The Audio Research LS-2 is a high-performance tube preamplifier designed for serious two-channel audio systems. It amplifies line-level signals with absolute purity using a single Class-A gain stage and no solid-state components in the signal path. Built around a pair of 6H30 tubes, the LS-2 prioritizes transparency, tonal richness, and dynamic stability. It integrates seamlessly into everything from reference-grade separates to stripped-down vinyl rigs, delivering uncolored signal flow with hands-on control and elegant versatility. Audio Research LS-2 Key Features Tubes: Dual 6H30 triodes in a single Class-A gain stage Topology: Cathode follower design with no solid-state devices in the signal path Touchscreen Interface: Balance, input labeling, and color display control Inputs: 4 single-ended (RCA) and 2 balanced (XLR) line-level inputs Metal Remote Control: New machined metal remote with system functions Optional Phono Card: MM/MC user-installable module (42dB / 62dB gain) Optional DAC Card: USB, Coax, and Optical input module (installs in seconds) Construction: Hand-built in Minnesota with classic ARC styling Pure Class-A Tube Preamplifier Performance At the heart of the LS-2 is a pair of 6H30 tubes operating in a single gain stage with no feedback. The signal path is completely free of solid-state devices, allowing for natural tonal development and effortless dynamics. A constant current cathode bias maintains performance consistency and keeps the tube circuit operating in its optimal range. For listeners who value imaging, control, and harmonic texture, this design offers remarkable musical integrity without the need for complexity. Streamlined Connectivity with Expandable Options The LS-2 supports a range of source gear with four RCA inputs and two balanced XLRs. It's easy to integrate into a high-end stack or a more compact setup. The optional DAC card adds USB, coaxial, and optical digital inputs, while the MM/MC phono module brings analog flexibility to the front end. Both modules are user-installable and require no special tools or setup procedures. That flexibility makes the LS-2 one of the most adaptable tube preamps in the Audio Research lineup. Touchscreen Control Meets Classic ARC Design Modern conveniences meet traditional build quality in the LS-2. The touchscreen interface allows for real-time adjustment of balance, display settings, and input labeling. You can personalize the unit to your system and preferences without digging through menus or button sequences. A machined metal remote gives you the same level of control from the listening chair. Visually, the LS-2 stays true to ARC’s heritage with a silver chassis, black trim, and proportions that fit beautifully alongside other components from the brand. Pairing the LS-2 The LS-2 pairs exceptionally well with the new Audio Research S-100 or upcoming S-200 power amplifier. Each was designed alongside the LS-2 as part of ARC’s next-generation lineup, offering a fully balanced, high-current path from source to speaker with shared sonic goals and system synergy. The Listening Room Difference The Listening Room is a third-generation, family-owned business where every product we carry has been hand-selected and system-tested. Owner Mike Hoatson personally oversees setup, support, and delivery for nearly every order. Many clients speak to Mike directly before they ever place a purchase. We don’t ship boxes and call it done. We help you build a system that feels right in your space and sounds right to your ears. That’s the difference when you work with us instead of a faceless online dealer. Specifications Design Tube preamplifier, Class-A, single gain stage Tubes 2 x 6H30 triodes Gain Topology Cathode follower, no feedback Inputs 4 x RCA (SE), 2 x XLR (balanced) Optional DAC Card USB, Coaxial, Optical — user installable Optional Phono Card MM/MC (42dB / 62dB gain) — user installable User Interface Full touchscreen with balance, input naming, display color Remote New machined metal remote control Construction Hand-built in Minnesota, USA Finish Classic Audio Research silver chassis
