{"product_id":"uotang-mk9800-pure-class-a-power-amplifier-180w-8ω-stereo-and-500w-8ω-bridged-mono-channel-amp","title":"UOTANG MK9800 Pure Class A Power Amplifier 180W 8Ω Stereo and 500W 8Ω Bridged Mono Channel Amp","description":"\u003cp\u003e\u003cspan\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/span\u003e\u003cbr\u003eUOTANG MK9800 HiFi Pure Power Amplifier\u003cbr\u003e* Class A Pure Power Amplifier, 135 Jin Heavy-duty Type\u003cbr\u003e* 5 Core Technologies, Battery-Grade Power Supply System\u003cbr\u003e* Full Symmetrical Fully Balanced, Pure DC Zero-Coupling\u003cbr\u003e* Midpoint Servo Zeroing for Real-Time Output Calibration\u003cbr\u003e* Current Feedback Amplification Architecture to Monitor Output Current in Real Time\u003cbr\u003e* Silicon Steel Sheet with Twill Texture, High Magnetic Flux Iron Core\u003cbr\u003e* Transformer: 1200W+1200W Potting Transformer\u003cbr\u003e* Capacitor Array System: 1.28 Million Microfarad Bank-Grade Capacitor Array System\u003cbr\u003e* CLC Filter System Delivers Nearly Battery-level Pure Power Output\u003cbr\u003e* Battery-Grade Power Supply System with DC Power Purification\u003cbr\u003e* 14-Channel Independent Voltage Stabilization System and Ultra-Low Noise Circuitry\u003cbr\u003e* Matrix of 48 Transistors with Fully Symmetrical Circuit Layout\u003cbr\u003e* Parallel Amplification with Damping Factor of 1000\u003cbr\u003e* Support Stereo Dual-Channel Mode and Bridged Mono Channel Mode\u003cbr\u003e* Dual-Mode Power Amplifier Matrix with Six Wiring Configurations\u003cbr\u003e\u003cbr\u003eFive Core Technologies\u003cbr\u003e* Full Symmetry features a fully symmetrical structure from signal input to output to precisely balance signal paths. \u003cbr\u003e* Full Balance adopts differential amplification architecture across the entire signal chain from input stage to output stage. \u003cbr\u003e* Pure Direct Current uses zero-coupling capacitor design to realize full direct coupling of signal routes. \u003cbr\u003e* Midpoint Servo monitors midpoint voltage of output terminals in real time and calibrates DC offset. \u003cbr\u003e* Current Feedback tracks real-time variations of output current and adjusts input signals promptly.\u003cbr\u003e\u003cbr\u003eFive Major Power Supply Systems for Battery-Grade Power Source\u003cbr\u003e* Twill silicon steel core fits a pair of 1200W+1200W potting transformers. \u003cbr\u003e* Million-level capacitor array system equips a 1.28 million microfarad bank-grade high-capacity energy storage capacitor matrix. \u003cbr\u003e* The CLC filter system sets UOTANG's standard for pure HIFI power supply. \u003cbr\u003e* The DC purification system eliminates DC offset and high-frequency noise to remove hum interference. \u003cbr\u003e* The 14-channel independent voltage stabilization system realizes separated voltage regulation and accurate power distribution for each functional zone.\u003cbr\u003e\u003cbr\u003eA Masterpiece Integrating UOTANG's Professional Amplifier Technologies\u003cbr\u003e* It combines tremendous output power, ultra-low noise circuitry and high damping factor.\u003cbr\u003e* The matrix of 48 premium transistors paired with fully symmetrical circuit builds a flagship-level power amplifier of UOTANG. \u003cbr\u003e* The modular dual-mode amplifier supports stereo dual-channel mode and bridged mono-channel mode. \u003cbr\u003e* Six available wiring options deliver varied acoustic performance and unlock brand-new sound experience. \u003cbr\u003e* Designed to counter back electromotive force, it adopts parallel amplification with a damping factor up to 1000. \u003cbr\u003e* The ultra-low noise circuit system delivers powerful noise suppression capability. \u003cbr\u003e* A triple intelligent protection system monitors overload, short-circuit and overheating risks in real time.