Audio Research Reference 750SEL Monoblock Power Amplifier; pair

There are moments in the history of high-end audio that are truly legendary, products that redefine what is possible in the reproduction of music. The Audio Research Reference 750 SEL is one such moment. This is not merely an amplifier; it is a definitive statement, a limited-edition masterpiece built to commemorate Audio Research's 50th anniversary. As the ultimate expression of their five-decade legacy, the REF 750 SEL is a true monoblock amplifier of breathtaking scale and power, dedicating an entire massive chassis to a single channel. By incorporating the most advanced component technologies, a colossal power supply, and an unprecedented eighteen KT150 output tubes per channel, it delivers a level of effortless dynamics, holographic realism, and emotional connection that is simply without peer.

Key Features

• Ultimate Monoblock Design: A pair of massive, individual mono amplifiers for the absolute pinnacle of channel separation, soundstage stability, and dynamic freedom.
• Limited "Special Edition" (SEL): A very limited production run built to celebrate Audio Research's 50th Anniversary, representing the ultimate expression of their design philosophy.
• Colossal Power Output: Delivers a monumental 750 watts of continuous power, capable of driving any loudspeaker in the world with absolute, effortless authority.
• Massive All-Tube Signal Path: The audio circuit features a staggering eighteen KT150 vacuum tubes in the output stage, supported by 6H30 driver tubes, for unparalleled power and grace.
• Flagship Component Technology: Incorporates the most advanced, custom-designed proprietary components, including specialized wiring and coupling capacitors, for the highest level of resolution.
• Dual GhostMeters®: Unique, floating power meters are etched into the faceplate, appearing to hover and providing a beautiful view of the immense power output.
• Redesigned Valved Power Supply: A massive, highly regulated power supply ensures limitless, instantaneous current delivery for breathtaking dynamics.
• Solid-State Rectification: Utilizes solid-state rectification for the ultimate in low-frequency control and authoritative bass performance.
• Selectable Fan Speeds: A quiet, multi-speed fan system integrated into the chassis to ensure optimal operating temperature.
• 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.
• The Pinnacle of ARC Build Quality: Two massive chassis, handcrafted in Minnesota, USA, represent the ultimate expression of Audio Research design and construction.

The Power of a Legacy

The Reference 750 SEL is the culmination of 50 years of continuous research and development in the art of vacuum tube amplification. It is a celebration of a legendary heritage, built in a very limited series for the most discerning music lovers. At its heart is a colossal power supply and an audio circuit of breathtaking scale, featuring eighteen KT150 output tubes per channel. This no-compromise approach results in an amplifier that can deliver a monumental 750 watts of continuous power, allowing it to drive any loudspeaker ever made to its full potential with a sense of boundless, effortless ease that is simply unforgettable.

The Purity of the Monoblock

The ultimate goal of high-end audio is to create a believable, three-dimensional soundstage. The REF 750 SEL achieves this through the uncompromising purity of its monoblock design. By housing the left and right channels in completely separate, massive chassis with their own heroic power supplies, all possibility of inter-channel crosstalk is eliminated. This perfect separation results in a soundstage of breathtaking width, depth, and stability. Instruments and vocalists hang in space with pinpoint accuracy and lifelike scale, allowing you to hear into the recording with a clarity and focus that no other amplifier can match.

A Window Into the Music

Despite its immense size and power, the Reference 750 SEL presents a face of elegant beauty. The iconic front panel features the unique GhostMeter®, a large power meter that appears to float in the center of the faceplate, its needle dancing to the rhythm of the music. This stunning design is more than just an aesthetic choice; it’s a statement about the transparency and purity of the sound within, a visual representation of the immense dynamic energy being unleashed.

A Statement in Craftsmanship

The Reference 750 SEL is the pinnacle of Audio Research's five-decade legacy of craftsmanship. Each of the two massive chassis is meticulously assembled by hand in Minnesota, USA, undergoing the most rigorous testing and quality control. The flawless finish of the classic brushed aluminum faceplates and the robust, anti-resonant construction are a testament to its "built-for-a-lifetime" philosophy. This is not simply a component; it is an heirloom-quality instrument designed to be the unchanging, authoritative heart of a world-class audio system for generations to come.

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