--- product_id: 90732501 title: "BT30D" brand: "fosi audio" price: "763 zł" currency: PLN in_stock: true reviews_count: 9 category: "Fosi Audio" url: https://www.desertcart.pl/products/90732501-bt30d store_origin: PL region: Poland --- # Bluetooth 5.0 with 50ft range 200W max output power Adjustable sub volume & frequency BT30D **Brand:** fosi audio **Price:** 763 zł **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound game—because your space deserves more than just noise! ## Quick Answers - **What is this?** BT30D by fosi audio - **How much does it cost?** 763 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/90732501-bt30d) ## 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 - • **Next-Gen Bluetooth 5.0:** Seamless wireless streaming with extended 50-foot range for uninterrupted audio freedom. - • **Precision Bass Control:** Fine-tune your subwoofer’s volume and frequency for a custom Hi-Fi experience tailored to your space. - • **Compact & Stylish Design:** Sleek, mini form factor fits effortlessly in any setup—home or outdoor—without clutter. - • **Advanced TI Amplifier Chips:** Texas Instruments TPA3116D2 ensures high efficiency, crystal-clear sound, and minimal interference. - • **Powerful 2.1 Channel Output:** 50W x2 + 100W dedicated subwoofer channel delivers immersive, room-filling sound. ## Overview The Fosi Audio BT30D is a compact 2.1 channel Class D amplifier featuring Bluetooth 5.0 connectivity, delivering up to 200 watts of power (50W per stereo channel plus 100W for subwoofer). Equipped with Texas Instruments TPA3116D2 chips, it offers high-efficiency, low-distortion audio with adjustable bass controls. Its versatile inputs support both Bluetooth and RCA, making it ideal for driving passive speakers and subwoofers in home or outdoor environments. With a sleek design and stable wireless range up to 50 feet, it’s a perfect blend of power, precision, and convenience for audiophiles and modern living spaces. ## Description Buy Fosi Audio BT30D Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Home Outdoor Passive Speakers/Subwoofer Powered Subwoofer: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Works really well, power supply could be better. Part of a whole desertcart-sourced solution. - Music is a huge and daily part of our lives. Because we don’t like to overdrive the living-room system just to also “light up” the kitchen area with sound, I’ve kept a small (homebrew) 18+18W amplifier and Minimus 77 speakers on top of our fridge for years. It was linked to the living-room system via a stereo audio isolation transformer, and a Bluetooth receiver with an audio switch. Unsightly, but it worked well and sounded nice. With a recent remodeling of the kitchen and living-room areas, a better-looking solution was required. With a 12x12 soffit running in an “L” shape above all of the kitchen cabinets, in-wall speakers were the obvious choice. We ordered a set of Dayton Audio ME625W in-wall 2-way units and as I will get into later, eventually added a Dayton Audio DCS165 subwoofer and quasi-matching grille, all via desertcart. (The Pyle and FOSI amplifiers mentioned here were also desertcart purchases.) My first choice for a new small amp to power this was the Pyle PFA540BT unit with built-in FM radio and Bluetooth features. That unit was bought as an open box from desertcart. While plenty loud, it had a subtle but definite grating midrange distortion once warmed up that I did not notice until it was outside of the return window. My bad, these new parts all sat around while we finished the other renovations. We all agreed it was annoying, even my kids. Additionally, the switch-mode power supply for that amp was so noisy (RF-wise) that the radio receiver only would pull in one station, with a local antenna from only a couple of miles away. The rest of the band was utterly swamped out. (No FCC cert logo visible on the PSU, now we know why). My second amp was a FOSI audio unit, the BT30D, which is much better. No radio, but BT and line in. As a plus, it’s a 2.1 system with a dedicated drive channel for a passive sub. It’s rated at 50+50+100w. It’s plenty loud, however be aware it ships with a switching power supply that can deliver only about half of that wattage. (24v x 4A = 96W). Ah, marketing. With the amp issue sorted, I was still disappointed that the in-walls did not have bass that matched the small mini-77’s that we had listened to for 10 years. Given the larger drivers and volume of trapped air behind the in-walls, I was a little surprised. Research on the FOSI website was not able to tell me if the FOSI unit has a fixed