Audio Research D40 Stereo Tube Power Amplifier; Silver

Audio Research D40 Stereo Tube Power Amplifier Highlights

Product: Audio Research D40 Stereo Tube Power Amplifier; Silver

Product SKU: 90390

Serial Number: 61222004

Input Voltage: 120V

Cosmetic Description: Good cosmetic condition with some minor visible cosmetic wear including some light marks on the front handles as well as the top of the tube shroud. Despite these minor blemishes, this amplifier still looks great and sounds wonderful.

What is Included: Power Amplifier, Four Sovtek 6L6WGC Tubes, Two GE 6FQ7 Tubes, Four Mullard 12AX7 Tubes, Two GE 12AT7 Tubes, One Westinghouse 12BH7A Tubes, Manual, Factory Packaging

Functional Notes: Operational condition of this item is excellent, fully tested and no issues found.

Age: 15 years or older

# of Owners: 1

Tobacco Exposure: No

Service History: None

MSRP: $1595

Other Notes: 

"The Audio Research D-40 is a vintage tube stereo power amplifier from the early 1980s, revered for its precision, clarity, and musical transparency. Delivering 35 watts per channel into 16 ohms with less than 1% THD, it produces sharply focused highs, tight bass, and a dynamic midrange that places each instrument with striking accuracy. Designed for audiophiles seeking pure, uncolored sound, the D-40 excels at revealing detail and nuance, offering a sense of space and realism rarely matched by modern amps in its class.

The D-40 features a rugged aluminum chassis, military-grade components, and accessible tube test points for easy maintenance. Its tube complement includes 12AX7s, 6FQ7s, 5881s, 12AT7, and 12BH7s, providing tonal richness and reliability. Benefiting from warm-up period of 2–3 hours for optimal performance, this classic amplifier combines vintage craftsmanship with enduring sonic appeal, making it a prized addition for serious collectors and discerning listeners alike."

Product Specifications

Manual

Shipping: Cost to ship this item within the contiguous United States is a flat rate of $65- including packaging and insurance. For all other locations including Hawaii, Puerto Rico and Alaska, please request a quote prior to purchase. Items with factory packaging will be double boxed. When factory packaging not available re-usable shipping box with custom injected-foam mold will be used. (for all items over 10 lbs). Note that all items valued over $750 will require a signature upon delivery.