\u003cbr\u003e\u003cbr\u003eDual-Mode Amplifier Matrix of UOTANG MK9800 with Six Total Wiring Configurations\u003cbr\u003e1. Stereo Dual-Channel Mode: Standard Wiring (1 unit required)\u003cbr\u003e2. Stereo Dual-Channel Mode: Bi-Wire Crossover Wiring (1 unit required)\u003cbr\u003e3. Stereo Dual-Channel Mode: Switchable Wiring for Two Pairs of Speakers (1 unit required)\u003cbr\u003e4. Bridged Mono-Channel Mode: Standard Wiring (2 units required)\u003cbr\u003e5. Bridged Mono-Channel Mode: Separated Dual-Channel Bi-Wire Crossover Wiring (2 units required)\u003cbr\u003e6. Bridged Mono-Channel Mode: Fully Separated Bi-Wire Crossover Wiring (4 units required)\u003cbr\u003e\u003cbr\u003eFully Symmetrical Architecture for Precise Balanced Signal Path\u003cbr\u003e* The full symmetry design of UOTANG MK9800 is more comprehensive than conventional power amplification symmetry. Every component along the entire signal route from input to output is arranged symmetrically. Components for left and right channels adopt mirrored layout to unify current transmission paths. Strict matching is implemented even for power transistors, which consumes massive working hours for matching dozens of power tubes.\u003cbr\u003e\u003cbr\u003eEquipped with Pure DC Zero-Coupling Amplification Technology\u003cbr\u003e* MK9800 features zero coupling capacitor design to realize full direct coupling throughout the whole signal path. Pure DC zero-coupling amplification breaks the limitation of traditional coupling capacitors, reducing phase distortion and low-frequency roll-off caused by conventional coupling capacitors.\u003cbr\u003e\u003cbr\u003eExtra Component Consumption for Full-Balanced Output Architecture\u003cbr\u003e* From input stage to output stage, the whole signal chain of UOTANG MK9800 adopts differential amplification architecture. Symmetric positive and negative signal paths are transmitted and amplified before combining into complete output signal to filter asymmetric interference. Differential amplification cancels common-mode noise for strong anti-interference performance and purer signal. Full-balanced circuitry suppresses even-order harmonic distortion and maintains consistent signal phase, delivering larger voltage swing, high swing output capability and extended dynamic range.\u003cbr\u003e\u003cbr\u003eMidpoint Servo Zero-Calibration for Real-Time Output Trimming\u003cbr\u003e* The built-in midpoint servo zeroing system of UOTANG MK9800 delivers high-precision dynamic feedback, which monitors midpoint output voltage in real time and automatically calibrates DC offset to refine output signals dynamically. The closed-loop feedback dynamically restrains DC drift at output terminals, protecting hardware, eliminating DC interference fundamentally and upgrading sound performance.\u003cbr\u003e\u003cbr\u003eAdopted Current-Feedback Amplification Architecture\u003cbr\u003e* Different from conventional voltage-feedback audio amplifiers, the current-feedback architecture of UOTANG MK9800 tracks real-time output current variation and adjusts input signals promptly to achieve faster response and lower distortion. Its gain-frequency characteristic barely changes after gain switching, enabling natural and dynamic drive for loudspeakers.\u003cbr\u003e\u003cbr\u003eBattery-Grade Power Supply System Combined with Five Major Power Modules\u003cbr\u003e* Centered on a massive 1,280,000μF super capacitor matrix, this power system integrates high-power inductor-based CLC filtering system and dynamic voltage compensation technology to mimic the purity and instantaneous response of battery-powered supply, achieving performance close to standalone battery feed. Equipped with two high-flux transformers made of twill silicon steel sheets delivering a total peak output of 4000W, it adopts UOTANG's proprietary audio power purification solution to further filter DC offset. With 14 sets of independent linear voltage stabilization circuits for precise power regulation of each functional module, it builds an HIFI-grade power supply superior to conventional mains power and comparable to dedicated batteries, eliminating power bottlenecks for MK9800.\u003cbr\u003e\u003cbr\u003eHigh-Flux Iron Core with Twill-Pattern Silicon Steel Sheets\u003cbr\u003e* The premium sound of MK9800 originates from its custom transformer iron core. The transformer is manufactured with twill silicon steel core plus resin shielding craft; factory-customized high-flux-density twill silicon steel is rolled in specific twill pattern to boost magnetic permeability and cut core loss, efficiently converting mains electricity into audio current. The dual 1200W+1200W transformers deliver a combined peak output of roughly 4000W, fitted with shielding cover and fully encapsulated by epoxy resin, enabling robust, clean low-frequency reproduction and refined extended high-frequency performance for MK9800.