High Pass Filter on the L-R outputs or not, so I was not sure if it was the speakers, or the amp limiting the bass. Everything below about 120Hz was absent. The Pyle amp, which has no amplified sub output, sounded similar in the bass, and a third full-range analog amp I connected in also played with little bass. Conclusion is that it’s the speakers or the install environment, most likely the speakers, as the two are separated by a lot of insulation, preventing any phase cancelling behind the wall. As a result, the stout little Dayton Audio 6-1/2" sub driver was ordered and installed with a ¾” split-baffle as support in the corner of the soffit for best loading. Once set up and adjusted, we now have a system with some decent extension into the 50-100 Hz range and more than enough volume to fill the kitchen area while providing a nice stereo listening field for most of the room. I wish we had the space for a larger sub driver, but with the framing behind the 12x12 soffit, an 8” or 10” just wasn’t going to fit. The 6-1/2” sub is respectable but it’s being driven rather hard to make up for it’s lack of piston area. A second identical unit is being considered, to double the cone area and increase the efficiency, but at least for the moment it sounds nice at reasonable levels. (EDIT: a second identical sub went in, same baffle approach, as close as I could get it to the first, which helped a lot - a little more cone area to grab air - and they are not being driven so hard. The system as of March 2023 is still going strong and used daily - DSB) On balance, the FOSI amp has been very good and well-behaved. It runs a little warm, but for its size it’s punching well above its weight and the BT implementation sounds quite good. It must have a decent SBC buffer scheme, as we don’t experience any buffer under-run drop-outs over long term listening with any of the apple, android or Chromebooks attached. Bluetooth range has also been solid throughout the area. This is probably due to the external no-compromise BT antenna. The amp is small enough not to notice on top of the fridge, and looks pretty smart. I’d buy it again. I will be posting this same review on the Sub and In-Wall speakers pages as well, because it's kind of a system-level review of all the bits and pieces. Review: Absolutely Outstanding—The Power and Control Make All the Difference! - I’m running this Fosi Audio BT30D amp with JBL G50 bookshelf speakers, a Bose 100w passive subwoofer, and a Sony active subwoofer. The power this little unit puts out is honestly unbelievable—it drives all my speakers with ease and sounds fantastic across music and movies. One thing that really stands out is the independent sub volume and frequency controls. These let you dial in your bass exactly how you want it, which is essential when mixing subs and speakers. I spent a lot of time researching amps, and now that I have this one I can’t imagine owning anything else—especially since it pairs perfectly with my gear. If you’re hesitant because your speakers might be able to handle a bit more wattage, stop worrying! This amp handles them no problem, and gives way more control and clarity than anything I’ve tried before. Highly recommended—worth every penny! ## Features - 2.1CH Bluetooth 5.0 Power Amplifier: This amp boasts an exquisite design, enhanced operation, and exceptional sound performance. It delivers a rich and immersive audio experience with its high-quality construction and user-friendly interface. - Versatile Connectivity with BT30D: The amplificador de audio supports both Bluetooth and RCA inputs, making it compatible with a wide range of audio devices. It can effortlessly drive most home passive speakers and both passive and powered subwoofers. With adjustable SUB volume and frequency, as well as bass and treble controls, it ensures a true Hi-Fi music quality tailored to your preferences. - High-Performance Audio Chip: The wireless stereo amplifier is powered by two Texas Instruments TPA3116D2 chips. These advanced stereo digital amplifier chips are designed for high efficiency and performance. They feature an advanced oscillator/PLL circuit with multiple switching frequency options to avoid AM interferences. This ensures high output power and superior audio quality, with a maximum power output of up to 200 watts. - Enhanced Bluetooth Connectivity: This Bluetooth 5.0 stereo audio amplifier receiver offers enhanced stability, improved sound quality, and an extended use distance. It supports a streaming range of up to 50 feet, ensuring seamless connectivity with the latest devices such as smartphones, tablets, laptops, and computers. - What You Get: BT30D audio amplifier x1, 24V/4.5A power supply x1, user manual x1. Everything you need to start enjoying good quality audio is included in the box. