---
product_id: 449234251
title: "Bluetooth Subwoofer Amplifier 2.1, BT30D Pro Subwoofer Amp with TPA3255 Chips 165W x2+350W & Bass Treble Control, 2.1 Channel Sub Amplifier for Desktop/Outdoor/Bookshelf Speakers"
brand: "fosi audio"
price: "€ 193.30"
currency: EUR
in_stock: true
reviews_count: 8
category: "Fosi Audio"
url: https://www.desertcart.it/products/449234251-bluetooth-subwoofer-amplifier-2-1-bt30d-pro-subwoofer-amp-tpa3255
store_origin: IT
region: Italy
---

# Bluetooth 5.0 with 15m stable range 165W x2 + 350W power output Precise bass & treble control knobs Bluetooth Subwoofer Amplifier 2.1, BT30D Pro Subwoofer Amp with TPA3255 Chips 165W x2+350W & Bass Treble Control, 2.1 Channel Sub Amplifier for Desktop/Outdoor/Bookshelf Speakers

**Brand:** fosi audio
**Price:** € 193.30
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your sound game—big power, precise control, zero compromise!

## Quick Answers

- **What is this?** Bluetooth Subwoofer Amplifier 2.1, BT30D Pro Subwoofer Amp with TPA3255 Chips 165W x2+350W & Bass Treble Control, 2.1 Channel Sub Amplifier for Desktop/Outdoor/Bookshelf Speakers by fosi audio
- **How much does it cost?** € 193.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/449234251-bluetooth-subwoofer-amplifier-2-1-bt30d-pro-subwoofer-amp-tpa3255)

## 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

- • **Compact Yet Durable:** Sleek all-metal chassis combines premium craftsmanship with a minimal footprint, perfect for desktop or bookshelf setups.
- • **Powerhouse Performance:** Unleash 680W total output for crystal-clear, distortion-free sound that fills any room or outdoor space.
- • **Plug & Play Versatility:** Effortless integration with passive speakers and subwoofers—transform your existing system into a high-end audio powerhouse.
- • **Tailored Bass Experience:** Dual subwoofer controls let you dial in perfect bass frequency and volume for immersive, personalized audio.
- • **Seamless Wireless Streaming:** Bluetooth 5.0 ensures rock-solid connectivity up to 15 meters—stream your favorite playlists without interruption.

## Overview

The Fosi Audio BT30D PRO is a compact 2.1 channel Bluetooth amplifier delivering a robust 165W x2 + 350W output via high-end TPA3255 chips. Featuring precise bass and treble controls, Bluetooth 5.0 connectivity with a 15m range, and a durable all-metal build, it’s designed to upgrade desktop, bookshelf, or outdoor speaker systems with clean, distortion-free sound and customizable bass. Ideal for audiophiles seeking powerful, flexible audio enhancement in a sleek package.

## Description

Buy Fosi Audio Bluetooth Subwoofer Amplifier 2.1, BT30D Pro Subwoofer Amp with TPA3255 Chips 165W x2+350W & Bass Treble Control, 2.1 Channel Sub Amplifier for Desktop/Outdoor/Bookshelf Speakers: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Big Sound for Small Price! - This amp is perfect for my listening habits. Plenty of power, nice clean signals, interfaces easily to my powered subwoofer. Plenty loud! Its footprint is so tiny, its amazing the sound it produces. And the price is less than $100. Would be great for a desktop sound system. Bluetooth is super easy and very strong. The unit cannot be controlled with a dedicated remote, which is sort of a downer, but if you're using Bluetooth predominantly -like me, your phone controls the sound, so no problem. You must supply your own cable for the subwoofer connection and for the speakers. Setup was a snap! If you have a small room for listening, this product will please you with a big sound for a small price.
Review: Absolutely Incredible Amp – Perfect Replacement for Dead Speaker Systems - This amplifier is outstanding. I originally bought the Klipsch ProMedia 2.1 system, but the amplifier was dead on arrival. Instead of replacing the entire speaker system again, I bought this Fosi Audio amp for roughly the same price—and it completely transformed my setup. I hooked it up to my existing subwoofer and speakers, and the sound quality is phenomenal. Clean, powerful, and punchy bass with excellent control. If you have a speaker system with a failed or weak built-in amplifier, this is an excellent solution. It brought my system back to life. I went with the upgraded version (the higher-power 165W model), and I highly recommend it even if you’re running smaller speakers. The extra headroom makes a real difference in clarity and dynamics without distortion. I’m using it with my computer, and the Bluetooth feature is a huge bonus. I can stream music directly from any device with zero hassle. Rock-solid connection and great sound over Bluetooth as well. I honestly don’t know why I waited so long to buy this. If you’re on the fence, don’t be. This amp punches way above its price.

