Audio Research D-115 Tube Amplifier


Here is your chance to own a classic tube amplifier at a reasonable price.

The D-115 delivers 100W using eight KT77 tubes (it actually measured closer to 115W before clipping) while maintaining the traditional warm and precise Audio Research signature sound.

This is a well-built American made unit, not a recent Chinese attempt at HiFi, weighing in at 68 lbs.  It is made from the highest quality components available at the time and was hand assembled with care and attention in their Minneapolis factory.

Condition is superb for an amplifier of this age. The paint is very clear with no noticeable scratches or dents. The faceplates are also very clean. There is no rust of signs of exposure to moisture anywhere.

The unit was bench tested carefully and it passed with flying colors. All tubes were tested and all capacitors were inspected and tested for leakage. It was driven to its full power rating while monitoring distortion without hiccups. It then was moved to our listening room where it powered our vintage B&W Matrix 801’s with authority and precision and made a really nice and pleasant combination.

Included is the amplifier with a printed owner's manual and the original box.

Click here for a PDF copy of the D-115 Owner's Manual

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.



Original Box



Online & Printed





Physical Condition


Working Condition


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