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
Amazing Combination: As an integrated tu
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Detail
- Output: Passive Speakers Output, Pre-Out, 3.5mm Headphone Output
- SNR≥100dB; THD≤0.03%; Bluetooth Codecs: SBC, AAC
- Power Supply: 24V 4.5A
1Analog/Digital Input2Compact Design3Multifunctional4Visual Dial5DIY Tubes1Tone Tuning2Remote Control3One-Click Switching4Aluminum Alloy Chassis1Vinyl Experience2Desktop Audio3Wireless Streaming4Home Theater1. Check Connections & 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.
2. Optimize Setup & 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.
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.
Quick Tips:
- Using a Turntable? Ensure it has a built-in phono preamp or connect an external one (required for proper volume).
- Bluetooth Stability: Check if the antenna is securely installed and keep it away from other wireless devices (e.g., Wi-Fi routers).
- Power Supply: Ensure you are using the correct power supply (24V 4.5A for 69W output; 24V 8.5A for maximum 105W output).
- Warm-Up Time: Allow the vacuum tubes to warm up for 10-15 minutes after powering on to ensure stable performance.
PS: Sampling Rate--USB: 24bit/96kHz; OPT/COA: 24bit/96kHz
The volume is very low when connecting the turntable to the MC331. Do I need a turntable preamp?
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.
Q: What is the purpose of the pre-out port on the MC331?
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.
Can headphones and passive speakers play simultaneously?
The MC331 defaults to headphone output priority. To use speaker output, you need to disconnect the headphones first.
What tube models are compatible for replacement?
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.
Tube Integrated Amplifier
All-in-One DAC Amp/Headphone Amp
Catering to Most Audio Sources
Maximize Space Efficiency
Hybrid Tube Integrated Amplifier
Pointer Dances to the Music
JAN 5725W Vacuum Tubes
Customize Your Unique Sound
Easy to Set up and Intuitive to Operate
Memory Function
CNC Integrated Design
Friendly Solutions Guide
The volume is very low when connecting the turntable to the MC331. Do I need a turntable preamp?
Q: What is the purpose of the pre-out port on the MC331?
Can headphones and passive speakers play simultaneously?
What tube models are compatible for replacement?
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