## Features

- 2.1 Channel Amplifier:The BT30D PRO integrated amplifier features two sets of passive speaker outputs and one set of passive subwoofer outputs, making it easy to set up a 2.1 home theater or other stereo HiFi audio systems.
- High Power with Exceptional Sound Quality:Equipped with two high-end Texas Instruments TPA3255 Class-D amplifier chips, the amplifier home audio delivers clear and pure sound without distortion or clipping, stably outputting up to 165W x 2 + 350W of power.
- Bass Beast:Whether you're a gamer, movie buff, or music lover, the subwoofer amplifier provides tight, smooth, and natural - sounding bass. It features two dedicated knobs for subwoofer control: the SUB FREQ knob allows precise frequency adjustment of passive subwoofers from 0 to 300 Hz, while the SUB VOL knob lets you set the desired volume level. This gives you full control over the bass output to suit your personal preferences and listening environment.
- Bluetooth 5.0 Connectivity:This Bluetooth amplifier maintains a stable connection and delivers clear audio over a range of up to 15 meters. This makes it perfect for enjoying your favorite tunes or audio content in outdoor areas such as your yard, terrace, or poolside, without worrying about signal drop - outs or interruptions.
- Exquisite Craftsmanship:This mini amplifier is meticulously crafted with a solid, all - metal body that ensures durability and longevity. The well - designed case, along with the high - quality controls and connectors, exudes a sense of premium build and attention to detail. The exquisite packaging further adds to the overall appeal and value of the bass amp.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09YNBHR73 |
| Audio Output Mode | Stereo |
| Audio Output Type | Speakers |
| Best Sellers Rank | #7,498 in Electronics ( See Top 100 in Electronics ) #19 in Audio Component Amplifiers |
| Brand | Fosi Audio |
| Built-In Media | 32V/5A Power Supply x1, Bluetooth Antenna x1, Fosi Audio BT30D PRO Subwoofer Amplifier x1, User Manual x1 |
| Color | Black |
| Compatible Devices | Speaker |
| Connectivity Technology | Bluetooth, RCA |
| Connector Type | RCA |
| Control Method | Remote |
| Controller Type | Android |
| Customer Reviews | 4.4 out of 5 stars 1,547 Reviews |
| Format | WAV, WMA |
| Item Height | 1 inches |
| Item Type Name | Bluetooth Amplifier |
| Item Weight | 1.5 Pounds |
| Manufacturer | Fosi Audio |
| Model Number | BT30D PRO |
| Number of Channels | 3 |
| Other Special Features of the Product | Built-In Bluetooth |
| Output Power | 50 Watts |
| Output Wattage | 165 Watts |
| Special Feature | Built-In Bluetooth |
| Surround Sound Channel Configuration | 2.1 |
| Unit Count | 1.0 Count |
| Warranty Description | 24 Month Manufacturer |
| Wattage | 165 watts |
| Wireless Technology | Bluetooth |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** Fosi Audio
- **Color:** Black
- **Compatible Devices:** Speaker
- **Connectivity Technology:** Bluetooth, RCA
- **Connector Type:** RCA
- **Controller Type:** Android
- **Item Weight:** 1.5 Pounds
- **Special Feature:** Built-In Bluetooth
- **Surround Sound Channel Configuration:** 2.1

