{"product_id":"fosi-audio-mc331-tube-integrated-amplifier-with-dac-2-channel-home-audio-stereo-power-amp-for-hifi-bookshelf-speakers35mm-headphones-vintage-vu-meter-preamp-with-bluetooth-and-usboptcoaxrca_625ae928","title":"Fosi Audio MC331 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers\/3.5mm Headphones, Vintage VU Meter Preamp with Bluetooth and USB\/Opt\/Coax\/RCA","description":"All-in-One DAC Amp: A DAC. amplifier. preamplifier. and headphone amplifier are all integrated into the Fosi Audio MC331. You can easily switch between audio sources with the help of the remote control. ensuring a seamless and enriched listening experience\u003cbr\u003eAmazing Combination: As an integrated tube DAC amp with a VU meter. the visual aesthetics of the 5725W vacuum tubes and VU meter add a nice warm and soft effect to not only the appearance but the sound as well. giving the modern look a retro feel\u003cbr\u003eSetup Flexibility: It supports Bluetooth. USB. coaxial. optical. and RCA inputs. making it compatible with a variety of sources such as computers. phones. CD players. turntables with built-in phono preamps. etc.. allowing you to build various systems\u003cbr\u003eCompact Yet Powerful: The MC331 only takes up minimal desktop space but boasts a maximum power output of 105W x2@4Ω. effectively driving your bookshelf speakers. Additionally. it has a pre-out and a 3.5mm headphone output. making it versatile enough\u003cbr\u003eUser-Friendly Design: The MC331 comes with a remote control. allowing you to adjust bass and treble from the comfort of your listening chair. Its replaceable tube design lets you customize the sound signature to suit your personal preferences\u003cbr\u003e\u003cli\u003eOutput: Passive Speakers Output. Pre-Out. 3.5mm Headphone Output\u003c\/li\u003e\u003cli\u003eSNR≥100dB; THD≤0.03%; Bluetooth Codecs: SBC. AAC\u003c\/li\u003e\u003cli\u003ePower Supply: 24V 4.5A\u003c\/li\u003e1Analog\/Digital Input2Compact Design3Multifunctional4Visual Dial5DIY Tubes1Tone Tuning2Remote Control3One-Click Switching4Aluminum Alloy Chassis1Vinyl Experience2Desktop Audio3Wireless Streaming4Home Theater\u003cp\u003e 1. Check Connections \u0026amp; Device Compatibility: --Ensure all audio cables are fully inserted and undamaged. Replace any frayed cables with high-quality shielded ones (recommended: cables with metal connectors).-- Confirm your speakers' power rating (e.g.. 50W\/100W) and impedance (e.g.. 4Ω\/8Ω) match the amplifier's requirements (see product manual). If your speakers have an impedance outside the 4-8Ω range. they may not work optimally with the MC331. -- Avoid raising the volume beyond your speakers' labeled maximum (e.g.. “Max 80%\") to prevent distortion. \u003c\/p\u003e\u003cp\u003e 2. Optimize Setup \u0026amp; Audio Sources: -- Speaker Placement: Use high-resolution speakers placed at least 30cm away from walls or corners. Add rugs or curtains to reduce echoes. -- Audio Quality: Play lossless music formats (e.g.. FLAC. WAV) on dedicated devices (e.g.. music players or updated phones\/computers). -- Bluetooth Compatibility: Ensure your device supports SBC and AAC Bluetooth formats. Keep the Bluetooth device within 10 meters of the amplifier and minimize obstacles. \u003c\/p\u003e\u003cp\u003e 3. Reduce Environmental Interference: -- Anti-Interference Cables: Use shielded RCA cables with grounding (metal-shell connectors) to minimize buzzing. -- Distance from Interference: Keep audio\/Bluetooth cables ≥30cm away from routers. power outlets. or microwaves. -- Troubleshoot Sources: Test the same song on another phone\/computer. If the noise persists. contact support for assistance. \u003c\/p\u003e\u003cp\u003e Quick Tips: \u003c\/p\u003e\u003cp\u003e - Using a Turntable? Ensure it has a built-in phono preamp or connect an external one (required