\u003cbr\u003e\u003cbr\u003eMillion-Level Capacitor Array System\u003cbr\u003e* UOTANG MK9800 features dam-scale energy reserve of 1,280,000μF, setting a new benchmark for dynamic response among UOTANG power amplifiers. Constructed by eight custom 160000μF capacitors into a total 1,280,000μF energy matrix equivalent to one hundred and twenty-eight 10000μF capacitors, it can theoretically output instant peak current up to 640A. The high-capacity energy storage matrix suppresses power supply voltage fluctuation effectively, delivering continuous stable heavy current to core power amplification circuits, upgrading the amplifier's dynamic response and restraining background noise while restoring intricate music details and clean soundstage. It delivers explosive instantaneous power and sustained stable output, crafting a nearly unrestricted power supply for MK9800.\u003cbr\u003e\u003cbr\u003eCLC Filter System\u003cbr\u003e* UOTANG MK9800 is engineered to purify raw mains power into battery-grade clean current via proprietary UOTANG CLC filter technology that sets the brand's standard for pure HIFI power supply. Combining high-power inductors and million-grade capacitor matrix, the CLC circuit converts alternating mains into ultra-clean current matching battery quality with equivalent dynamic performance, enabling MK9800 to realize dual advantages of battery-level signal purity and unlimited mains-powered continuous operation.\u003cbr\u003e\u003cbr\u003eDC Purification System\u003cbr\u003e* Custom-designed for domestic 220V mains power by UOTANG MK9800, this audio-grade power purification solution targets DC contamination defects of household mains supply. With professional audio DC purification technology, it precisely filters DC offset and high-frequency noise, eliminating the root cause of transformer magnetization to eradicate transformer hum and vibration, building an operating environment nearly free of DC interference for MK9800.\u003cbr\u003e\u003cbr\u003e14-Channel Independent Voltage Stabilization System\u003cbr\u003e* UOTANG MK9800 adopts a separated multi-channel regulated power design to construct a 14-group power supply matrix functioning as a precise power symphony. The audiophile-grade 14 independent regulated power sources deliver partitioned power respectively for input, amplification, protection and control circuits, enabling accurate power allocation and seamless coordinated operation just like a well-orchestrated symphony orchestra.\u003cbr\u003e\u003cbr\u003eModular Dual-Mode Power Amplifier System\u003cbr\u003e* A single unit satisfies basic audio needs while two units deliver upgraded performance, forming an expandable audio ecosystem for continuous upgrade of listening experience.\u003cbr\u003e* Stereo Dual-Channel Mode (1 unit required): Pure Class A amplification, group A\/B output switching and bi-wire crossover available; Output Power: 180W\/8Ω → 360W\/4Ω → 720W\/2Ω\u003cbr\u003e* Bridged Mono-Channel Mode (2 units required): Class AB full-balanced amplification with full-balanced output, independent bridged input \u0026amp; output terminals and bi-wire option; Output Power: 500W\/8Ω → 1000W\/4Ω → 1800W\/2Ω\u003cbr\u003e\u003cbr\u003eSuperior Output Power, Ultra-Low Noise Circuitry \u0026amp; High Damping Factor\u003cbr\u003e* It is easy to boost amplifier power yet difficult to achieve both high output and stable performance. MK9800 realizes breakthroughs in powerful output as well as noise reduction and driver control. Its ultra-quiet circuit eliminates background hum and current noise to fully unveil subtle musical details, while ultra-high damping factor acts as an acoustic stabilizer for accurate control of every note from forceful low-frequency impact to silky smooth high-frequency extension.\u003cbr\u003e\u003cbr\u003eMatrix of 48 Premium Power Transistors with Fully Symmetrical Circuit Layout\u003cbr\u003e* UOTANG MK9800 adopts 48 pieces of MJL4281\/MJL4302 power transistors for Onsemi featuring wide bandwidth and outstanding SOA performance. A single transistor delivers maximum output power of 230W and continuous output current of 15A with peak current hitting approximately 30A, granting robust low-frequency control capability.