STR Amplifier

The Definitive Flagship Power Amplifier

The STR Power Amplifier is the beating heart of a world-class sound system, a statement in unwavering performance. As our flagship power amplifier, it is engineered to deliver immense power and audiophile-quality output in a single, elegantly designed component.
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Designed, engineered, and Crafted in Canada, the STR Power Amplifier delivers 400 Watts/channel into 8 ohms, 600 Watts/channel into 4 ohms, and a staggering 800 Watts/channel into 2 ohms—all with both channels driven. This is true no-holds-barred performance, providing immense headroom and effortless dynamics.
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Inside, a true dual-mono design with two colossal transformers and multiple high-current output devices ensures the most subtle details and dynamic peaks are handled with equal authority. Outside, its beautifully designed cosmetics—including a 7-inch graphic control display and secure, highly conductive audiophile connectors—make it a perfect sonic and visual match for the STR Preamplifier.

Unwavering Power and Performance

The STR Power Amplifier is a statement in unwavering performance, engineered to deliver immense power with absolute precision. It is a true powerhouse, capable of delivering 400 watts/channel into 8 ohms and 600 watts/channel into 4 ohms—all with both channels driven. At its peak, it provides a staggering 800 watts/channel into 2 ohms, ensuring true, no-holds-barred performance that effortlessly drives even the most demanding loudspeakers with complete authority.

A Statement in Design and Engineering

The STR Power Amplifier is a statement in both sound and design. Its luxurious and elegant contemporary aesthetic, including a striking 7-inch graphic control display and secure, highly-conductive audiophile connectors, provides a perfect visual and functional match for the STR Preamplifier.

The Purity of Dual Mono

The pursuit of sonic purity led to one conclusion: a true dual-mono design. The STR Power Amplifier features two colossal, independently-wound toroidal transformers—one for each channel. This meticulous engineering choice provides each channel with its own dedicated, uninterrupted power source, ensuring absolute channel separation and complete freedom from interference. The result is unyielding power, unwavering stability, and a soundstage with pin-point accuracy and stunning realism.

Soft Turn-On

The STR Power Amplifier incorporates a sequence-controlled soft turn-on to meticulously manage in-rush current. This deliberate engineering choice protects your electrical system and ensures your circuit breakers remain untripped, guaranteeing flawless system startup every time.

Soft Turn-On

No Rail Fuses

The amplifier sections are Direct Connected to the power supply capacitor bank, a deliberate engineering choice that keeps output impedance remarkably low while making more power instantly available. This design allows the STR Power Amplifier to effortlessly drive even the most demanding or complex speaker loads with complete authority, resulting in audibly superior performance.

No Rail Fuses

Power On/Off Options

The STR Power Amplifier takes power management to a new level of intelligence. It combines trigger mode and audio signal sensing, allowing the amplifier to automatically turn on and off based on your system's activity. This eliminates the need for manual operation, providing seamless integration and unparalleled convenience—especially when using a preamp with Home Theater Bypass mode in a unified home theater and stereo system.

Power On/Off Options

Sixteen Bipolar Output Devices Per Channel

To achieve absolute command over any loudspeaker, Anthem engineers incorporated sixteen bipolar output devices per channel. This meticulous design provides effortless, instantaneous peak production that confidently handles even the most challenging material. The use of multiple bipolar devices in a Class AB configuration dramatically reduces distortion while ensuring extreme linearity, extensive bandwidth, and long-term, stress-free reliability.

Cascoded Complementary Feedback Input Stage

The STR Power Amplifier benefits from our proprietary input topology—a unique departure from the classic differential input stage. Eight low-noise bipolar input devices are meticulously configured in a complementary active-load cascoded feedback arrangement, an engineering choice that results in reduced distortion, exceptionally linear response, and superior bandwidth. To ensure the lowest possible distortion, all transistors in critical stages are hand-selected and matched, preserving every last detail of the music.

Intelligent Protection, Uncompromised Sound

We believe in protecting your investment without ever compromising on performance. The STR Power Amplifier incorporates our proprietary Advanced Load Monitoring (ALM™) technology, a state-of-the-art system that continuously monitors temperature, current, and voltage to ensure peak performance and long-term reliability. Unlike conventional protection circuits, ALM is non-invasive, meaning it only engages under extreme conditions. This allows the amplifier to deliver its full dynamic potential without any audible interference, providing you with a sound that is as transparent as it is dynamic.

Made in Canada

Engineered and manufactured with a defiant, independent spirit, the STR Integrated Amplifier is proudly Made in Canada. Our commitment to local design and production allows our engineers to maintain absolute control over every detail, ensuring the final product delivers an experience defined by uncompromising quality and performance.

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Engineered for Synergy:
A Definitive Partnership

The STR Preamplifier and STR Power Amplifier are a symbiotic pair, engineered to elevate each other. The preamp's meticulously pure signal is handed off to the power amp, which provides immense, clean power to effortlessly drive any loudspeaker. This synergy creates a cohesive system where every engineering choice is made to preserve signal integrity. The result is a level of realism and emotional connection that is simply unattainable with separate, unmatched components. Together, they are a complete, definitive system, crafted in Canada to deliver the pinnacle of high-fidelity performance.

The Anthem Advantage

Drawing on our decades of hands-on design and innovative audio engineering, Anthem products deliver an unparalleled level of reliability and functionality. This isn't just about features; it's about a relentless focus on a superior performance-to-price ratio that sets the industry standard. This is the reason Anthem electronics are the definitive choice for audiophiles, professional musicians, and engineers worldwide.

STR Amplifier

The STR Power Amplifier is the beating heart of a world-class 2-channel sound system. It delivers massive power generation, with audiophile-quality output in a smartly designed component. Designed, engineered, and Crafted in Canada, the STR Power Amplifier delivers 400 Watts/channel into 8 ohms with both channels driven, a massive 600 Watts/channel into 4 ohms (both channels driven) and 800W in 2 ohms, for true no-holds-barred performance.

Further details are available on our Product Support page.
Please note that Anthem may change product specifications as part of ongoing research and development. Errors and omissions excepted.