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Returnable until 31 Jan 2026
Returnable until 31 Jan 2026
For the 2025 holiday season, eligible items purchased between 1 November and 31 December 2025 can be returned until 31 January 2026.
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Product support included
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Fosi Audio M04 Subwoofer Amplifier for Home TheaterFosiAudioDirect
  • Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer Rated 100W MAX
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Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer Rated 100W MAX

4.4 out of 5 stars 484 ratings
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About this item

  • High-Performance Mono Amplifier:The Fosi Audio M04 is a mono amplifier designed for driving passive subwoofers or speakers. It features the Texas Instruments TPA3116 chip and NE5532 op-amp, providing an output power of 100 watts for a 2-ohm subwoofer or speaker.
  • Enhanced Bass Response:The M04 SUB amp is designed to improve the bass response of passive subwoofers. It features a selector switch that allows the user to switch between subwoofer bass amplifier and full-frequency mono amplifier modes.
  • Compact and Robust Design:This mini amp has a small and robust design with a built-in low pass filter for subwoofers and a sub frequency control, making it practical and powerful. It uses highly efficient Class D technology that remains cool under demanding loads and doesn't take up much space.
  • Superior Sound Quality:The home subwoofer amplifier can produce a deep, crisp, and clean low-frequency sound effect, making it an excellent addition to dedicated home audio receivers & amplifiers. It has been designed to enhance the sound and performance of your audio system at an affordable price.
  • Complete Package:What You Get: M04 subwoofer amp x1, 19V/4.74A power supply x1, user manual x1.

Product information

Technical Details

Brand ‎Fosi Audio
Manufacturer ‎Fosi Audio
Place of Business ‎ShenZhen city, Guangdong province 518000,CN
Model ‎M04
Part Number ‎M04
Processor Brand ‎Texas Instruments
Special features ‎Great Sound Quality, Small Amp for Subwoofer;
Number of Items ‎1
Color Screen ‎No
Speakers maximum output power ‎100 Watts
Speaker Amplification Type ‎Passive
Output Wattage ‎100 Watts
Voltage ‎12 Volts (DC)
Wattage ‎100 watts
Power source type ‎Ac 110v - 240v
Batteries included ‎No
Batteries Required ‎No
Mounting type ‎Freestanding
Includes rechargable battery ‎No
Manufacturer ‎Fosi Audio
Item model number ‎M04
Product Dimensions ‎13.21 x 8.89 x 3.56 cm; 450 g
ASIN ‎B07942M4MC

Additional Information

Date First Available Feb. 6 2018
Customer Reviews
4.4 out of 5 stars 484 ratings

4.4 out of 5 stars
Âé¶¹Çø Rank
Is discontinued by manufacturer No

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Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer Rated 100W MAX


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Product Description

Subwoofer Amplifier for Home Theater

Mini Subwoofer Amplifier Full-Frequency Mono Stereo Amp

Mini Subwoofer Amplifier Full-Frequency Mono Stereo Amp
Mini size and solid shell

Subwoofer Amplifier for Home Theater

Power Adapter: 19V/4.74A DC Input Range: 12V-24V

Terminating Impedance: 2 Ohm - 8 Ohm Bass Frequency Range: 20-200Hz

MAX Power Output: 100Watt @4Ohm

Full Frequency Response Range: 20Hz-20KHz(¡À 3db)

Input Sensitivity: ¡Ü 0.2mV SNR ¡Ý 106dB THD ¡Ü0.03%

Subwoofer Amplifier TPA3116
Subwoofer Amplifier TPA3116

Mode Switching

Switch to PBTL, it's a Full-Frequency Mono amp for driving passive speakers. Switch to SUB, it's a subwoofer amplifier for diving passive subwoofers.

Subwoofer Amplifier TPA3116

DIY Your Audio System

This amplifier gives you the power and versatility you need to create a professional sound system. Great amp to drift most home bookshelf speakers or subwoofers.