The preamplifier is the heart of any high-performance audio system, the crucial component that routes signals, provides gain, and, most importantly, engages the listener. The Audio Research LS28SE is a line stage preamplifier that performs these duties with exceptional musicality, transparency, and control. As a Special Edition (SE) model, it inherits the latest component technologies and wiring from Audio Research's flagship Reference series, elevating its performance to a stunning new level. Built around a pure Class-A, all-tube analog circuit, the LS28SE delivers the holographic soundstage, rich tonal color, and dynamic realism that have made Audio Research a legend. It is the perfect, versatile, and user-friendly command center for the music lover who demands an immersive and emotionally profound connection to their music.

Main Features

- Pure Class-A, All-Tube Circuit: The analog circuit features four 6H30 vacuum tubes in a pure Class-A, zero-feedback design for the most natural and musically engaging sound.

- Special Edition ( SE ) Upgrades: Incorporates the same proprietary gold coupling caps and special internal wiring found in the flagship Reference 6SE, resulting in dramatically improved resolution and transparency.

- Versatile Inputs & Outputs: A complete suite of connectivity, including 4 x balanced ( XLR ) & 4 x  single-ended ( RCA ) inputs, plus two balanced and two single-ended outputs.

- Home Theater Pass-Through: A discrete, processor pass-through input allows for easy integration into a high-end home theater system without compromising two-channel performance.

- Intuitive Front Panel Control: A large, clear vacuum-fluorescent display and soft-touch buttons provide easy access to all functions, including input naming, tube hours, and auto shutdown.

- Robust, Regulated Power Supply: Features a low-noise R-core power transformer and a robust, highly regulated power supply for pure, stable power to all circuits.

- Built-in Tube Hour Meter: An integrated timer tracks the usage of the vacuum tubes, making it easy to know when it's time for a replacement set.

- Classic Audio Research Build: Housed in the iconic chassis with a brushed aluminum faceplate, custom-machined buttons, and sturdy handles, all handcrafted in Minnesota, USA.

- Full-Function Metal Remote: Includes a full-function metal remote control for complete command from the listening chair.