HIFI Lossless 150W*2 Output Power Built-in 19435200 Transistors Bluetooth5.2 Home Audio Amplifier

GRESENG Audiophile Amplifier | Bluetooth Lossless | KTV & Home 2-Channel HIFI High-Fidelity | High-Power Preamplifier Product Description This product upholds the core spirit of industrial design, integrates modern aesthetic thinking, outlines the body contour with simple and smooth lines, and flexibly uses modern metal materials. It skillfully combines elegant artistry with quality life needs, creating a quiet, warm and comfortable auditory and visual experience, suitable for various home audio-visual scenarios. Equipped with a high-end precision dynamic dot-matrix VFD display, the faint blue LCD dot-matrix subtitles are clear and soft. All operation and playback information can be presented clearly and sharply. The operation logic is simple and intuitive, no complicated debugging is required, and all kinds of information are clear at a glance for easy use. Adopting 24K gold-plated pure copper RCA terminals, it has excellent signal transmission performance, which can effectively reduce data loss during signal transmission, ensure high-sensitivity signal transmission, and present a sweet, balanced, transparent and natural sound quality with outstanding resolution to restore music details. Equipped with high-quality relays, the signal input adopts relay conversion technology, which can effectively avoid signal loss, further improve the separation of channels, make the sound quality output purer and more stable, and reduce sound quality loss caused by interference. The whole machine is configured with two pairs of high-power Toshiba 1943/5200 transistors for amplification output. Each pair of amplifier tubes is carefully selected and strictly matched to ensure high consistency of their performance. This makes the power amplifier's high frequency delicate and transparent with clear texture, mid frequency mellow and rich, low frequency full in volume and powerful in momentum, with a wide frequency response range, suitable for playing various music styles. Ruby electrolytic capacitors are selected, with excellent quality and sound performance; matched with 2 high-end custom filter capacitors, it takes into account both quality and sound quality, and has strong power supply reserve capacity, which can provide stable power supply for the whole machine, make the low-frequency texture stronger and dive deeper, and improve the overall sound quality thickness. Equipped with OPA1612A professional audio op-amp with ultra-high resolution, its core advantage is that the CMRR (Common Mode Rejection Ratio) value is extremely stable, remaining unchanged at 120dB from 1Hz to 80KHz, ensuring excellent high resolution in the entire audio frequency band and accurately restoring music details. Equipped with a resin-filled pure copper transformer, it can not only provide a steady stream of abundant power for the whole machine, making the power amplifier output sound powerful, but also the resin filling design can effectively eliminate current noise, reduce interference, make the sound quality purer and the listening experience more comfortable. Supports USB local playback function, compatible with mainstream lossless music formats such as APE, FLAC and WAV, and also supports common compressed music formats such as MP3 and WMA, which can restore the true texture of music to the greatest extent and meet the music file playback needs of different users. Supports Bluetooth 5.2 wireless reception, getting rid of the shackles of wired connection, making it more convenient and elegant to use. It can stably connect to most devices with Bluetooth function on the market, easily realize wireless music playback, and adapt to various audio source devices such as mobile phones, tablets and computers. Equipped with one set of optical fiber input and one set of coaxial input, and a high-performance pre-stage decoding configuration, which can ensure the true high-fidelity restoration of music signals; after careful tuning by professional tuners, it strives to return to the true nature of music, making every note keep its original flavor and every thread of melody clear and distinct. Supports independent bass and treble adjustment function. Users can flexibly adjust the sound quality according to their own preferences, music style and playback environment, effectively eliminate the adverse effects caused by standing waves, resonance and other factors, and easily restore the real texture of the music scene. The interface configuration is rich and complete, including optical fiber/coaxial digital input, AUX input, XLR balanced interface, and CD/DVD signal input, which can meet the needs of simultaneous connection of multiple devices. Even if there are many audio-visual devices at home, it can be easily adapted without additional adapters. Product Parameters Power Output: 150W + 150W Signal-to-Noise Ratio: >100dB (A-weighted) Frequency Response: 20Hz–20kHz Input Sensitivity: 250mV/47kΩ Output Sensitivity: 0.707V/1kΩ Output Impedance: 4–8Ω (with short-circuit protection) Audio Inputs: AUX, CD, balanced XLR, Bluetooth, optical fiber, coaxial, lossless USB Lossless Signal Switching: Signal input uses relay switching for zero signal loss and improved channel separation Premium Components: All electrolytic capacitors are Japanese Rubycon, while other capacitors are German Wima Professional Chip: The pre-stage input operational amplifier uses the OPA1612A from Burr-Brown (UK) Power Tubes: Original Toshiba (5200+1943) imported tubes; rectifier bridge stack is Japanese SanKen Power Supply: All-copper transformer with resin noise reduction treatment Tone Control: Bass/treble adjustment and direct-pass option; treble/bass: ±10dB adjustable Product Dimensions: 340 × 430 × 122mm Net Weight: 8.6kg Q: Can I change my order info? Such as receiving address or item purchased? A: Order info cannot be changed after being placed. Please cancel your order and place a new one if order info is incorrect. Otherwise your parcel is going to be shipped according to the initial order info. Q: Why isn’t my order being shipped out of China? A: If there is no further tracking info after 10 days. It is most likely due to domestic shipping issue. For further support, please contact our customer service. Q: Why is my parcel still “delivering”? A: International shipment can be time-consuming and your patience is appreciated. Please rest assured if you see no update about your parcel. We use AliExpress shipping methods which can take 15 to 60 days. For further support, please contact our customer service. Q: Why do I receive a different product? A: Please contact our customer service directly for further support. Q: Why do I receive only 1 item while several were purchased in the first place? A: One order can possibly be shipped via several parcels with each of them a unique tracking number. Please track them according to the specific tracking number(s). Please contact our customer service directly for further support. Q: I clicked “Confirm Goods Received” before the parcel is received. What should I do? A: Don’t worry if you clicked it by accident. Your parcel is shipped soonest possible anyway. Simply follow the tracking number for update. A 5-star review is much appreciated upon receiving your parcel. Q: What should I do if my order is closed? A: Please place a new order with a secure account and payment method. Q: What if the product cannot be used? A: Please ensure the product is used properly according to the user manual. For further support please contact our customer service directly. Q: I haven’t received my parcel yet but it shows “delivered” on the order detail page. What should I do? A: Please check with your local post first for the parcel info. For further support, please contact our customer support. Q: Why is my parcel returned? A: That’s because receiving address or phone number being incorrect or the logistics company cannot ship to your address. Please reach out to our customer service directly if the issue persists.