## Images

![Bluetooth Subwoofer Amplifier 2.1, BT30D Pro Subwoofer Amp with TPA3255 Chips 165W x2+350W & Bass Treble Control, 2.1 Channel Sub Amplifier for Desktop/Outdoor/Bookshelf Speakers - Image 1](https://m.media-amazon.com/images/I/51ai7X4dnLL.jpg)

## Questions & Answers

**Q: What is the subwoofer frequency crossed at?**
A: According to the Fosi site, the 'sub freq' knob does exactly what you would expect, acts as a variable crossover point control. ""...adjustable 40-300Hz cutoff frequency for subwoofer...  It doesn't say what the slope of the cutoff is.

**Q: Are they screw fasteners for the speaker wires?**
A: The unit has a set of combination binding pot/RCA connections. So it will accept bare wires or RCA connectors for your speakers.

**Q: has any one used this with a non powered sub, and did it sound OK ?**
A: William, I have this Fosi amp for a small patio sound system. I do have a sub speaker but it is powered and not passive. I am 100% satisfied with the sound of my system. The Bluetooth works great as well as the aux input. This however does not answer your question but I may give you something to consider. According to Fosi specs, the rated output is 50 watts + 50 watts + 100 watts. I deduce that to mean 50 watts for each left & right speaker and 100 watts for sub speaker. That should be a sufficient 2 to 1 ratio for output division. Fosi also states that the output can be increased with an option 8 amp power supply, but they don’t state exactly how much the output increases. Whether or not a passive sub speaker would “sound ok” has many other variables, ie: size of speaker, sensitivity of speaker, speaker material, type of enclosure that houses speaker, if the enclosure is ported and if the port is tuned properly, if speaker is front firing or down firing, acoustical environment, etc, etc. It is possible a passive mode that the sub speaker may not “sound” satisfactory but may not be the fault of the Fosi amp. I hope this was helpful.

**Q: I see in some reviews that there should be a bluetooth/rca switch on the back , but no switch exists on mine. how do i switch to bt and pair it?**
A: For the BT30D theres a power switch on the front.  When you turn it on it activates the Bluetooth, but uses the RCA jacks until you actually pair a device via Bluetooth.  Just unpair the Bluetooth if you want to use a turntable or DAC.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Big Sound for Small Price!
*by P***O on January 7, 2026*

This amp is perfect for my listening habits. Plenty of power, nice clean signals, interfaces easily to my powered subwoofer. Plenty loud! Its footprint is so tiny, its amazing the sound it produces. And the price is less than $100. Would be great for a desktop sound system. Bluetooth is super easy and very strong. The unit cannot be controlled with a dedicated remote, which is sort of a downer, but if you're using Bluetooth predominantly -like me, your phone controls the sound, so no problem. You must supply your own cable for the subwoofer connection and for the speakers. Setup was a snap! If you have a small room for listening, this product will please you with a big sound for a small price.

### ⭐⭐⭐⭐⭐ Absolutely Incredible Amp – Perfect Replacement for Dead Speaker Systems
*by T***. on January 9, 2026*

This amplifier is outstanding. I originally bought the Klipsch ProMedia 2.1 system, but the amplifier was dead on arrival. Instead of replacing the entire speaker system again, I bought this Fosi Audio amp for roughly the same price—and it completely transformed my setup. I hooked it up to my existing subwoofer and speakers, and the sound quality is phenomenal. Clean, powerful, and punchy bass with excellent control. If you have a speaker system with a failed or weak built-in amplifier, this is an excellent solution. It brought my system back to life. I went with the upgraded version (the higher-power 165W model), and I highly recommend it even if you’re running smaller speakers. The extra headroom makes a real difference in clarity and dynamics without distortion. I’m using it with my computer, and the Bluetooth feature is a huge bonus. I can stream music directly from any device with zero hassle. Rock-solid connection and great sound over Bluetooth as well. I honestly don’t know why I waited so long to buy this. If you’re on the fence, don’t be. This amp punches way above its price.

