---
product_id: 729829577
title: "Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter"
brand: "fosi audio"
price: "48349 Lei"
currency: RON
in_stock: true
reviews_count: 8
url: https://www.desertcart.ro/products/729829577-fosi-audio-m04-100w-subwoofer-amplifier-mini-stereo-mono-power
store_origin: RO
region: Romania
---

# Switchable SUB/PBTL modes 100W powerful output Smooth volume control knob Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter

**Brand:** fosi audio
**Price:** 48349 Lei
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your home audio game with bass that speaks louder than words!

## Quick Answers

- **What is this?** Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter by fosi audio
- **How much does it cost?** 48349 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/729829577-fosi-audio-m04-100w-subwoofer-amplifier-mini-stereo-mono-power)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Crystal-Clear Sound:** Built-in speaker protection and low-pass bass filter ensure zero background noise and pristine audio clarity.
- • **Pure Bass Powerhouse:** 100W output at 4 ohms delivers deep, room-filling bass that commands attention.
- • **Compact & Sleek Design:** Miniature footprint fits seamlessly on any tabletop without sacrificing performance or style.
- • **Versatile Mode Switching:** Easily toggle between subwoofer and full-range mono amplifier modes for ultimate audio flexibility.
- • **Reliable Support & Warranty:** Includes 24-month warranty and 24/7 online service for a worry-free, premium audio experience.

## Overview

The Fosi Audio M04 is a compact 100W subwoofer amplifier featuring the advanced TPA3116 chip and NE5532 amplifier for superior bass performance. It offers switchable modes between subwoofer and mono amplifier, smooth volume control, and built-in speaker protection with a low-pass filter to deliver clean, powerful sound. Designed for home theater and media rooms, it comes with a power adapter, user manual, and a 24-month warranty backed by 24/7 customer support.

## Description

Full description not available

## Features

- 100W Mini Subwoofer Amplifier: The Fosi Audio M04 is a passive super woofer amplifier with a TPA3116 chip and NE5532 amplifier, with 100W output at 4 ohm to drive most household bass, mono speakers, and the volume control knob glides smoothly
- USE AS A SUB AMMPER OR MONO AMPER: Fosi Audio M04 features a mode switcher that allows you to easily switch between SUB and PBLT modes and selector to switch between subwoofer base amplifier and full-range mono amplifier
- Built in Speaker Protection Circuit and Low Pass Bass Filter: This amplifier improves passive subwoofer bass response with frequency control of subwoofers, it is practical and strong. Optimized circuitry ensures zero background noise
- A home Hi-Fi amplifier that allows for deep, crisp, low-range acoustics in a dedicated home theater system or media room. Designed for customers who want HiFi sound
- Product Accessories & Aftermarket Service: Fosi Audio M04 Amplifier x 1, 19V/4.74A Power Adapter x 1, AC Cable x 1, User Manual x 1, 24 Months Warranty and 24 Hours Online After Service to make you a pleasant shopping experience. If you have any questions, please feel free to contact us through desertcart

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Fosi Audio |
| Part number | M04 |
| Item Weight | 450 g |
| Product Dimensions | 13.21 x 8.89 x 3.56 cm; 450 g |
| Is Discontinued By Manufacturer | No |
| Color | Black |
| Power source type | Power cord type |
| Voltage | 12 Volts (DC) |
| Wattage | 100 W |
| Mounting Type | table top |
| Included Components | Instructions |
| Batteries Included | No |
| Batteries Required? | No |
| Item Dimensions LxWxH | 13.2 x 8.9 x 3.6 cm |

## Product Details

- **Item dimensions L x W x H:** 13.2 x 8.9 x 3.6 cm
- **Voltage:** 12 Volts (DC)
- **Manufacturer:** Fosi Audio
- **Maximum Supply Voltage:** 24 Volts (DC)
- **Minimum Supply Voltage:** 12 Volts (DC)

## Images

![Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter - Image 1](https://m.media-amazon.com/images/I/51473rdAG8L.jpg)
![Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter - Image 2](https://m.media-amazon.com/images/I/71OJsaadu1L.jpg)
![Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter - Image 3](https://m.media-amazon.com/images/I/71cIoqncjML.jpg)
![Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter - Image 4](https://m.media-amazon.com/images/I/71KRBb3b9PL.jpg)
![Fosi Audio M04 100W Subwoofer Amplifier Mini Stereo Mono Power Amplifier for TPA3116 Chip PBTL Home Audio and Video with Power Adapter - Image 5](https://m.media-amazon.com/images/I/71ZQeKJXcKL.jpg)

## Available Options

This product comes in different **Model** options.

## Questions & Answers

**Q: Will this power up passive subwoofers ?**
A: Yes, absolutely. That's the reason I bought it and it works just fine without spending a whole lot of money.

**Q: How hot does this amp run?  The unit I currently use is very hot to the touch even after a short while.**
A: This thing seems cool no issues

**Q: What is the input voltage range?**
A: Not sure what your question is about.  If you mean input power, it's spec'd. at 12-24 vdc.  It comes with a power brick rated at 19 vdc, 4.47 amps.  Input sensitivity is =< 280 mv...

**Q: I have a Harman Kardon reciver with a single rca sub connection. What cables do i need to hook my sub to this amp and the amp to my reciever**
A: You need 1/8 audio plug to RCA adapter ..

## Customer Reviews

### ⭐⭐⭐⭐⭐ 小さな巨人
*by N***8 on September 16, 2025*

とにかく小さい 出力 性能は十分 モノラルでローパスフィルター値を自由に変えられるのは便利です シンプル 小さいのでケーブルで本体が動くのが困る。。 もう一回り大きくてもいいのかな

### ⭐⭐⭐⭐⭐ 低音が魅力的
*by パ***パ on January 18, 2025*

低音調整が簡単に、自分の好きな音に合わせれます。

### ⭐⭐⭐⭐ 値段から見ると良い物
*by M***O on April 24, 2025*

アンプが壊れたウーファーをパッシブ化して使用しています。若干パワー不足かと感じていたが、しばらく使用していたら、まあこんな物か？と思えてきた。パワーオンがボリュームなので、スイッチ式が良かった。あとはオートパワーオフがあると便利かな。

## Frequently Bought Together

- Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer
- FosPower RCA Y-Adapter (3 Feet), 1 RCA Male to 2 RCA Male Short Y Splitter Digital Stereo Audio Cable for Subwoofer, Home Theater, Hi-Fi - Dual Shielded | 24K Gold Plated
- Tan QY 2RCA to 2RCA Cable 3Ft, Gold-Plated 2 RCA Male to 2 RCA Male Stereo Audio Cable for Home Theater, HDTV, Gaming Consoles, Hi-Fi Systems (3Ft/1M)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-23*