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
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Availability:
20 left in stock
Arrives
Friday, May 22
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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.
Features
- Advanced 2.1CH Bluetooth 5.0 Receiver Amplifier achieves HiFi music quality, the best choice for your home audio entertainment. You can connect passive speakers/passive subwoofer/powered speakers/powered subwoofer to DIY a stereo sound system.
- Fosi Audio BT30D Pro is the upgraded version for BT30D. All-NEW Black Aluminum Appearance. BT30D VS BT30D Pro: MAX Power Output: 50 Watt x2+100 Watt VS 165 Watt x2+350 Watt, Amplifier Chip: TPA3116D2 VS TPA3255. Output: RCA output for powered subwoofers VS 3.5MM full-range output for powered subwoofers and speakers. Just choose one model for your needs.
- BT30D Pro Adopts 2PCS Texas Instruments TPA3255 high-performance Class-D power amplifier chip. BT30D Pro can drive up to 2 x 175 W into 4- load and 2 x 220 W into 3- load. In addition to excellent audio performance, TPA3255 achieves both high power efficiency and very low power stage idle losses below 1 W. This is achieved through the use of 60 m MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.
- Professional wireless amp with subwoofer frequency, SUB volume, master volume/bass/treble control. No pop sound, no audible noise during the connection. Have a good time with Hifi music journey.
- What You Get: BT30D Pro Amp x1, power supply x1, user manual x1, our worry-free 18-month warranty, and friendly customer service.
Product Dimensions: 6 x 5 x 1 inches
Item Weight: 1.5 pounds
Item model number: BT30D Pro
Date First Available: February 4, 2021
Manufacturer: Fosi Audio
Country of Origin: China
Manufacturer: Fosi Audio
Brand: Fosi Audio
Mfr Part Number: BT30D Pro
Model Number: BT30D PRO
Unit Count: 1.0 Count
Warranty Description: 24 Month Manufacturer
Item Weight: 1.5 Pounds
Item Type Name: Bluetooth Amplifier
Built-In Media: 32V/5A Power Supply x1, Bluetooth Antenna x1, Fosi Audio BT30D PRO Subwoofer Amplifier x1, User Manual x1
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, May 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I am very happy with this purchase, to the point where the product deserves a review! Build quality and appearance are excellent, sound is very good, and the price is right. NOTE: you NEED BANANA PLUGS. The little plastic screw tightener on the speaker lug strips, at least if you try to tighten it enough to have a decent connection of any kind. They're pretty but not very functional. NOTE2: get short, insulated banana plugs, the kind with a non-metal outer shaft, because they otherwise might tilt and touch each other. (see picture) The TPA3255 chip does *not* have short circuit protection, so you need to be extra careful! [edit] You want banana plugs with an insulating shell, heat shrink tubing, or just some electrical tape. See picture. The amazon basics and FosPower Deadbolt plugs are large enough to be almost touching, and although the shells are anodized, they're still metal. Anyway, you have been warned; just don't short out the connections! :) Application: I am using it with a pawn shop sub and a pair of old Radio Shack Optimus diecast aluminum speakers (the last descendant of the old Minimus speakers, basically they sound great but have zero bass). The sub is 4 ohms and supposedly handles 200W RMS (dual-6" speakers, really?) and the Optimus speakers nicely handle 50W RMS (8 ohms) but only if it's all midrange and treble. It's a bedroom stereo, so it's primary goal is to sound good quiet, but I do sometimes need to wake up. And I like bass. :D I bought the bundle with the 48v5A power supply, which because I have 8 ohm speakers and like to play music loud sometimes. :D Math suggests that ideally (and nothing is ideal), the power supply can deliver 240W to the whole system, and have enough voltage to drive the (4 ohm) subs to no more than 140W and the (8 ohm) tops to about 70W (RMS). In practice it seems to deliver. It's basically a perfect match for the 50W tops, while the sub surprisingly handles all of the supplied power until the amp runs out of headroom. (The sub channel distorts gracefully.) I have not attached a scope to see what the *actual* power output is, but AFAICT power is limited by the power supply voltage and speakers, not the amp itself, which is consistent with modern digital power amps. The whole system sounds good: as good as those speakers have ever sounded. :) The treble and bass controls are unintrusive, neutral at center-ish settings, and work. I wish the treble had a little more boost and cut, but I'll take "unintrusive" over "more boost" any day. The subwoofer has plenty of gain, and the frequency control has a smooth rolloff-- I used it to tame the peak at the top of the sub's frequency range a little. The system distorts gracefully when pushed. I primarily use bluetooth. This and the old technology of the speakers appears to be the only limiting factors for tone. A good system, would buy again.
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Reviewed in the United States on October 31, 2025 by tekHedd
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!
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Reviewed in the United States on May 26, 2025 by Art the Science Guy
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.
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Reviewed in the United States on January 9, 2026 by Thomas G.