{"product_id":"rogue-audio-m-250-ultra-mono-block-amplifier","title":"Rogue Audio M-250 Ultra Mono-block Amplifier","description":"\u003c!-- ======================================================\n     Rogue Audio M-250 Ultra Monoblock Amplifiers — AL (bh-*) HTML\n     Two-Column Layout (Overview left \/ Specifications right)\n     Long-tail keyword used 5×: “Rogue Audio M-250 Ultra Monoblock Amplifiers”\n     ====================================================== --\u003e\n\u003cstyle\u003e\n  .bh-wrap{max-width:1100px;margin:0 auto;padding:1rem 1.25rem;line-height:1.6}\n  .bh-eyebrow{letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;opacity:.7}\n  .bh-title{font-size:3rem;margin:.25rem 0 1rem}\n  .bh-sub{font-style:italic;margin:0 0 1.25rem}\n  .bh-grid{display:grid;gap:1.25rem}\n  @media(min-width:900px){.bh-grid{grid-template-columns:1.3fr .7fr;align-items:start}}\n  .bh-section{margin:2rem 0}\n  .bh-bullets{list-style:disc;padding-left:1.25rem;margin:.5rem 0 0}\n  .bh-specs{width:100%;border-collapse:collapse}\n  .bh-specs th,.bh-specs td{border:1px solid #e5e7eb;padding:.65rem;vertical-align:top}\n  .bh-specs th{width:42%;background:#f8fafc;text-align:left}\n  .bh-badge{display:inline-block;border:1px solid #e5e7eb;border-radius:999px;padding:.2rem .6rem;margin:.15rem .3rem 0 0;font-size:.85rem}\n  .bh-badges{margin-top:.5rem}\n  .bh-faq details{border:1px solid #e5e7eb;border-radius:.5rem;padding:0.75rem 1rem;margin:.5rem 0;background:#fafafa}\n  .bh-faq summary{font-weight:600;cursor:pointer}\n  .bh-note{font-size:.95rem;opacity:.9}\n  .bh-condition{display:inline-block;border:1px solid #e5e7eb;border-radius:999px;padding:.3rem .75rem;margin:.5rem 0 0;font-size:.85rem;background:#fafafa}\n\u003c\/style\u003e\n\u003cdiv class=\"bh-wrap\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Product\"\u003e\n\u003cspan class=\"bh-eyebrow\"\u003eROGUE AUDIO\u003c\/span\u003e\n\u003ch1 class=\"bh-title\" itemprop=\"name\"\u003eRogue Audio M-250 Ultra Monoblock Amplifier\u003c\/h1\u003e\n\u003cp class=\"bh-sub\"\u003eReference-level pure tube monoblocks • over 250 watts in Ultralinear mode • selectable Triode\/Ultralinear operation • balanced and RCA inputs • built in bias meters • entirely designed and built in the USA\u003c\/p\u003e\n\u003cdiv class=\"bh-condition\"\u003eFlagship Tube Monoblock Design\u003c\/div\u003e\n\u003cdiv class=\"bh-grid\"\u003e\n\u003c!-- LEFT COLUMN --\u003e\n\u003cdiv\u003e\n\u003csection id=\"overview\" class=\"bh-section\"\u003e\n\u003ch2\u003eMeet the M-250 Ultra\u003c\/h2\u003e\n\u003cp itemprop=\"description\"\u003eThe \u003cstrong\u003eRogue Audio M-250 Ultra Monoblock Amplifiers\u003c\/strong\u003e represent the company’s flagship approach to reference-level tube amplification, combining elegance, refinement, and immense output capability in a true monoblock platform. Designed to reveal the finest musical details while delivering seemingly limitless dynamics, these amplifiers are built for listeners who want the tonal sophistication of tubes without sacrificing authority, scale, or control.\u003c\/p\u003e\n\u003cdiv class=\"bh-badges\"\u003e\n\u003cspan class=\"bh-badge\"\u003eMonoblock Design\u003c\/span\u003e \u003cspan class=\"bh-badge\"\u003e250 Watts\u003c\/span\u003e \u003cspan class=\"bh-badge\"\u003eTriode \/ Ultralinear\u003c\/span\u003e \u003cspan class=\"bh-badge\"\u003eBalanced + RCA Inputs\u003c\/span\u003e \u003cspan class=\"bh-badge\"\u003eBuilt in USA\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"bh-note\"\u003eWhether the system is centered around jazz, rock, or large-scale orchestral works, these amplifiers are engineered to combine clarity, bandwidth, and dynamic authority at a truly serious level.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection id=\"highlights\" class=\"bh-section\"\u003e\n\u003ch2\u003eHighlights \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue monoblock architecture\u003c\/strong\u003e — dedicated chassis for each channel supports maximum channel separation and a more uncompromised stereo presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive linear power supply\u003c\/strong\u003e — enormous energy reserves help these amplifiers reproduce musical transients far beyond the rated output power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable output character\u003c\/strong\u003e — on-the-fly Triode or Ultralinear operation allows the user to tailor presentation and performance to system matching and listening preference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference-grade build quality\u003c\/strong\u003e — huge transformers, precision components, rhodium-plated connectors, and hand-built construction reflect a no-compromise engineering approach.