\u003cbr\u003e* Boasting exceptional linearity and high gain, these components are recognized as premium \"king transistors\" among audiophiles and can effortlessly drive all types of music and speaker loads. \u003cbr\u003e* All 48 transistors go through rigorous binning and crystal matching via elaborate time-consuming workmanship. Combined with the fully symmetrical architecture from the amplifier's five core technologies, it realizes an innovative upgrade from physical symmetry to consistent sound performance in UOTANG's amplifier development history.\u003cbr\u003e\u003cbr\u003eOutput Configuration by Working Mode\u003cbr\u003e* Stereo Dual-Channel Mode: Class-A driven output stage uses 24 parallel push-pull power transistors per channel, delivering linear output power of 180W\/8Ω → 360W\/4Ω → 720W\/2Ω.\u003cbr\u003e* Bridged Mono-Channel Mode: Class-AB driven output stage equips 48 parallel push-pull power transistors per channel, providing linear output power of 500W\/8Ω → 1000W\/4Ω → 1800W\/2Ω.\u003cbr\u003e* The rated 180W nominal power of MK9800 represents a high-current post-stage design where output power doubles as load impedance halves, enabling actual kilowatt-level peak output.\u003cbr\u003e\u003cbr\u003eParallel Amplification with Damping Factor up to 1000\u003cbr\u003e* Each power amplification module of MK9800 is constructed with 24 paralleled power transistors, expanding to 48 parallel devices under bridged configuration to reduce output impedance and achieve ultra-high damping factor. This design enables MK9800 to precisely govern the dynamic response of loudspeakers and fully control every vibration of speaker cones.\u003cbr\u003e\u003cbr\u003eUltra-Low Noise Circuit System with Powerful Noise Suppression Performance\u003cbr\u003e* Centered on ultra-low-noise circuit design, MK9800 balances overall performance, operational reliability and application compatibility. It builds a clean signal transmission path spanning from signal input to power output, maintaining superior noise suppression even when amplifying faint musical details to eliminate background noise and distortion at source.\u003cbr\u003e\u003cbr\u003eElegant Integrated Front Panel Design\u003cbr\u003e* Sharp streamlined contour delivers sophisticated modern industrial aesthetics.\u003cbr\u003e\u003cbr\u003eHeat Dissipation Fins\u003cbr\u003e* Precision polished with black anodizing finish, matrix-arranged fin layout greatly improves heat exchange efficiency.\u003cbr\u003e\u003cbr\u003eDual Protection for Amplifier \u0026amp; Speaker Safety\u003cbr\u003e* UOTANG MK9800 adopts UPC1237 professional protection IC from Japan to establish triple intelligent protection system that monitors overload, short-circuit and overheating status in real time for precise safeguard even under high-volume peak playback. Equipped with ten 16A relays (for OMRON) for speaker protection and switching, it protects your HIFI audio system against risks per industrial-grade safety standards.\u003cbr\u003e\u003cbr\u003eEvery Refined Detail Delivers Premium Performance\u003cbr\u003e* A, B, A+B Speaker Output Switching: MK9800 is equipped with dual A\/B output terminals to connect two pairs of speakers simultaneously. Users can switch playback between Group A and Group B speakers or drive both sets at the same time.\u003cbr\u003e* Independent Bridged Input \u0026amp; Output Terminals: Bridged mono mode features dedicated input and output ports. It combines Group A and Group B outputs to realize professional bi-wire speaker connection.\u003cbr\u003e* Pure DC Direct-Coupled Amplification and Full-Band Flagship Design: From signal input to driving current output, the entire signal path adopts capacitor-free direct coupling design, eliminating phase distortion on low frequency caused by conventional coupling capacitors.\u003cbr\u003e* MCU-Level Control Chip for Intelligent Secure Operation: Built-in industrial-grade control MCU governs all functional modules reliably; all functions are triggered via tactile push-buttons for smooth, premium operating feel.\u003cbr\u003e* Audiophile-Grade Premium Components: The input buffer stage is fitted with NE5532D 16-pin operational amplifier for PHILIPS, delivering superior sonic performance versus OPA2604.\u003cbr\u003e* Premium Selected Raw Materials \u0026amp; Strict Quality Control: All resistors across the entire amplifier adopt Taiwan Miloz six-band high-precision resistors, featuring an ultra-low temperature drift coefficient of 25PPM, outperforming conventional 718-series resistors.