{"product_id":"cayin-ha-300-mk3","title":"Cayin HA-300 MK3 | Flagship Desktop Tube Headphone Amplifier","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/cayin-logo-gold-shadow.jpg?v=1691786430\" alt=\"Cayin gold logo with shadow\" style=\"display: block; margin-left: auto; margin-right: auto; width: 65%;\"\u003e\u003c\/p\u003e\n\u003ch4\u003eThe HA-300 MK3 continues Cayin’s pure Class A, single-ended triode design, while making meaningful design upgrades in the circuit, transformer and power architecture\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDirect Heated Triode Vacuum Tube Headphone\/Speaker Amplifier\u003c\/li\u003e\n\u003cli\u003eNew Third-Gen Upgraded Circuit Design\u003c\/li\u003e\n\u003cli\u003eGZ34 \/ 5AR4 Rectifier Tubes, Offering Wider Compatibility for Tube Rolling\u003c\/li\u003e\n\u003cli\u003eSpecially Optimized for IEM Compatibility\u003c\/li\u003e\n\u003cli\u003eUpgraded Power Supply Section for Enhanced Stability and Lower Noise\u003c\/li\u003e\n\u003cli\u003eComprehensive Headphone Outputs, Inputs + Speaker Output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Cayin HA-300 MK3 amplifier front left 3 quarter angle sitting on wooden desk with headphones and DAP\" height=\"1200\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/cayin-ha300-mk3-banner.webp?v=1774371739\"\u003e\u003c\/p\u003e\n\u003ch3\u003eA Comprehensive Upgrade\u003c\/h3\u003e\n\u003cp\u003eAs the third-generation model in the HA-300 series, the HA-300 MK3 builds on the acclaimed architecture of the MK2 with major advances in components, circuitry, craftsmanship, and industrial design. From sonic refinement to day-to-day usability, every detail reflects Cayin's ongoing pursuit of acoustic excellence.\u003c\/p\u003e\n\u003ch3\u003ePure Single-Ended Class A Design\u003c\/h3\u003e\n\u003cp\u003eThe HA-300 MK3 continues the series' classic single-ended pure Class A tube amplifier design, combining premium tubes with a newly upgraded circuit to achieve an exceptional balance of musicality and technical performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eJJ GZ34 \/ 5AR4 Rectifier Tubes\u003c\/strong\u003e\u003cbr\u003eThe HA-300 MK3 employs two JJ GZ34 \/ 5AR4 tubes and an upgraded tube rectification circuit delivering improved efficiency while preserving the distinctive appeal of tube-based power supply design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eJJ 6SN7 Voltage Amplification Tubes\u003c\/strong\u003e\u003cbr\u003eThe JJ 6SN7 tubes provide low noise and high resolution, enabling accurate voltage gain and excellent detail retrieval while laying a clean foundation for the subsequent amplification stages.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGenalex Gold Lion PX300B Power Tubes\u003c\/strong\u003e\u003cbr\u003eKnown for their warm, richly textured character, these tubes deliver a full, delicate midrange, smooth, transparent highs, and deep, well-controlled bass.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Cayin HA-300 MK3 amplifier tubes closeup\" height=\"1200\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/cayin-ha300-mk3-tubes_52874761-fa98-4d7e-afcc-f366a826aedd.webp?v=1774371516\"\u003e\u003c\/p\u003e\n\u003ch3\u003eThird-Gen Circuit Upgrade\u003c\/h3\u003e\n\u003cp\u003eThe HA-300 MK3 adopts a physically separated power supply and main amplifier chassis, providing cleaner energy delivery and improved isolation from interference. The voltage amplification stage incorporates a low-noise regulated circuit with independent staged power delivery, preserving the integrity of the original audio signal. \u003c\/p\u003e\n\u003cp\u003eIn addition, the HA-300 MK3 has been specially optimized for IEM compatibility, making it suitable for a much wider range of headphones than before.\u003c\/p\u003e\n\u003ch3\u003eRefined in Every Detail\u003c\/h3\u003e\n\u003cp\u003eThe updated transformer housing design removes the previous aluminum decorative plates, resulting in a cleaner, lighter visual appearance and improving heat dissipation. For improved wear resistance and reduced fingerprint visibility, the HA-300 MK3 chassis is finished with a fine sandblasted texture. A newly designed family-style tube cage replaces the previous design, providing stronger protection.\u003c\/p\u003e\n\u003ch3\u003ePremium Components + Features\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThird-Generation Custom Transformers\u003c\/strong\u003e\u003cbr\u003eThe HA-300 MK3 is equipped with a third-gen wide-bandwidth EI output transformer and toroidal power transformer, developed specifically for this model. These transformers provide significantly improved shielding and reduced noise interference.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDUELUND Coupling Capacitors\u003c\/strong\u003e\u003cbr\u003eThe headphone amplifier uses DUELUND coupling capacitors from Denmark, widely regarded as an ideal match for tube amplifiers. Their low distortion and excellent transmission characteristics enhance detail and layering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNew Gold-Plated Tube Sockets\u003c\/strong\u003e\u003cbr\u003eNew premium gold-plated tube sockets provide better conductivity and more stable contact than conventional ceramic gold-plated pin sockets. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e60-Second Startup Delay\u003c\/strong\u003e\u003cbr\u003eA 60-second delayed mute function allows the amplifier to warm up properly after power-on, helping it reach optimal operating condition before playback begins.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Cayin HA-300 MK3 amplifier black rear view of inputs and outputs whitebox\" height=\"1200\" width=\"2048\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/cayin-ha300-mk3-inputs.webp?v=1774371616\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply: 6.26\" x 13.58\" x 8.07\"\u003c\/li\u003e\n\u003cli\u003eAmplifier: 11.26\" × 14.49\" × 8.07\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply: 22 lbs\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eAmplifier: 37 lbs\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Cayin HA-300 MK3 specifications\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/cayin-ha300-mk3-specifications.jpg?v=1774368815\"\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eFull list of specifications\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Cayin","offers":[{"title":"Black","offer_id":42238667358283,"sku":"CAY-HA300-MK3-B","price":4399.0,"currency_code":"USD","in_stock":true},{"title":"Silver","offer_id":42238667391051,"sku":"CAY-HA300-MK3-S","price":4399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/cayin-4-ha300-mk3-thumb.webp?v=1774372205","url":"https:\/\/bloomaudio.mom\/products\/cayin-ha-300-mk3","provider":"Bloom Audio","version":"1.0","type":"link"}