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-friendly tube ownership\u003c\/strong\u003e — built in bias meters and individual bias switches make tube setup more approachable, even for less experienced users.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerious output with tube refinement\u003c\/strong\u003e — the \u003cstrong\u003eRogue Audio M-250 Ultra Monoblock Amplifiers\u003c\/strong\u003e are built for demanding loudspeakers and high-end systems that require both finesse and brute force.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection id=\"technology\" class=\"bh-section\"\u003e\n\u003ch2\u003eTechnology \u0026amp; Design\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePure tube amplification platform\u003c\/strong\u003e — each amplifier uses six KT88 output tubes, along with two 12AU7 tubes and one 12AX7, to deliver high continuous power with the dimensionality, texture, and natural harmonic character that tube enthusiasts value.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-high performance transformers\u003c\/strong\u003e — large transformers and ultra-high tolerance parts contribute to the amplifier’s bandwidth, dynamic range, and exceptionally stable overall performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible connectivity and speaker matching\u003c\/strong\u003e — the rear panel includes balanced XLR and single-ended RCA inputs, plus both 4 and 8 ohm binding posts for easier integration into a wide range of serious two-channel systems.\u003c\/p\u003e\n\u003cp class=\"bh-note\"\u003eIn a carefully assembled reference system, the \u003cstrong\u003eRogue Audio M-250 Ultra Monoblock Amplifiers\u003c\/strong\u003e deliver the kind of scale, composure, and musical openness expected from statement-level tube amplification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection id=\"faq\" class=\"bh-section bh-faq\"\u003e\n\u003ch2\u003eFAQ — M-250 Ultra\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these true monoblock amplifiers?\u003c\/summary\u003e\n\u003cp\u003eYes. Each amplifier is a dedicated mono chassis, which supports excellent channel separation and a more uncompromised stereo design.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan they run in both Triode and Ultralinear modes?\u003c\/summary\u003e\n\u003cp\u003eYes. They include a user-selectable on-the-fly switch for either Triode or Ultralinear operation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo they support balanced inputs?\u003c\/summary\u003e\n\u003cp\u003eYes. Each amplifier includes both balanced XLR and single-ended RCA inputs.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre they difficult to bias?\u003c\/summary\u003e\n\u003cp\u003eNo. Built in bias meters and individual bias switches make the biasing process much easier, even for tube newcomers.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWho are these best suited for?\u003c\/summary\u003e\n\u003cp\u003eThey are ideal for high-end listeners who want flagship tube monoblocks capable of driving serious loudspeakers with exceptional dynamics, bandwidth, and refinement.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection id=\"why-buy\" class=\"bh-section\"\u003e\n\u003ch2\u003eWhy Buy From Us\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003eExpert guidance on matching high-power tube amplifiers with the right speakers and preamplifier\u003c\/li\u003e\n\u003cli\u003eHelp integrating balanced and single-ended sources into a serious two-channel system\u003c\/li\u003e\n\u003cli\u003eSupport from a specialty audio retailer focused on performance, synergy, and long-term satisfaction\u003c\/li\u003e\n\u003cli\u003eTrusted advice for building a reference-grade listening system around world-class amplification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection id=\"related\" class=\"bh-section\"\u003e\n\u003ch2\u003eRelated \u0026amp; System Matches\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003eReference loudspeakers that benefit from high-current, high-power tube amplification\u003c\/li\u003e\n\u003cli\u003ePreamplifiers and source components with balanced and RCA connectivity\u003c\/li\u003e\n\u003cli\u003ePremium cables and power solutions appropriate for flagship monoblock systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c!