\u003cbr\u003e* Audio Input Relay Switch for Precise Signal Switching: Ultra-minimal contact impedance for negligible signal loss. Pure mechanical switching introduces minimal sonic contamination; manual trigger drives the relay while the relay body stays isolated from the audio signal path.\u003cbr\u003e* Solid CNC-Machined Aluminum Feet \u0026amp; Full-Aluminum Heat Sinks: Vibration-dampening solid aluminum foot pads processed by precision CNC with embedded rubber shock-absorbing gaskets. Thickened full-aluminum front panel plus integrated machined aluminum heat sinks ensure outstanding thermal dissipation efficiency.\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan\u003eImportant Reminders: \u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e* Power Supply Notice: For optimal performance, connect UOTANG MK9800 to an independent high-current power strip or dedicated wall outlet. Avoid sharing the socket with other electronics to eliminate power bottlenecks caused by shared power accessories.\u003cbr\u003e* Weight \u0026amp; Handling Notice: Solidly built, MK9800 weighs 67.5kg, far heavier than conventional power amplifiers. Even two adult males struggle with transportation. To prevent casing damage, a minimum of 2~3 people are required for moving. Plan the placement spot in advance according to its dimension and weight. Users with lumbar discomfort shall avoid lifting the unit to prevent physical injury.\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan\u003eSpecifications:\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e* Dimensions: W 43cm x H 29cm (with foot pads) x D 57cm (with binding posts)\u003cbr\u003e* Rated Output Power: \u003cbr\u003e   ** Stereo Dual-Channel Mode (20–20kHz, music signal): 180W\/CH at 8Ω, 360W\/CH at 4Ω, 720W\/CH at 2Ω\u003cbr\u003e   ** Bridged Mono Mode: 500W\/CH at 8Ω, 1000W\/CH at 4Ω, 1800W\/CH at 2Ω\u003cbr\u003e* Nominal Load Impedance: 2–16Ω\u003cbr\u003e* Total Harmonic Distortion (THD): ＜0.005% at 4–16Ω, 20–20kHz (both channels operating)\u003cbr\u003e* Intermodulation Distortion (IMD): ＜0.01%\u003cbr\u003e* Frequency Response: 20–20kHz (+0~-0.1dB) at rated continuous average output; 3–100kHz (+0~-3dB) at 1W output test\u003cbr\u003e* Damping Factor: 1000 at 8Ω, 50Hz\u003cbr\u003e* Input Impedance: 40kΩ for balanced input; 20kΩ for RAC input\u003cbr\u003e* Input Sensitivity: 0.87V for rated continuous full power output; 0.11V for 1W output\u003cbr\u003e* Signal-to-Noise Ratio: 125dB\u003cbr\u003e* Power Supply: 220V\/50Hz (110V version customizable)\u003cbr\u003e* Net Weight: 67.5kg (135 Jin)\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cb\u003ePacking List:\u003c\/b\u003e\u003c\/span\u003e\u003cbr\u003e* 1 x Set of Power Amp\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan\u003ePackaging Details:\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e* Package weight: 71.5kg\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003eNote:\u003cbr\u003e* Battery is not included.\u003cbr\u003e* 110V version is optional. Please contact us if it is needed.\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-01.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-02.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-03.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-04.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-05.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-06.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-07.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.comseek.com\/image\/catalog\/102543%20c\/102566-08.jpg\"\u003e\u003c\/p\u003e","brand":"UOTANG","offers":[{"title":"110V","offer_id":41111002578993,"sku":"102566  110V","price":4183.48,"currency_code":"USD","in_stock":true},{"title":"220V","offer_id":41111002611761,"sku":"102566 220V","price":4183.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4790\/6353\/files\/102566-1.jpg?v=1783327415","url":"https:\/\/www.thanksbuyer.com\/fr\/products\/uotang-mk9800-pure-class-a-power-amplifier-180w-8%cf%89-stereo-and-500w-8%cf%89-bridged-mono-channel-amp","provider":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products,  Audio Amplifer and Decoders","version":"1.0","type":"link"}