for proper volume). \u003c\/p\u003e\u003cp\u003e - Bluetooth Stability: Check if the antenna is securely installed and keep it away from other wireless devices (e.g.. Wi-Fi routers). \u003c\/p\u003e\u003cp\u003e - Power Supply: Ensure you are using the correct power supply (24V 4.5A for 69W output; 24V 8.5A for maximum 105W output). \u003c\/p\u003e\u003cp\u003e - Warm-Up Time: Allow the vacuum tubes to warm up for 10-15 minutes after powering on to ensure stable performance. \u003c\/p\u003e\u003cp\u003e PS: Sampling Rate--USB: 24bit\/96kHz; OPT\/COA: 24bit\/96kHz \u003c\/p\u003e\u003cli\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cp\u003e The volume is very low when connecting the turntable to the MC331. Do I need a turntable preamp? \u003c\/p\u003e\n\u003cp\u003e If your turntable does not have a built-in preamp. you will need to add a separate phono preamp (such as the BOX series). If your turntable has a built-in preamp. make sure it's set to LINE mode to output the signal properly. \u003c\/p\u003e\n\u003c\/li\u003e\u003cli\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cp\u003e Q: What is the purpose of the pre-out port on the MC331? \u003c\/p\u003e\n\u003cp\u003e The MC331 has a pre-out port that can be connected to a powered subwoofer. speaker. or another amplifier with passive speakers for better sound quality. \u003c\/p\u003e\n\u003c\/li\u003e\u003cli\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cp\u003e Can headphones and passive speakers play simultaneously? \u003c\/p\u003e\n\u003cp\u003e The MC331 defaults to headphone output priority. To use speaker output. you need to disconnect the headphones first. \u003c\/p\u003e\n\u003c\/li\u003e\u003cli\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cp\u003e What tube models are compatible for replacement? \u003c\/p\u003e\n\u003cp\u003e The following tube models are compatible: EF95. 6AK5. 6AK5W. 403A\/403B. 6J1. 6J1P. 6J2. 6J3. 6J4. 6J5. among others. You can test and choose based on your personal preference. \u003c\/p\u003e\n\u003c\/li\u003e\u003ch1\u003e Tube Integrated Amplifier\u003c\/h1\u003e\u003ch3\u003e All-in-One DAC Amp\/Headphone Amp \u003c\/h3\u003e\u003ch4\u003e Catering to Most Audio Sources \u003c\/h4\u003e\u003ch4\u003e Maximize Space Efficiency \u003c\/h4\u003e\u003ch4\u003e Hybrid Tube Integrated Amplifier \u003c\/h4\u003e\u003ch4\u003e Pointer Dances to the Music \u003c\/h4\u003e\u003ch4\u003e JAN 5725W Vacuum Tubes \u003c\/h4\u003e\u003ch4\u003e Customize Your Unique Sound \u003c\/h4\u003e\u003ch4\u003e Easy to Set up and Intuitive to Operate \u003c\/h4\u003e\u003ch4\u003e Memory Function \u003c\/h4\u003e\u003ch4\u003e CNC Integrated Design \u003c\/h4\u003e\u003ch1\u003e Friendly Solutions Guide \u003c\/h1\u003e\u003ch3\u003e\u003c\/h3\u003e\u003cp\u003e The volume is very low when connecting the turntable to the MC331. Do I need a turntable preamp? \u003c\/p\u003e\u003ch3\u003e\u003c\/h3\u003e\u003cp\u003e Q: What is the purpose of the pre-out port on the MC331? \u003c\/p\u003e\u003ch3\u003e\u003c\/h3\u003e\u003cp\u003e Can headphones and passive speakers play simultaneously? \u003c\/p\u003e\u003ch3\u003e\u003c\/h3\u003e\u003cp\u003e What tube models are compatible for replacement? \u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":56622352302422,"sku":"657725643455070208-39317544-0-0-0-0-0-0","price":41.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1077\/8243\/9254\/files\/bc3a31ea7949b00f50206e602261f7365d1fa992c6f1cc4d376f742a6e4fbefc.jpg?v=1794669157","url":"https:\/\/7sv1mkz5.cfd\/products\/fosi-audio-mc331-tube-integrated-amplifier-with-dac-2-channel-home-audio-stereo-power-amp-for-hifi-bookshelf-speakers35mm-headphones-vintage-vu-meter-preamp-with-bluetooth-and-usboptcoaxrca_625ae928","provider":"7rp0rp-11","version":"1.0","type":"link"}