Audio Research LS-2: Pure Class A Tube Preamplifier with Modern Touchscreen Control

Audio Research returns to its roots with the Audio Research LS-2, a tube preamplifier that deliberately strips away modern excess in favor of a single, clearly defined goal: musical integrity. This is not a nostalgic throwback, nor a feature-packed control center meant to impress on paper. The LS-2 is a modern interpretation of Audio Research’s classic line-stage philosophy, refined for today’s high-resolution systems and listeners who value coherence over complexity.

The all-tube design in Class A operation completely eliminates semiconductors in the signal path and aims for maximum sonic authenticity

At its core, the LS-2 is a pure tube preamplifier operating in full Class A, with no semiconductors anywhere in the signal path and no global negative feedback. Audio Research’s approach here is unapologetically purist. Rather than correcting errors after the fact, the circuit is engineered to behave linearly from the outset, preserving dynamics, spatial cues, and tonal balance without editorializing the music. The result, according to the manufacturer, is a presentation that feels immediate and organic, yet tightly controlled—designed to disappear into the system rather than announce itself.

Audio Research focuses on a clearly defined concept: a fully tube-based preamplifier in pure Class A operation, emphasizing sonic coherence, dynamic stability, and organic reproduction.

The signal path is built around a pair of 6H30 double triodes, tubes long favored by Audio Research for their high current capability, stability, and consistency in demanding applications. The LS-2 runs these tubes in a cathode follower configuration, keeping output impedance low and ensuring easy compatibility with a wide range of power amplifiers and cable lengths. A fully balanced architecture further improves noise rejection, making the LS-2 equally comfortable in real-world listening rooms and complex high-end setups.

At its core is a fully tube-based signal path, implemented without any negative feedback. According to the manufacturer, this design enables a particularly immediate, dynamic, and spatially realistic reproduction, as distortion is minimized not through post-processing corrections, but through meticulous circuit design.

While the audio circuit remains resolutely traditional, the user experience is unmistakably modern. A newly developed touchscreen replaces rows of buttons and cryptic displays, offering clear volume readouts and intuitive control over input naming, display brightness, and color themes. Inspired by Audio Research’s Reference “Ghost Meter” aesthetic, the display blends seamlessly into the brand’s visual language without feeling out of place in either classic or contemporary systems.

One of the LS-2’s most forward-looking aspects is its modular expandability. Buyers can opt for an integrated DAC and phono stage, allowing the preamplifier to serve as the central hub of both analog and hybrid systems. Whether paired with digital streamers, traditional line-level sources, or a turntable, the LS-2 can be configured to match the listener’s priorities while keeping signal paths short and system complexity under control.

In addition to balanced and unbalanced inputs and outputs, it features a newly developed touchscreen display that not only shows the volume but also allows input naming, display brightness, and color selection.

Physically, the LS-2 looks exactly like what it is: an Audio Research component. The chassis is solid, understated, and purpose-built, avoiding unnecessary ornamentation in favor of durability and functional clarity. Available in black or silver, it fits naturally into a wide range of high-end systems without demanding visual attention.

The Audio Research LS-2 is now available through authorized dealers. The base version is priced at $11,300 USD, while the fully equipped model with integrated DAC and phono stage comes in at $12,400 USD. In a market increasingly dominated by multifunction digital control centers, the LS-2 stands out by doing less—but doing it with conviction.