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07K7NJ4QN | | Best Sellers Rank | #14,910 in Electronics ( See Top 100 in Electronics ) #71 in Audio Component Amplifiers | | Brand Name | Fosi Audio | | Customer Reviews | 4.4 4.4 out of 5 stars (2,905) | | Item Dimensions | 5.2 x 4.72 x 1.38 inches | | Item Weight | 1.1 Kilograms | | Manufacturer | Fosi Audio | | Maximum Supply Voltage | 24 Volts (DC) | | Minimum Supply Voltage | 24 Volts (DC) | | Model | BT30D | | Mounting Type | Freestanding | | Number of Channels | 3 | | Output Power | 50 Watts | | Specification Met | FCC | | Unit Count | 1.0 Count | | Voltage | 230 Volts | | Warranty Description | 18-month manufacturer | ## Product Details - **Item dimensions L x W x H:** 5.2 x 4.72 x 1.38 inches - **Manufacturer:** Fosi Audio - **Maximum Supply Voltage:** 24 Volts (DC) - **Minimum Supply Voltage:** 24 Volts (DC) - **Voltage:** 230 Volts ## Images ![BT30D - Image 1](https://m.media-amazon.com/images/I/61qfLCG9XzL.jpg) ## Questions & Answers **Q: What are the bass, treble, and subwoofer frequency ranges of the BT30D?** A: Bass and treble frequency range: 20Hz - 20kHz (±12dB) Subwoofer frequency range: 20Hz - 300Hz. **Q: Is there a built-in crossover for the left and right channels on BT30D?** A: No. **Q: Can I connect headphones to the sub out port on BT30D?** A: No. **Q: Does the passive speaker output provide full-range signal on BT30D?** A: The passive speaker outputs send a full-range signal to the speakers; it is unable to remove the low-end frequencies. A bass knob will not change the gain on your amplifier, but the bass level. **Q: What type of port is the sub out on BT30D?** A: The sub out terminal on the back of the BT30D is an RCA output. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works really well, power supply could be better. Part of a whole Amazon-sourced solution. *by D***R on June 10, 2021* Music is a huge and daily part of our lives. Because we don’t like to overdrive the living-room system just to also “light up” the kitchen area with sound, I’ve kept a small (homebrew) 18+18W amplifier and Minimus 77 speakers on top of our fridge for years. It was linked to the living-room system via a stereo audio isolation transformer, and a Bluetooth receiver with an audio switch. Unsightly, but it worked well and sounded nice. With a recent remodeling of the kitchen and living-room areas, a better-looking solution was required. With a 12x12 soffit running in an “L” shape above all of the kitchen cabinets, in-wall speakers were the obvious choice. We ordered a set of Dayton Audio ME625W in-wall 2-way units and as I will get into later, eventually added a Dayton Audio DCS165 subwoofer and quasi-matching grille, all via Amazon. (The Pyle and FOSI amplifiers mentioned here were also Amazon purchases.) My first choice for a new small amp to power this was the Pyle PFA540BT unit with built-in FM radio and Bluetooth features. That unit was bought as an open box from Amazon. While plenty loud, it had a subtle but definite grating midrange distortion once warmed up that I did not notice until it was outside of the return window. My bad, these new parts all sat around while we finished the other renovations. We all agreed it was annoying, even my kids. Additionally, the switch-mode power supply for that amp was so noisy (RF-wise) that the radio receiver only would pull in one station, with a local antenna from only a couple of miles away. The rest of the band was utterly swamped out. (No FCC cert logo visible on the PSU, now we know why). My second amp was a FOSI audio unit, the BT30D, which is much better. No radio, but BT and line in. As a plus, it’s a 2.1 system with a dedicated drive channel for a passive sub. It’s rated at 50+50+100w. It’s plenty loud, however be aware it ships with a switching power supply that can deliver only about half of that wattage. (24v x 4A = 96W). Ah, marketing. With the amp issue sorted, I was still disappointed that the in-walls did not have bass that matched the small mini-77’s that we had listened to for 10 years. Given the larger drivers and volume of trapped air behind the in-walls, I was a little surprised. Research on the FOSI website was not able to tell me if the FOSI unit has a fixed High Pass Filter on the L-R outputs or not, so I was not sure if it was the speakers, or the amp limiting the bass. Everything below about 120Hz was absent. The Pyle amp, which has