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Audio Research D40 Tube Power Amplifier

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Original price $1,595.00 (25% Off Est. Retail)
Original price From $1,199.00
Original price $1,595.00 (25% Off Est. Retail)
Current price $1,199.00
From $1,199.00
Current price $1,199.00

+$65.00 Shipping to contiguous US.
Tax collected at checkout.

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Product Highlights

Output Wattage: 35 watts per channel minimum continuous. The Audio Research D40 is a vintage vacuum tube power amplifier engineered for absolute musical accuracy. Adhering to a streamlined design philosophy, it pairs patented cross-coupled, fully balanced circuitry with a well-regulated 100-joule power supply for a wide musical bandwidth. Its military-grade, two-sided circuit board provides optimal signal transfer and easy servicing. To maximize lifespan, the push-pull output tubes run at 70 percent of their dissipation rating, while an automatic, self-compensating floating bias ensures a smooth response despite line voltage fluctuations.

Audiophiles praise the D40 as a phenomenal tube amplifier, celebrating its holographic, three-dimensional soundstage and exceptional midrange clarity. Reviews emphasize its lush, organic sonic profile, noting that it delivers a level of transparency and musical depth that solid-state alternatives fail to match. Listeners consistently highlight its ability to reveal fine textures and a pristine treble, making extended listening sessions completely engaging and free of fatigue.

Integrating this masterpiece into an audio system connects classic craftsmanship with exceptional performance. Its rugged aluminum chassis and premium components ensure enduring reliability. Finding a component that honors the natural timbre of music while maintaining superb control can be a challenge, but incorporating this timeless amplifier brings authentic high-definition tube warmth and lifelike presence directly into your home.
Brand Audio Research
Type Power Amplifiers
MSRP $1,595.00
SKU # 96354
Serial # 61222004
Cosmetic Rating

7 - 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.

Functional Notes

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

Age 15 years or older
Owners 1
Service History None

Power Amplifier, (4x) Sovtek 6L6WGC Tubes, (2x) GE 6FQ7 Tubes, (4x) Mullard 12AX7 Tubes, (1x) GE 12AT7 Tubes, (1x) Westinghouse 12BH7A Tubes, Manual, Factory Packaging

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