The REF 5 is the latest model in a series of the finest and most successful line-stage preamplifiers ever made. From the REF1 to the REF2 to the REF3 to the REF5, each one has built upon the legacy of its predecessor as the most sought-after reference level line-stage preamplifier. The REF5 clearly redefines...

The DS450M mono amplifier adds a new level of performance and flexibility to our Definition Series of amplifiers. Providing abundant power, dynamics and control in a compact chassis, the DS450M rounds out the DS amplifier lineup.

There are several reasons to choose the DS450M over its stereo counterpart....

Simply put, the REF150 is a breakthrough in stereo power amplification. Replacing the REF110—which was one of the most respected modern stereo amplifiers—was a daunting task, but it has been accomplished. The REF150 offers more power, greater dynamic thrust, a more vivid and resolved presentation,...

With the introduction of the DS-series amplifiers, Audio Research has proven that high power output, great sound quality, and high efficiency can all come together in a single package. The DS225 adds another chapter to the Definition Series amplifier story, taking the proven format of the DS450 and scaling...