{"product_id":"audio-research-ls27-tube-preamplifier-3","title":"Audio Research LS27 Tube Preamplifier","description":"Audio Research LS27 Preamplifier features a pure Class-A zero-feedback hybrid audio circuit powered by twin 6H30 triode vacuum tubes, high-grade JFETs, and a fully regulated solid-state power supply with custom capacitors. Offering eight inputs equipped with balanced XLR and single-ended RCA connections, three selectable gain levels, and a microprocessor-controlled 104-step volume selector, this line-stage unit delivers exceptional flexibility and signal purity. The robust front panel features integrated rack handles, a clear vacuum fluorescent display, processor pass-through capability, tube hour tracking, and phase inversion control. Every element is engineered to bridge audio sources and power amplifiers with total transparency.\n\nProfessional reviewers and audiophiles praise the LS27 for its smooth, unforced sound, extraordinary transparency, and expansive three-dimensional imaging. The general consensus emphasizes its successful pairing of warm tube harmonics with solid-state speed, ultra-quiet backgrounds, and deep bass articulation. Listeners highlight its pinpoint instrument placement, natural dynamic decay, and engaging musical presentation. Renowned for outstanding build quality, bulletproof reliability, and trickle-down innovation from top-tier Reference designs, it has built an enduring reputation as a premier line-stage preamplifier.\n\nIntegrating this preamplifier into an audio system establishes an authoritative control center that allows every source component and amplifier to operate at peak fidelity, unlocking hidden layers of detail across every listening session.","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":67694484586777,"sku":"100738","price":3399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4225\/1545\/files\/100738-8.jpg?v=1791422284","url":"https:\/\/tmraudio.com\/products\/audio-research-ls27-tube-preamplifier-3","provider":"The Music Room","version":"1.0","type":"link"}