{"product_id":"rogue-audio-atlas-magnum-iii-power-amplifier","title":"Rogue Audio Atlas Magnum III Power Amplifier","description":"\u003cp\u003eThe \u003cstrong\u003eRogue Audio Atlas Magnum III\u003c\/strong\u003e is a stereo tube power amplifier that delivers 100 watts per channel from four KT120 output tubes in a push-pull configuration, with a switchable triode mode that drops to 60 watts for a more intimate presentation. Built on the same circuit platform that earned Stereophile Recommended Component status, the Atlas Magnum III brings Rogue's signature tube power to a separate-components system at a price that undercuts most competing tube power amps by a wide margin.\u003c\/p\u003e\n\n\u003ch5\u003eKey Features of the Atlas Magnum III\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 Watts Per Channel (Ultralinear):\u003c\/strong\u003e Four KT120 output tubes in push-pull deliver 100W into 8 ohms, with a switchable 60W triode mode for tonal flexibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Selectable Output Taps:\u003c\/strong\u003e 4-ohm and 8-ohm transformer taps match the amplifier's output impedance to your speakers for optimal power transfer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Bias Meter:\u003c\/strong\u003e Front-panel meter and rear-panel bias adjustment let you set and monitor tube bias without external tools or experience\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Tube Complement:\u003c\/strong\u003e Two 12AX7 and two 12AU7 driver tubes feed four KT120 output tubes, all user-replaceable and widely available\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive Linear Power Supply:\u003c\/strong\u003e High-storage power supply with slow-start turn-on sequencing protects tubes and delivers stable current under dynamic loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy 2-Ounce Copper Circuit Board:\u003c\/strong\u003e Thick copper traces with short signal paths and precision components keep the noise floor low\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandcrafted in the USA:\u003c\/strong\u003e Designed and built in Brodheadsville, Pennsylvania, with every unit tested, burned in, and auditioned before shipping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eTube Amplifier Architecture\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III uses a classic push-pull output stage with four KT120 tubes, a robust power tube originally developed for military applications and prized in audio for its combination of high power handling and long service life. The driver stage employs two 12AX7 tubes for voltage gain and two 12AU7 tubes as phase splitters, a proven topology that Rogue has refined across three generations of the Atlas platform. The entire circuit is built on a heavy 2-ounce copper board with short signal paths and precision components, minimizing parasitic capacitance and keeping the noise floor well below the music.\u003c\/p\u003e\n\n\u003ch5\u003eUltralinear and Triode Operation\u003c\/h5\u003e\n\u003cp\u003eA rear-panel switch toggles between ultralinear mode (100 watts per channel) and triode mode (60 watts per channel). Ultralinear operation delivers the full rated power with maximum headroom and dynamic punch, making it the natural choice for large-scale orchestral music, rock, and speakers with demanding impedance curves. Triode mode reduces power but shifts the harmonic structure toward a smoother, more liquid midrange that many listeners prefer for small-ensemble jazz, vocals, and acoustic instruments. Both modes are available at any time without powering down.\u003c\/p\u003e\n\n\u003ch5\u003ePower Supply Design\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III's power supply uses a massive high-storage linear design that provides deep energy reserves for sustained bass passages and dynamic peaks. Slow-start turn-on sequencing brings the amplifier up gradually, allowing tubes to reach operating temperature before full voltage is applied. This protects the tubes from thermal shock at startup and contributes to longer tube life across the entire complement. A detachable IEC power cord allows aftermarket cable upgrades for those who want to experiment.\u003c\/p\u003e\n\n\u003ch5\u003eBiasing Made Simple\u003c\/h5\u003e\n\u003cp\u003eTube amplifiers require periodic bias adjustment as tubes age, but Rogue makes the process approachable even for first-time tube owners. The Atlas Magnum III includes a built-in bias meter on the front panel and bias adjustment points accessible from the rear panel. The procedure takes about two minutes with a small screwdriver: flip the bias switch, read the meter, adjust the trim pot until the needle centers, repeat for each tube pair. No multimeter, no experience, no anxiety. Rogue recommends checking bias every few hundred hours or whenever tubes are replaced.\u003c\/p\u003e\n\n\u003ch5\u003e\"Dark\" Version\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III Dark ($3,895) applies Rogue's comprehensive upgrade package to the standard amplifier:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Power Supply:\u003c\/strong\u003e 25% more power supply capacitance with Hex Fred high-speed diodes and polypropylene bypass capacitors for improved current delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Coupling Capacitors:\u003c\/strong\u003e Ultra-premium caps in the signal path for greater transparency and tonal refinement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Tube Complement:\u003c\/strong\u003e Premium matched KT120 output tubes and upgraded small-signal tubes from Psvane, Telefunken, or RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCardas Rhodium Binding Posts:\u003c\/strong\u003e High-quality speaker terminals and connectors throughout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNude Vishay Resistors:\u003c\/strong\u003e Precision resistors in critical input stages for lower noise and greater signal purity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Dark upgrade targets the power supply and signal path components that have the most direct impact on dynamics, noise floor, and resolution. It shares its upgrade philosophy with Rogue's flagship Apollo Dark amplifiers.