Audio Research Reference 80S Stereo Power Amplifier

For many, the dream of owning an Audio Research Reference amplifier represents the pinnacle of the audiophile journey. The Reference 80S makes that dream an attainable reality. This is not a scaled-down version, but a concentrated distillation of the sonic soul and engineering prowess found in its larger, more costly siblings. The REF 80S is an all-tube, pure Class-A/B stereo amplifier built around a quartet of KT150 output tubes, delivering a potent 70 watts per channel with breathtaking transparency, holographic imaging, and a dynamic realism that is pure Audio Research. Featuring a proprietary auto-bias circuit and the stunning new GhostMeters®, it combines flagship performance with user-friendly operation, all handcrafted in Minnesota, USA.

Key Features

• Pure All-Tube Signal Path: A meticulously designed vacuum-tube circuit featuring KT150 output tubes and 6H30 driver tubes for a rich, natural, and powerful sound.
• Potent 70 Watts Per Channel: A robust power output capable of driving a wide variety of loudspeakers with authority and grace.
• Proprietary Auto-Bias Circuit: A smart, self-adjusting bias circuit constantly monitors and corrects for tube wear, ensuring peak performance without any user intervention.
• Switchable Triode-Pentode Modes: A front-panel switch allows you to choose between the full power of Pentode mode (70W) or the rich, nuanced presentation of Triode mode (35W).
• Dual GhostMeters®: Stunning new meters that provide a floating, three-dimensional view of the output tubes' power delivery, while also showing their bias status.
• Selectable Fan Speeds: A quiet, three-speed fan system allows you to tailor the cooling to your environment and listening levels.
• Comprehensive Tube Monitoring: An integrated tube hour meter allows for easy tracking of tube usage.
• Single-Ended and Balanced Inputs: Features both single-ended (RCA) and balanced (XLR) inputs for universal preamplifier compatibility.
• Separate 4, 8, and 16-Ohm Taps: Dedicated speaker output taps ensure a perfect impedance match for any loudspeaker, maximizing power transfer and performance.
• Classic Audio Research Build: Housed in the iconic chassis with a brushed aluminum faceplate and sturdy handles, all handcrafted in Minnesota, USA.
• Four-Layer Circuit Board: Utilizes a four-layer circuit board to minimize noise and ensure the shortest possible signal path for ultimate purity.

The Sonic Heart of a Reference Amplifier

The soul of the REF 80S resides in its magnificent, all-tube audio circuit. The output stage is built around a matched quad of KT150 vacuum tubes—the most powerful and stable output tube in its class—supported by 6H30 driver tubes. This combination, a hallmark of modern Audio Research design, results in a sound that is incredibly powerful and dynamically explosive, yet capable of resolving the most delicate musical nuances. It delivers the vast, holographic soundstage, rich tonal colors, and grain-free transparency that have made the Reference series the benchmark for musical realism.

Intelligent, Effortless Performance

The Reference 80S is designed for the music lover who wants ultimate performance without the hassle of constant adjustments. At its core is a proprietary auto-bias circuit that is a marvel of engineering. This intelligent system constantly monitors the KT150 output tubes, automatically and precisely adjusting their bias in real-time to compensate for tube wear and fluctuations in your home's power line. This ensures that the amplifier is always operating at its absolute peak performance, day in and day out, without you ever having to touch a multimeter or a screwdriver.

A Window to the Music

The front panel of the REF 80S is a work of art, featuring the stunning new GhostMeters®. These unique meters are designed to appear as if they are floating in front of the vacuum tubes, providing a beautiful, three-dimensional view of the amplifier's power output. More than just a visual delight, the meters are also a functional tool, allowing you to see the bias status of the KT150 tubes. This fusion of aesthetic beauty and practical function is a perfect representation of the Audio Research philosophy.

Power and Finesse on Command

The REF 80S is a remarkably versatile amplifier, capable of adapting to your speakers, your music, and your mood. A simple front-panel switch allows you to change the amplifier's operation between two distinct modes. In Pentode mode, it delivers the full, authoritative 70 watts per channel, perfect for driving demanding speakers or for listening to large-scale orchestral music. Switch to Triode mode, and the amplifier delivers 35 watts of pure, harmonically rich sound, ideal for more intimate recordings, vocals, and high-efficiency speakers.

The Listening Room Difference

When you shop with The Listening Room, you get more than just gear. As a third-generation, family-run business with a passion for music and decades of experience, we offer personalized service that goes far beyond the sale. Call, text, or email, and you’ll get a real human who knows this equipment inside and out. From in-store demos to curated home system design and wide-radius delivery, we’re here to help you get the absolute best out of your purchase.

Specifications