{"product_id":"esoteric-class-a-integrated-amplifier-f-01","title":"Esoteric Class A Integrated Amplifier  F-01","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eEsoteric F-01 Class A Integrated Amplifier\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eEsoteric F-01\u003c\/strong\u003e is a reference-grade \u003cstrong\u003eClass A integrated amplifier\u003c\/strong\u003e designed to deliver the refinement of Esoteric’s flagship separates in a single, exceptionally engineered component. Drawing heavily from technologies developed for the \u003cstrong\u003eGrandioso C1X preamplifier and S1X Class A power amplifier\u003c\/strong\u003e, the F-01 combines a fully balanced dual-mono preamplifier, powerful Class A amplification, advanced volume control, premium analog connectivity, and extensive system-upgrade capability. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003ePure Class A Power\u003c\/h2\u003e\n\u003cp\u003eThe F-01’s power amplifier section follows the circuit philosophy developed for the Grandioso S1X and delivers \u003cstrong\u003e30 watts per channel into 8 ohms in Class A\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eBehind that seemingly modest rating is an exceptionally substantial power supply featuring a massive \u003cstrong\u003e940VA EI-core transformer\u003c\/strong\u003e, dual-monaural rectification and smoothing circuits, and Grandioso-grade custom capacitors. The design prioritizes current delivery, dynamics, control, and tonal richness rather than simply chasing higher output numbers. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFour \u003cstrong\u003e10,000μF capacitors per channel\u003c\/strong\u003e operate in a dual-mono parallel configuration to provide a stable supply of current during demanding musical passages.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" class=\"img-responsive\" src=\"https:\/\/www.esoteric.jp\/images\/products\/_esoteric\/f-01\/f-01_interior.jpg\" width=\"100%\"\u003e\u003c\/p\u003e\n\u003ch2\u003eGrandioso-Inspired Balanced Dual-Mono Preamplifier\u003c\/h2\u003e\n\u003cp\u003eUnlike many integrated amplifiers, the F-01 incorporates a preamplifier architecture designed to approach the performance of a dedicated separate component.\u003c\/p\u003e\n\u003cp\u003eIts large-scale \u003cstrong\u003ebalanced dual-mono preamp\u003c\/strong\u003e incorporates technologies developed for the Grandioso C1X, with independent left and right signal paths and careful isolation of the audio, rectification, and control circuitry. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eUltra Fidelity Attenuator System\u003c\/h2\u003e\n\u003cp\u003eAt the heart of the F-01 is Esoteric’s proprietary \u003cstrong\u003eUltra Fidelity Attenuator System\u003c\/strong\u003e, derived from the Grandioso C1X.\u003c\/p\u003e\n\u003cp\u003eThe UFA-1792 stepped attenuator provides exceptionally precise \u003cstrong\u003e0.1 dB adjustment across 1,120 steps\u003c\/strong\u003e, allowing remarkably smooth and accurate volume control while its high-voltage architecture is designed to maximize dynamic range and signal-to-noise performance. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eES-Link Analog\u003c\/h2\u003e\n\u003cp\u003eThe F-01 includes \u003cstrong\u003ethree XLR inputs switchable between conventional balanced XLR and Esoteric ES-Link Analog\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eES-Link Analog uses Esoteric’s proprietary current-transmission architecture, designed to minimize the influence of interconnect impedance and preserve extremely small musical signals. The F-01 also provides both \u003cstrong\u003eES-Link Analog and XLR preamp outputs\u003c\/strong\u003e, allowing the technology to be used further through a compatible Esoteric system. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eFully Balanced Headphone Amplifier\u003c\/h2\u003e\n\u003cp\u003eHeadphone listening receives the same serious engineering attention as the main amplifier.\u003c\/p\u003e\n\u003cp\u003eThe F-01 incorporates a \u003cstrong\u003efully balanced dual-mono headphone amplifier\u003c\/strong\u003e with both \u003cstrong\u003e4-pin XLR balanced\u003c\/strong\u003e and \u003cstrong\u003e6.3 mm unbalanced\u003c\/strong\u003e outputs. Balanced output reaches \u003cstrong\u003e600 mW into 32 ohms\u003c\/strong\u003e, while adjustable gain from \u003cstrong\u003e0 to +18 dB in 3 dB increments\u003c\/strong\u003e allows the amplifier to accommodate a wide range of headphones. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eDual-Mono MM\/MC Phono Stage\u003c\/h2\u003e\n\u003cp\u003eVinyl playback is integrated at a similarly high level. The built-in \u003cstrong\u003eMM\/MC phono preamplifier\u003c\/strong\u003e uses independent left and right circuits and independent channel power supplies for excellent channel separation.\u003c\/p\u003e\n\u003cp\u003eThis makes the F-01 a compelling centerpiece for systems combining reference digital playback with a high-performance turntable. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003ePrecision 3-Band Tone Control\u003c\/h2\u003e\n\u003cp\u003eA balanced dual-mono \u003cstrong\u003eTreble \/ Middle \/ Bass\u003c\/strong\u003e tone-control circuit provides precise adjustment without compromising the F-01's high-end design philosophy.\u003c\/p\u003e\n\u003cp\u003eAdjustments can be stored independently for each source, with control available in fine \u003cstrong\u003e0.5 dB increments up to ±12 dB\u003c\/strong\u003e. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eExceptional Speaker Control\u003c\/h2\u003e\n\u003cp\u003eEsoteric has extensively reduced internal impedance throughout the amplifier, using \u003cstrong\u003e105μm copper circuit-board conductors, 1.0 mm high-purity OFC bus bars, ultra-thick internal cabling, and contactless MOSFET speaker-output switching\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe resulting \u003cstrong\u003edamping factor of 500\u003c\/strong\u003e gives the F-01 substantial control over demanding loudspeakers and large woofers, particularly in the lowest frequencies.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.esoteric.jp\/images\/products\/_esoteric\/f-01\/gallery\/f-01_w_rear.jpg\"\u003e\u003c\/p\u003e\n\u003ch2\u003eReference Chassis Construction\u003c\/h2\u003e\n\u003cp\u003eAt approximately \u003cstrong\u003e32 kg (70.5 lb)\u003c\/strong\u003e, the F-01 has the physical construction expected of a reference separate amplifier.\u003c\/p\u003e\n\u003cp\u003eExtensive aluminum construction, a semi-floating top panel, Esoteric’s patented isolation feet, and specially shaped heatsinks are all designed to control resonance and mechanical vibration while preserving the amplifier's musical openness. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eDesigned to Grow With Your System\u003c\/h2\u003e\n\u003cp\u003eThe F-01 offers unusually extensive upgrade possibilities for an integrated amplifier.\u003c\/p\u003e\n\u003cp\u003eAn \u003cstrong\u003eEsoteric S-05 Class A power amplifier\u003c\/strong\u003e can be connected through the XLR or ES-Link Analog pre-outs to create a multi-amplifier system. The optional \u003cstrong\u003ePS-01F external power supply\u003c\/strong\u003e can also be added to further enhance the performance of the F-01's internal preamplifier. \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e30W + 30W into 8Ω, Class A\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eBalanced dual-mono preamplifier architecture\u003c\/li\u003e\n\u003cli\u003eGrandioso C1X and S1X-derived technologies\u003c\/li\u003e\n\u003cli\u003eMassive \u003cstrong\u003e940VA EI-core power transformer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUFA-1792 Ultra Fidelity Attenuator\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1,120 volume steps in 0.1 dB increments\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e3 × ES-Link Analog \/ XLR selectable inputs\u003c\/li\u003e\n\u003cli\u003eXLR and ES-Link Analog preamp outputs\u003c\/li\u003e\n\u003cli\u003eFully balanced dual-mono headphone amplifier\u003c\/li\u003e\n\u003cli\u003e4-pin XLR and 6.3 mm headphone outputs\u003c\/li\u003e\n\u003cli\u003eBuilt-in dual-mono \u003cstrong\u003eMM\/MC phono stage\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBalanced 3-band tone control\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDamping factor: 500\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eOptional PS-01F external preamp power supply\u003c\/li\u003e\n\u003cli\u003eS-05 multi-amplifier expansion capability\u003c\/li\u003e\n\u003cli\u003eRS-232C and trigger control for system integration \u003cspan class=\"contents\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Grid HiFi Recommendation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eEsoteric F-01\u003c\/strong\u003e is an outstanding choice for a reference two-channel system where the purity and musical character of \u003cstrong\u003eClass A amplification\u003c\/strong\u003e are desired without moving to a full stack of separate components.\u003c\/p\u003e\n\u003cp\u003eSpeaker matching is especially important when selecting a Class A amplifier. \u003cstrong\u003eContact The Grid HiFi for expert advice on pairing the F-01 with the right loudspeakers, digital sources, turntables, cabling, and power components for your system and listening room.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Esoteric","offers":[{"title":"Silver","offer_id":54695928168785,"sku":null,"price":21000.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":54695928201553,"sku":null,"price":21000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1047\/7178\/0945\/files\/f01_front_silver.png?v=1787760720","url":"https:\/\/gridhifi.com\/products\/esoteric-class-a-integrated-amplifier-f-01","provider":"The Grid","version":"1.0","type":"link"}