\u003c\/p\u003e\n\n\u003ch5\u003eExplore the Full Rogue Audio Power Amplifier Lineup\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III is the entry point to Rogue Audio's power amplifier range. The lineup scales from here through flagship monoblocks:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-stereo-100-amplifier\"\u003eStereo 100\u003c\/a\u003e\u003c\/strong\u003e - Same tube topology with Mundorf EVO Oil coupling capacitors, ultra-wide bandwidth output transformers, and mechanically isolated transformers. The reference-grade step up from the Atlas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-dragon-power-amplifier\"\u003eDragoN Power Amplifier\u003c\/a\u003e\u003c\/strong\u003e - 300W hybrid with Rogue's proprietary tubeD circuit pairing 12AU7 tubes with Hypex N-Core Class D modules. Balanced XLR inputs, runs cool, no biasing required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/rogue-audio-m-180-monoblocks-per-pair\"\u003eM-180 Monoblocks\u003c\/a\u003e\u003c\/strong\u003e - 180W pure tube monoblocks derived from Rogue's flagship Apollo circuit. Balanced XLR, triode\/ultralinear switching, Stereophile Class A Recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003ePairing with a Rogue Preamplifier\u003c\/h5\u003e\n\u003cp\u003eThe Atlas Magnum III pairs naturally with any of Rogue's RP-series preamplifiers. The \u003ca href=\"\/products\/rogue-audio-rp-1-preamplifier\"\u003eRP-1\u003c\/a\u003e offers a tube preamp at the same value-oriented price point, while the \u003ca href=\"\/products\/rogue-audio-rp-5-v2-preamplifier\"\u003eRP-5 v2\u003c\/a\u003e and \u003ca href=\"\/products\/rogue-audio-rp-7-v2-preamplifier\"\u003eRP-7 v2\u003c\/a\u003e add balanced outputs, remote control, and progressively refined circuit topologies. All RP-series preamps use 12AU7 tubes, keeping your tube inventory simple across the system.\u003c\/p\u003e\n\n\u003ch5\u003eThe Listening Room Difference\u003c\/h5\u003e\n\u003cp\u003eWe're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on trust, not hype. We've carried Rogue Audio for years because their products deliver real value and hold up over time. Every component is designed and built in Pennsylvania, and we're proud to support a manufacturer that shares our commitment to quality. Whether you're visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction.\u003c\/p\u003e\n\n\u003ch5\u003eAtlas Magnum III Specifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 WPC (ultralinear) \/ 60 WPC (triode) into 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmplifier Topology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePush-pull tube, ultralinear\/triode switchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20Hz - 30kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200K ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Complement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 x KT120, 2 x 12AX7, 2 x 12AU7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGold-plated RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeaker Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGold-plated binding posts (4-ohm and 8-ohm taps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBiasing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUser-adjustable with built-in front-panel meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-storage linear with slow-start sequencing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\/240V - 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Cord\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDetachable IEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCircuit Board\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy (2 oz) copper with precision components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFaceplate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMachined aluminum (silver or black)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Cage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOptional (included with some configurations)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePhysical\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18\" W x 17\" D x 6.75\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55 lbs (shipping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 years (6 months on tubes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDesigned and handcrafted in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Rogue Audio","offers":[{"title":"Silver \/ Standard","offer_id":67848807842161,"sku":"RAAT3SI","price":1826.95,"currency_code":"USD","in_stock":true},{"title":"Black \/ Standard","offer_id":67848807874929,"sku":"RAAT3BL","price":1826.95,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Dark","offer_id":67848807907697,"sku":"RAAT3SI-Dark","price":2375.95,"currency_code":"USD","in_stock":true},{"title":"Black \/ Dark","offer_id":67848807940465,"sku":"RAAT3BL-Dark","price":2375.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0923\/5215\/1921\/files\/AtlasMagnumIIIpoweramplifier.jpg?v=1792519421","url":"https:\/\/sliyden.store\/products\/rogue-audio-atlas-magnum-iii-power-amplifier","provider":"sliyden.store","version":"1.0","type":"link"}