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.

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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

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

Product ID: 677084389

Details

Brand
Fosi Audio
Item dimensions L x W x H
5.94 x 5.31 x
Manufacturer
Shenzhen Co.
Mounting Type
Freestanding
Voltage
110 Volts (AC)

💡Vintage 5725W vacuum tubes + VU meter

📡Bluetooth + USB/Opt/Coax/RCA inputs

🔊105W x2 power output

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Description

🎶 Vintage warmth meets modern power — amplify your audio lifestyle!

COMPACT YET MIGHTY - Delivers 105W per channel in a sleek design that fits perfectly on your desktop.
PLUG PLAY VERSATILITY - Supports Bluetooth, USB, coaxial, optical, and RCA inputs for any audio source.
RETRO VIBES MODERN SOUND - Experience warm, rich tones with iconic 5725W tubes and eye-catching VU meter glow.
TAILORED LISTENING COMFORT - Remote control bass/treble adjustments and replaceable tubes let you customize your sound.
ALL IN ONE AUDIO POWERHOUSE - Seamlessly integrates DAC, amp, preamp & headphone amp for ultimate convenience.

The Fosi Audio MC331 is a compact, 2-channel tube integrated amplifier featuring 105W per channel output, built-in DAC, and versatile input options including Bluetooth, USB, optical, coaxial, and RCA. Its vintage 5725W vacuum tubes and VU meter combine classic aesthetics with warm, rich sound. Designed for HiFi bookshelf speakers and headphones, it offers remote-controlled tone adjustments and replaceable tubes for personalized audio experiences.

Specifications

ASIN	B0DM1VLXHN
Best Sellers Rank	#8,485 in Electronics ( See Top 100 in Electronics ) #34 in Audio Component Amplifiers
Brand	Fosi Audio
Built-In Media	MC331;Bluetooth Antenna;Vacuum Tube2;Tube Cover2; 24V4.5A Power Adapter;Remote
Customer Reviews	4.4 4.4 out of 5 stars (428)
Item Weight	4.2 Pounds
Manufacturer	Shenzhen Foresight Technology Co., Ltd.
Mfr Part Number	MC331
Model Number	MC331
Warranty Description	24 Months Manufacturer

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$316.42

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In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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