{"product_id":"feliks-audio-echo-mk-ii","title":"Feliks Audio Echo Classic","description":"\u003cp\u003eThe Feliks Audio Echo Classic is the most accessible way into the Feliks Audio tube amplifier lineup. Built as the purest expression of the Echo concept, it keeps the focus exactly where it should be: handcrafted Polish tube amplification, a warm and natural presentation, and strong synergy with high-impedance headphones.\u003c\/p\u003e  \u003cp\u003eAs a simplified version of Feliks Audio’s best-selling Echo platform, Echo Classic is made for listeners who want the tube experience without paying for extras they may not need. It delivers the rich midrange texture, smooth treble, spacious imaging, and easy musicality people expect from a well-built OTL tube amplifier, all in a compact desktop design with classic wood side panels.\u003c\/p\u003e  \u003ch3\u003ePure Tube Sound, Made More Accessible\u003c\/h3\u003e \u003cp\u003eEcho Classic is designed as a gateway into premium tube audio. It is not overloaded with features, switching options, or unnecessary complexity. Instead, Feliks Audio has stripped the formula back to the essentials: a clean signal path, a proper OTL tube circuit, carefully chosen tubes, and enough power for the high-impedance headphones that pair best with this kind of amplifier.\u003c\/p\u003e  \u003cp\u003eThe result is a headphone amp that feels immediate and inviting. Vocals have body, instruments carry natural texture, and treble stays smooth without losing air. It is the kind of sound that makes long listening sessions feel relaxed and immersive rather than clinical or fatiguing.\u003c\/p\u003e  \u003ch3\u003eBuilt for High-Impedance Headphones\u003c\/h3\u003e \u003cp\u003eEcho Classic is optimized for headphones from 80Ω to 600Ω, making it a natural match for many of the dynamic-driver headphones that tube amp fans love most. With 350mW of output power and 20dB of gain, it has the voltage swing and character needed to bring out the richness, scale, and tonal density that make high-impedance headphones so rewarding.\u003c\/p\u003e  \u003cp\u003eThis is where OTL tube amplification makes the most sense. Pair Echo Classic with the right headphone and you get a presentation that feels open, full, and human, with a touch of warmth that flatters without smearing the music.\u003c\/p\u003e  \u003ch3\u003eClassic OTL Character\u003c\/h3\u003e \u003cp\u003eOTL stands for output transformerless, a tube amplifier design that removes the output transformer from the headphone signal path. For the listener, that design can translate into a more direct and expressive tube sound, especially with medium to high-impedance headphones.\u003c\/p\u003e  \u003cp\u003eEcho Classic uses a pair of driver tubes and a pair of power tubes to deliver the kind of sound Feliks Audio is known for: smooth, spacious, slightly warm, and naturally detailed. It gives music a sense of weight and flow without making the amp sound slow or overly soft.\u003c\/p\u003e  \u003ch3\u003eSimplified Construction, Feliks Craftsmanship\u003c\/h3\u003e \u003cp\u003eThe Echo Classic is intentionally simple, but it does not feel basic. It is handcrafted in Poland with the same attention to fit, finish, and long-term reliability that defines Feliks Audio’s higher-end amplifiers. The compact metal chassis and wood side panels give it a timeless desktop look that feels equally at home in a focused headphone system or a smaller office setup.\u003c\/p\u003e  \u003cp\u003eBy keeping the design streamlined, Feliks Audio makes the Echo Classic easier to place, easier to use, and easier to recommend as a first serious tube amplifier. No clutter, no unnecessary extras, just the core tube experience done properly.\u003c\/p\u003e  \u003ch3\u003eKey Features\u003c\/h3\u003e \u003cul\u003e   \u003cli\u003eEntry-level Feliks Audio OTL tube headphone amplifier\u003c\/li\u003e   \u003cli\u003eMore accessible version of Feliks Audio’s best-selling Echo platform\u003c\/li\u003e   \u003cli\u003eDesigned for high-impedance headphones from 80Ω to 600Ω\u003c\/li\u003e   \u003cli\u003eClassic warm tube sound with smooth treble and rich midrange texture\u003c\/li\u003e   \u003cli\u003e350mW output power\u003c\/li\u003e   \u003cli\u003e20dB amplification level\u003c\/li\u003e   \u003cli\u003e15Hz to 45kHz frequency response\u003c\/li\u003e   \u003cli\u003e6.3mm headphone output\u003c\/li\u003e   \u003cli\u003ePair of driver tubes and pair of power tubes included\u003c\/li\u003e   \u003cli\u003eCompact desktop chassis with wood side panels\u003c\/li\u003e   \u003cli\u003eHandcrafted in Poland\u003c\/li\u003e   \u003cli\u003eSimple, focused design with no unnecessary extras\u003c\/li\u003e \u003c\/ul\u003e  \u003ch3\u003eTechnical Specs\u003c\/h3\u003e \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e   \u003ctbody\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003eOTL tube headphone amplifier\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e100 kΩ\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eRecommended Headphone Impedance\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e80Ω to 600Ω\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e15 Hz to 45 kHz, +\/- 3 dB\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e350mW\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eAmplification Level\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e20dB\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e0.4% at 300Ω, 20mW\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eHeadphone Output\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e6.3mm jack\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eTubes\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e1 pair of driver tubes, 1 pair of power tubes\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eAC Voltage\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e120V or 230V\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e3.5 kg\u003c\/td\u003e     \u003c\/tr\u003e     \u003ctr\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e       \u003ctd style=\"padding:10px; border:1px solid #ddd;\"\u003e26.8 x 21.7 x 11.8 cm\u003c\/td\u003e     \u003c\/tr\u003e   \u003c\/tbody\u003e \u003c\/table\u003e  \u003ch3\u003eWhat’s in the Box\u003c\/h3\u003e \u003cul\u003e   \u003cli\u003eFeliks Audio Echo Classic tube amplifier\u003c\/li\u003e   \u003cli\u003e1 pair of driver tubes\u003c\/li\u003e   \u003cli\u003e1 pair of power tubes\u003c\/li\u003e   \u003cli\u003eAC cord\u003c\/li\u003e   \u003cli\u003eUser manual\u003c\/li\u003e   \u003cli\u003eWarranty card\u003c\/li\u003e \u003c\/ul\u003e","brand":"Opalisse","offers":[{"title":"Default Title","offer_id":54132762018084,"sku":"FLA-ECH-CLASSIC","price":8.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8731\/4212\/files\/e3ba64eb-7a11-4a42-b660-d7e5198a2463.jpg?v=1780069777","url":"https:\/\/opalisse.shop\/products\/feliks-audio-echo-mk-ii","provider":"Opalisse","version":"1.0","type":"link"}