and Outputs: Each channel includes RCA unbalanced and XLR balanced inputs, a selection switch, and gold-plated 5-way binding post outputs.

Toroidal Transformers: High-efficiency MOH cores with bifilar winding provide clean, reliable power with reduced distortion.

Independent Power Supplies: Each channel is supported by its own rectifier and capacitors, ensuring consistent performance even under heavy loads.

Durable Construction: Built into a robust 4RU chassis with a shipping weight ranging from 51 to 107 lbs, depending on the model.

Convenient Features: Includes a +12V trigger, chassis ground lug, fuse holder, and IEC 20 Amp power inlet.

Universal Power Cord Options: Supplied with a detachable power cord compatible with USA, UK, and EU outlets.

ATI Signature Series 4000 amplifier front view

AT4000 – Class AB

Signature Series Amplifiers

$3495-6795

✅ Current Feedback Balanced Class AB topology

✅ Dual DC Servos

✅ Dual-Differential Gain Stage

  • 200W per channel 8Ω, 300W per channel 4Ω
  • 12 output devices per channel
  • 46,200uF power supply capacitance per channel
  • 4RU 7.00” rack mount, 8.00” standard height

AT6000 – Class AB

Signature Series Amplifiers

$3495-6795

✅ Current Feedback Balanced Class AB topology

✅ Dual DC Servos

✅ Dual-Differential Gain Stage

  • 300W per channel 8Ω, 450W per channel 4Ω 
  • 16 output devices per channel
  • 59,400uF power supply capacitance per channel
  • 5RU 8.75” rack mount, 9.75” standard height
ATI Signature Series 6000

 

Experience the Performance of ATI Amplifiers

Visit Archer High Fidelity in Falls Church, VA, to explore these exceptional models in person or schedule an appointment with our experts today.

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ATI Signature Series 6000 transparent BG