### ⭐⭐⭐⭐⭐ Unbelievably Musical Amp, Just stunned By the Sound Quality!
*by A***Y on May 26, 2025*

So for people reading this thinking why the glowing review, let me tell you first what my main system is. My speakers are B&W Nautilus 804’s with Nautilus 800 HTM 1 center, 805 surrounds and SVS height speakers for Dolby Atmos powered by a Denon AVR-X4700H. This amp and speakers in no way compares nor could it. For my computer, I bought a Cambridge Soundworks package containing The BassCube 821 and the MC 105 speakers about 13+ years ago. The BassCube has a down firing 6.5” polypropylene woofer (4 ohm) in a sealed box that also contained the amplifier for the three speaker system. The MC 105 (8 ohm) has a 1” aluminum dome tweeter with a 3” midrange in a sealed cabinet. The system was similar in design and appearance to the Klipsch ProMedia 2.1. Unfortunately, my system finally failed after years of service leaving me searching for a suitable replacement for that particular location and purpose. What failed was the amplifier that powered all 3 speakers. The power supply filter caps failed taking out components down line – not worth fixing. I considered the Klipsch ProMedia 2.1 but the long wait time and some reviews mentioning early failures and sound issues made me hesitant. My next choice was the Edifier S350DB which is larger than the Klipsch and my Cambridge system and it too had it’s detractors and is $400. So, I tried the Fosi Audio Bluetooth Subwoofer Amplifier 2.1, BT30D Pro and was blown away by the sound. Connecting it to the MC 105’s was easy as I just needed good speaker cable with with banana plugs at one end for the amp and twisted wire for the speakers. The 6.5” subwoofer speaker I connected internally directly to the existing speaker terminals. I first removed the wires from the internal amp and used two of the four speaker terminals on the back to connect the woofer to the sub input on the Fosi. Then I put all the screws back into the back panel of the subwoofer to close it making a good air tight seal. Previously, the bass coming from the BassCube 821 when it worked was boomy at times and sloppy it wasn’t tight and certainly didn’t go deep. Now it feels tightly controlled, musical and it goes way deeper. It seems to have more synergy with the MC 105’s which also sound more musical to the point that I actually listen to music while working on the computer instead of watching TV. Your mileage may vary based on the speakers you use but at this price point for me at least it was worth the try and I am amazed/surprised at the audible results. The amp has just the right settings to tailor the sound to your speakers and preference. The separate Bass and Treble are mainly for the smaller speakers and have little effect on the subwoofer. For the sub you have SUB FREQ which sets the cutoff point from deep bass going clockwise on up and SUB VOL which together give the ability to tailor the sound to your liking. I bought a power strip that turns on the monitor and the amp when the computer powers up so I don’t have switch it on and off, the TrickleStar TS1104 7 Outlet APS, 1080 Joules, 3 ft Cord White sold on Amazon https://www.amazon.com/TrickleStar-TS1104-Outlet-1080-Joules/dp/B0B61ZCPK6. Now when I turn on the computer everything turns on by itself, the amp and the monitor. So if you have a dead Cambridge or Klipsch system and are handy with a soldering iron or if you have speakers you really like but their current amplification is not so great, give these a try, you might be pleasantly surprised. BTW, I have received nothing in return for this review. All the best: Art If you found the review helpful, give me a thumbs up - Thanks!

## Frequently Bought Together

- Fosi Audio Bluetooth Subwoofer Amplifier 2.1, BT30D Pro Subwoofer Amp with TPA3255 Chips 165W x2+350W & Bass Treble Control, 2.1 Channel Sub Amplifier for Desktop/Outdoor/Bookshelf Speakers
- Banana Plugs with Dual Set Screws,Black and Red Aluminum Shell,6 Pairs
- Amazon Basics Speaker Cable, Easy Assembly, 16-Gauge, Bronze, 100 ft

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-28*