{"product_id":"sugden-masterclass-ia-4-pure-class-a-integrated-amplifier","title":"Sugden Masterclass IA-4 Pure Class A Integrated Amplifier","description":"\u003ch1\u003eSugden Masterclass IA-4 – Pure Class A Integrated Amplifier\u003c\/h1\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Sugden Masterclass IA-4 is the flagship integrated amplifier in the Masterclass range, combining pure Class A amplification with a substantial power supply, refined analogue control and a built-in MM phono stage.\u003c\/strong\u003e Designed for listeners who value tonal richness, spatial depth and long-term musical engagement, it offers a focused alternative to feature-heavy amplifiers.\u003c\/p\u003e\n\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\n\u003cp\u003e\nThe IA-4 builds on Sugden’s long experience with pure Class A amplification. Its output stage develops 33 watts per channel into 8 ohms, supported by a larger power supply and upgraded smoothing and output capacitors compared with the A21 series.\n\u003c\/p\u003e\n\n\u003cp\u003e\nA bespoke preamplifier section, gold-plated circuit boards, relay input switching and a precision selector contribute to a clean, carefully controlled signal path. The amplifier is handcrafted in Yorkshire by a single skilled technician.\n\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNatural musical presentation:\u003c\/strong\u003e pure Class A operation is designed to preserve low-level detail, tonal texture and dynamic flow.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated vinyl support:\u003c\/strong\u003e the built-in MM phono stage allows direct connection of a compatible turntable.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible analogue connectivity:\u003c\/strong\u003e line-level, tape, phono and balanced inputs accommodate a well-developed stereo system.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem expansion:\u003c\/strong\u003e variable pre-out and fixed output connections support additional amplification or recording equipment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong-term ownership:\u003c\/strong\u003e substantial construction and hand assembly reflect Sugden’s emphasis on durability and serviceability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePure Class A integrated amplifier\u003c\/li\u003e\n  \u003cli\u003e33 watts per channel into 8 ohms\u003c\/li\u003e\n  \u003cli\u003eThree line-level inputs\u003c\/li\u003e\n  \u003cli\u003eOne tape input\u003c\/li\u003e\n  \u003cli\u003eBuilt-in Moving Magnet phono input\u003c\/li\u003e\n  \u003cli\u003eOne balanced input\u003c\/li\u003e\n  \u003cli\u003eVariable preamplifier output\u003c\/li\u003e\n  \u003cli\u003eFixed output and loudspeaker output\u003c\/li\u003e\n  \u003cli\u003eRemote-controlled volume, RC5 compatible\u003c\/li\u003e\n  \u003cli\u003eGold-plated circuit boards and relay switching\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\n\u003cp\u003e\nThe Sugden Masterclass IA-4 is intended for serious two-channel systems built around high-quality analogue and digital sources. It is particularly relevant for listeners who prefer musical coherence and tonal refinement over extensive digital processing or network features.\n\u003c\/p\u003e\n\n\u003cp\u003e\nIts 33-watt Class A output should be matched thoughtfully with loudspeakers of suitable sensitivity and impedance, especially where larger rooms or very high playback levels are involved.\n\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eProduct type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003ePure Class A stereo integrated amplifier\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e3 × line level, 1 × tape, 1 × MM phono, 1 × balanced\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eVariable pre-out, fixed output, loudspeaker output\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eLine input sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e125 mV\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003ePhono input sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e2 mV MM\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003ePower output\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e33 W per channel into 8 Ω\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eFrequency response\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e14 Hz–200 kHz, ±1 dB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eBandwidth\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e6 Hz–300 kHz\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSignal-to-noise ratio\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eGreater than 84 dB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eDimensions (H × W × D)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e165 × 430 × 440 mm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eGross packed weight\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e20 kg\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eManufacture\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eHandcrafted in Yorkshire, England\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy We Selected This Product\u003c\/h2\u003e\n\n\u003cp\u003e\nAt ExclusivIT, we value amplifiers with a clear purpose and a coherent engineering philosophy. The IA-4 does not attempt to be a streamer, DAC or home cinema hub. Instead, it concentrates on high-quality analogue amplification, careful construction and a direct connection to the music.\n\u003c\/p\u003e\n\n\u003cp\u003e\nIts combination of pure Class A operation, useful analogue connectivity and built-in MM phono support makes it a compelling foundation for a refined stereo system. For customers who appreciate Sugden’s understated design and natural presentation, the IA-4 deserves serious consideration.\n\u003c\/p\u003e","brand":"SUGDEN AUDIO","offers":[{"title":"Titanium","offer_id":54644043579715,"sku":"SUGDEN-MSIA4","price":8500.0,"currency_code":"EUR","in_stock":true},{"title":"Graphite","offer_id":54644043612483,"sku":"SUGDEN-MSIA5","price":8500.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/2080\/2883\/files\/1ba66a_98aba0fa7f754ce686c8c1af4b9be19e.avif?v=1784282413","url":"https:\/\/www.exclusivit.eu\/products\/sugden-masterclass-ia-4-pure-class-a-integrated-amplifier","provider":"ExclusivIT","version":"1.0","type":"link"}