{"product_id":"a1-888-8th-gen-hi-fi-amplifier-board-mjl4281-mjl4302-class-ab-dual-channel-short-amp-thermal-protection","title":"A1-888 8th Gen Hi-Fi Amplifier Board, MJL4281\/MJL4302, Class AB, Dual Channel, Short and Thermal Protection","description":"\u003cp\u003e\u003cb\u003eDescription:\u003c\/b\u003e\u003cbr\u003eBuilt for Audiophiles. 8th Generation Officially Launched\u003cbr\u003e- Our mission is to make top-tier products with excellent sound quality, superior build and first-class service. \u003cbr\u003e- This final version focuses on sound quality improvement with optimized circuitry, upgraded decoupling capacitors, upgraded front-end signal processing chips, and a modified bridge circuit for easier external wiring installation.\u003cbr\u003e- Sound performance is significantly improved by 30%.\u003cbr\u003e- We also optimized the speaker protection circuit with added output short-circuit protection to better safeguard your expensive speakers, making the amp board more stable and reliable.\u003cbr\u003e- The 8th generation upgrade adds decoupling filter capacitors for lower noise and purer sound.\u003cbr\u003e\u003cbr\u003eSix Major Functions\u003cbr\u003e- Bridgeable to mono output\u003cbr\u003e- Upgraded output short-circuit protection\u003cbr\u003e- Adjustable midpoint voltage to 0mV\u003cbr\u003e- Overheat protection\u003cbr\u003e- Intelligent temperature-controlled fan\u003cbr\u003e- Dual-chip audio processing\u003cbr\u003e\u003cbr\u003ePremium Components\u003cbr\u003e- Great sound requires high-quality materials.\u003cbr\u003e- We use selected imported audiophile-grade audio components.\u003cbr\u003e- Imported green-shell capacitors: specially designed for HIFI amplifiers, high quality and long lifespan.\u003cbr\u003e- German capacitors for Wima: low loss, high stability, natural sound performance.\u003cbr\u003e- US military-grade resistors: high precision, low loss, non-inductive and durable.\u003cbr\u003e- Imported Japanese differential pair tubes: stable performance, reliable quality, transparent and smooth sound.\u003cbr\u003e\u003cbr\u003eWith proper matching, it can compete with amplifiers worth over ten thousand yuan.\u003cbr\u003e- Treble: transparent and delicate\u003cbr\u003e- Mid-range: bright and smooth\u003cbr\u003e- Bass: deep and powerful\u003cbr\u003e\u003cbr\u003eFive Major Upgrades in Final Version\u003cbr\u003e1. Upgraded chip for significantly improved sound quality\u003cbr\u003e2. Upgraded 0mV midpoint voltage adjustment for better stability\u003cbr\u003e3. Added output short-circuit protection\u003cbr\u003e4. Upgraded bridge switch for external wiring\u003cbr\u003e5. Added decoupling capacitors\u003cbr\u003e\u003cbr\u003eProduct Upgrade Details\u003cbr\u003e- Upgraded 14-pin audio chip combined with dual differential circuit improves overall sound quality by 30%.\u003cbr\u003e- Sound is transparent, sweet, warm, full, layered with strong and controlled bass.\u003cbr\u003e- Added midpoint voltage adjustment circuit, output midpoint voltage stabilized at 0mV, circuit works in balanced and stable state for outstanding natural sound.\u003cbr\u003e- Safety \u0026amp; Reliability: Upgraded dual relays, high-current output, added output and speaker short-circuit protection to avoid damage from accidental short circuits. Also includes delay protection, overheat protection and overload protection.\u003cbr\u003e- Bridge Output: Newly upgraded one-key bridge switching, convenient and practical. Bridge output power is doubled with strong driving force and more transparent sound. Bridge switch supports external wiring installation.\u003cbr\u003e- Imported power amplifier tubes for ON Semiconductor: 16pcs MJL4302\/MJL4281, ensuring high power and excellent sound quality.\u003cbr\u003e- Great circuit with premium materials: carefully designed and tuned by professional audio engineers with years of experience.\u003cbr\u003e- Operates in quasi-Class A mode for transparent, warm, tube-like sound, performing close to Class A amplifiers.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cbr\u003e- Model: A1-888\u003cbr\u003e- Channel: Dual channel\/Bridge mono\u003cbr\u003e- Main power supply: Dual DC ±50–88V (for 35V–62V transformer)\u003cbr\u003e- Speaker protection power: AC 12–18V (independent winding)\u003cbr\u003e- Output power: 8Ω\/400W+400W; 4Ω\/800W+800W\u003cbr\u003e- Bridge mono power: 1800W at 8Ω\u003cbr\u003e- Distortion: 0.001%\u003cbr\u003e- Frequency response: 10Hz–180kHz\u003cbr\u003e- Speaker impedance: 4–8Ω\u003cbr\u003e- Amplifier type: Ultra Class AB\/Quasi-Class A\u003cbr\u003e- Dimensions: 24.5cm (L) × 11.6cm (W) × 8.3cm (H)\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePacking List:\u003c\/b\u003e\u003cbr\u003e- 1 × Power Amplifier Board\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackaging Details:\u003c\/b\u003e\u003cbr\u003e- Weight: 1.5kg\u003cbr\u003e\u003cbr\u003e\u003cimg style=\"width: 790px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101028\/101028-01.jpg\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"color: #ff0000;\"\u003eNote:\u003cbr\u003e- The picture above is for display only. Please refer to the actual product received.\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Thanksbuyer","offers":[{"title":"Default Title","offer_id":41028920377393,"sku":"101028","price":162.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4790\/6353\/files\/1773123546-1.jpg?v=1780360952","url":"https:\/\/www.thanksbuyer.com\/es\/products\/a1-888-8th-gen-hi-fi-amplifier-board-mjl4281-mjl4302-class-ab-dual-channel-short-amp-thermal-protection","provider":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products,  Audio Amplifer and Decoders","version":"1.0","type":"link"}