{"product_id":"cayin-soul170p","title":"Cayin Soul 170P A Class Tube Power Amplifier","description":"\n\u003ch3\u003e\u003cstrong\u003eCayin Soul 170P\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eFlagship Class A Push-pull KT170 Tube Power Amplifier\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Soul 170P is our latest power amplifier built upon over 32 years of Cayins expertise in vacuum tube amplification. Designed to deliver exceptional musicality and power, it adopts a Class A architecture with powerful TUNG-SOL KT170 tubes. This is also the very first time weve implemented Class A amplification in our Soul series amplifier, aiming to present a fresh and emotional take on the KT170 sound.\u003c\/p\u003e\n\u003cp\u003eThe Soul 170P offers both Stereo and Mono operating modes to accommodate speakers with higher power demands.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTubes \u0026amp; Topology\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Soul 170P are four TUNG-SOL KT170 beam tetrodes, operating in a Class A push-pull configuration. The amplifier also features:\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003e\u003cstrong\u003eVoltage Amplification Tubes: 2 × 12AU7\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eIn the voltage amplification stage, two JJ 12AU7 tubes are responsible for initial signal gain, providing the necessary voltage amplification before driving the output stage. Their low distortion and noise characteristics contribute to stable signal handling.\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003e\u003cstrong\u003eDriver Tubes: 2 × 6SN7\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eEmployed in the driver stage, the JJ 6SN7, known for its musicality and powerful drive, contributes to a sound thats both emotionally engaging and analytically revealing.\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003e\u003cstrong\u003eRectifier Tube: 1 × 17AX4GT\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eThis classic rectifier tube supplies a stable DC voltage to the driver stage, ensuring reliable performance and a refined sound with beloved tube body musical expression.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFlexible Operating Modes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStereo Mode: \u003c\/strong\u003e60W (Ultralinear, per channel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMono Mode: \u003c\/strong\u003e120W (Ultralinear, per channel)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUsers can easily switch between Stereo and Mono operation using a secure rear-panel switch, allowing the Soul 170P to be used in both two-channel and high-power mono configurations.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eNegative Feedback Circuitry\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTo achieve a more refined and natural sound presentation, the Soul 170P employs a carefully tuned Negative Feedback (NFB) circuit. Cayin engineers applied a moderate global feedback loop, striking a balance between control and musical expression.\u003c\/p\u003e\n\u003cp\u003eIn addition, the Soul 170P features two selectable NFB levels\u003cstrong\u003eHigh \u003c\/strong\u003eand \u003cstrong\u003eLow\u003c\/strong\u003eallowing users to fine-tune the amplifiers sound signature.\u003c\/p\u003e\n\u003cp\u003eChoose \u003cem\u003eLow \u003c\/em\u003efor a more open, expressive, and emotionally engaging sound, or \u003cem\u003eHigh \u003c\/em\u003efor tighter control, improved precision, and a more analytical presentation. This flexibility allows the Soul 170P to fully showcase their character across a wide range of speakers and musical genres.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDynamic Auto Bias\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Soul 170P features a fully integrated Dynamic Auto Bias servo circuit, allowing seamless power tube replacement without manual adjustment. This system precisely regulates the operating status of each KT170 tube, ensuring optimal matching and extending tube lifespanall while maintaining operational safety and tube longevity.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eComponent Selection \u0026amp; Internal Build\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe amplifier is hand-assembled with point-to-point wiring, ensuring low signal loss, minimum crosstalk and interference. Key components include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSilver-plated internal wiring\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAluminum alloy anti-resonance feet\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomized hand-wounded Toroidal power transformer \u003c\/strong\u003eand \u003cstrong\u003eEI wide-band output transformer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eProtective Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube soft-start circuit \u003c\/strong\u003e(60-second delay)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMCU-controlled protection logic\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMI indicators \u003c\/strong\u003e(to detect power tube faults and automatically engage safety mode)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eConnectivity\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs: \u003c\/strong\u003e1 × \u003cstrong\u003eXLR\u003c\/strong\u003e, 1 × RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker Terminals: \u003c\/strong\u003e4Ω and 8Ω outputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Output Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eStereo Mode\u003c\/strong\u003e: 32W + 32W (RMS, Triode mode)\n\u003cp\u003e60W + 60W (RMS, Ultralinear mode)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMono Mode\u003c\/strong\u003e: 64W (RMS, Triode mode)\u003c\/p\u003e\n\u003cp\u003e120W (RMS, Ultralinear mode)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8Hz  70kHz (3dB, RCA\/XLR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Harmonic Distortion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.2% (1W\/1kHz); less than 2% at rated output power\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\u003e105dB (RCA, A-weighted)\n\u003cp\u003e102dB (XLR, A-weighted)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e820mV (NFB: LOW)\n\u003cp\u003e960mV (NFB: HIGH)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4Ω, 8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Terminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × RCA (pair), 1 × XLR (pair)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTubes Used\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKT170 × 4\n\u003cp\u003e12AU7 \/ ECC82 × 2\u003c\/p\u003e\n\u003cp\u003e6SN7 × 2\u003c\/p\u003e\n\u003cp\u003e17AX4GT × 1\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e430mm × 420mm × 238mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e37.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Power Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e420W (Maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n","brand":"Cayin","offers":[{"title":"Default Title","offer_id":51937949679882,"sku":"CAYIN-2311","price":5977.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/3283\/6618\/files\/cayin-soul-170p-a-class-tube-power-amplifier-48736-p.webp?v=1760360676","url":"https:\/\/audioemotion.co.uk\/products\/cayin-soul170p","provider":"Audio Emotion Limited","version":"1.0","type":"link"}