-- RIGHT COLUMN --\u003e\n\u003caside\u003e\n\u003csection id=\"specs\" class=\"bh-section\"\u003e\n\u003ch2\u003eM-250 Ultra Specs\u003c\/h2\u003e\n\u003ctable class=\"bh-specs\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eTube monoblock power amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003eMonoblock for perfect channel separation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Power\u003c\/th\u003e\n\u003ctd\u003e250 WPC in Ultralinear mode with KT88s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Modes\u003c\/th\u003e\n\u003ctd\u003eUser selectable Triode \/ Ultralinear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Harmonic Distortion\u003c\/th\u003e\n\u003ctd\u003eLess than 0.1% typical, 1% at peak\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrequency Response\u003c\/th\u003e\n\u003ctd\u003e20Hz–25kHz at full output • 10Hz–100kHz at 10 watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Sensitivity\u003c\/th\u003e\n\u003ctd\u003e1.0V RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube Complement\u003c\/th\u003e\n\u003ctd\u003e6 × KT88, 2 × 12AU7, 1 × 12AX7 per amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eBalanced (XLR) and RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpeaker Outputs\u003c\/th\u003e\n\u003ctd\u003e4 and 8 ohm binding posts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnectors\u003c\/th\u003e\n\u003ctd\u003eHeavy-duty rhodium plated RCA connectors and rhodium plated binding posts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBiasing\u003c\/th\u003e\n\u003ctd\u003eBuilt in bias meters with individual bias switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Supply\u003c\/th\u003e\n\u003ctd\u003eMassive high-storage linear power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e12.75\" W × 18\" D × 13\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e88 lbs each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Requirements\u003c\/th\u003e\n\u003ctd\u003e115V\/230V – 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eEntirely designed and built in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"bh-note\"\u003eThe \u003cstrong\u003eRogue Audio M-250 Ultra Monoblock Amplifiers\u003c\/strong\u003e combine flagship tube architecture, massive power reserves, and premium build quality in a design aimed squarely at reference-level two-channel systems.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection id=\"whats-in-the-box\" class=\"bh-section\"\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul class=\"bh-bullets\"\u003e\n\u003cli\u003e2 × monoblock amplifiers\u003c\/li\u003e\n\u003cli\u003eTube complement installed or included as specified by manufacturer packaging\u003c\/li\u003e\n\u003cli\u003ePower cords\u003c\/li\u003e\n\u003cli\u003eDocumentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"bh-note\"\u003eEach unit is fully tested, burned-in, and auditioned as part of Rogue Audio’s production process.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c!-- No purchase\/CTA section --\u003e\u003c\/aside\u003e\n\u003c\/div\u003e\n\u003cmeta content=\"Rogue Audio\" itemprop=\"brand\"\u003e \u003cmeta content=\"Monoblock Amplifiers, Tube Amplifiers, High-End Power Amplifiers\" itemprop=\"category\"\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Rogue Audio","offers":[{"title":"Default Title","offer_id":53576416559470,"sku":"ROGM250","price":9497.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/rogue-m250.jpg?v=1776783201","url":"https:\/\/audiolab.com\/products\/rogue-audio-m-250-ultra-mono-block-amplifier","provider":"Audiolab","version":"1.0","type":"link"}