--- 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" price: "R4205" currency: ZAR in_stock: true url: https://www.desertcart.co.za/products/449234251-bluetooth-subwoofer-amplifier-2-1-bt30d-pro-subwoofer-amp-tpa3255 store_origin: ZA region: South Africa --- # Bluetooth 5.0 with 15m stable range 165W x2 + 350W subwoofer power 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 **Price:** R4205 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound game—big bass, sleek design, 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 - **How much does it cost?** R4205 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/449234251-bluetooth-subwoofer-amplifier-2-1-bt30d-pro-subwoofer-amp-tpa3255) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Yet Durable:** Sleek all-metal chassis combines premium build quality with a minimal footprint for any desktop or bookshelf. - • **Plug & Play Simplicity:** Effortless setup with multiple passive speaker outputs—transform your space into a high-fidelity audio haven. - • **Powerhouse Performance:** Unleash 680W total output with dual TPA3255 chips for crystal-clear, distortion-free sound. - • **Tailored Bass Experience:** Fine-tune your subwoofer frequency (0-300Hz) and volume for immersive, room-perfect bass vibes. - • **Seamless Wireless Freedom:** Bluetooth 5.0 ensures stable, lag-free streaming up to 15 meters—perfect for indoor or outdoor setups. ## Overview The Fosi Audio BT30D Pro is a compact 2.1 channel subwoofer amplifier delivering a powerful 165W x2 plus 350W subwoofer output via advanced TPA3255 Class-D chips. Featuring Bluetooth 5.0 for stable wireless streaming up to 15 meters, precise bass and treble controls, and a durable all-metal build, it’s engineered for desktop, bookshelf, or outdoor speaker setups. Perfect for audiophiles seeking premium sound clarity and customizable bass in a sleek, space-saving design. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09YNBHR73 | | Best Sellers Rank | #5,250 in Electronics ( See Top 100 in Electronics ) #16 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 | | Customer Reviews | 4.5 out of 5 stars 1,777 Reviews | | Item Type Name | Bluetooth Amplifier | | Item Weight | 1.5 Pounds | | Manufacturer | Fosi Audio | | Mfr Part Number | BT30D Pro | | Model Number | BT30D PRO | | Unit Count | 1.0 Count | | Warranty Description | 24 Month Manufacturer | ## 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. ## 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 --- ## 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.co.za/products/449234251-bluetooth-subwoofer-amplifier-2-1-bt30d-pro-subwoofer-amp-tpa3255](https://www.desertcart.co.za/products/449234251-bluetooth-subwoofer-amplifier-2-1-bt30d-pro-subwoofer-amp-tpa3255) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-06-06*