no amplified sub output, sounded similar in the bass, and a third full-range analog amp I connected in also played with little bass. Conclusion is that it’s the speakers or the install environment, most likely the speakers, as the two are separated by a lot of insulation, preventing any phase cancelling behind the wall. As a result, the stout little Dayton Audio 6-1/2" sub driver was ordered and installed with a ¾” split-baffle as support in the corner of the soffit for best loading. Once set up and adjusted, we now have a system with some decent extension into the 50-100 Hz range and more than enough volume to fill the kitchen area while providing a nice stereo listening field for most of the room. I wish we had the space for a larger sub driver, but with the framing behind the 12x12 soffit, an 8” or 10” just wasn’t going to fit. The 6-1/2” sub is respectable but it’s being driven rather hard to make up for it’s lack of piston area. A second identical unit is being considered, to double the cone area and increase the efficiency, but at least for the moment it sounds nice at reasonable levels. (EDIT: a second identical sub went in, same baffle approach, as close as I could get it to the first, which helped a lot - a little more cone area to grab air - and they are not being driven so hard. The system as of March 2023 is still going strong and used daily - DSB) On balance, the FOSI amp has been very good and well-behaved. It runs a little warm, but for its size it’s punching well above its weight and the BT implementation sounds quite good. It must have a decent SBC buffer scheme, as we don’t experience any buffer under-run drop-outs over long term listening with any of the apple, android or Chromebooks attached. Bluetooth range has also been solid throughout the area. This is probably due to the external no-compromise BT antenna. The amp is small enough not to notice on top of the fridge, and looks pretty smart. I’d buy it again. I will be posting this same review on the Sub and In-Wall speakers pages as well, because it's kind of a system-level review of all the bits and pieces. ### ⭐⭐⭐⭐⭐ Absolutely Outstanding—The Power and Control Make All the Difference! *by D***E on September 30, 2025* I’m running this Fosi Audio BT30D amp with JBL G50 bookshelf speakers, a Bose 100w passive subwoofer, and a Sony active subwoofer. The power this little unit puts out is honestly unbelievable—it drives all my speakers with ease and sounds fantastic across music and movies. One thing that really stands out is the independent sub volume and frequency controls. These let you dial in your bass exactly how you want it, which is essential when mixing subs and speakers. I spent a lot of time researching amps, and now that I have this one I can’t imagine owning anything else—especially since it pairs perfectly with my gear. If you’re hesitant because your speakers might be able to handle a bit more wattage, stop worrying! This amp handles them no problem, and gives way more control and clarity than anything I’ve tried before. Highly recommended—worth every penny! ### ⭐⭐⭐⭐ Great performance, price, clean, but cover your ears if you unplug the AC. *by C***E on June 17, 2025* We had a Polk powered subwoofer which after 6yrs the amp started buzzin n humming. It sat along with 2 Orb Spkers for as many yrs. So, this little amp at a good price point put new life into the subwoofer that we made into a passive Sub, with two Orbs, and you got a Nice 2.1 stereo with line in and Bluetooth is simple, Perf, sound system. potentiometers are very smooth, precise, power output clean, adequate in watts for small room or outdoor portable sound system, and we "off grid" powered it! It draws minimal AC, from the power brick, 24v. super efficient. However beware when the amp is switched off, no prob, But if you unplug the Pwr brick the Amp will "discharged" resulting in aloud "Pow! from the Sub. Dang shame! Otherwise a nice system. ## Frequently Bought Together - Fosi Audio BT30D Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Home Outdoor Passive Speakers/Subwoofer Powered Subwoofer - FosPower Banana Plugs 10 Pairs / 20 pcs, Closed Screw 24K Gold Plated Speaker Plug Connectors for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems - Kinter Cable 100ft 16-Gauge Audio Stereo Speaker Wire Cable, 100 Feet, 30.48 Meters, 2 Conductor, Polarity Marked, Flexible Clear PVC, CCA, Home Theater, HiFi, Surround or Auto Amps --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/90732501-bt30d](https://www.desertcart.pl/products/90732501-bt30d) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*