--- product_id: 728805918 title: "Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier" brand: "fosi audio" price: "€ 38.69" currency: EUR in_stock: false url: https://www.desertcart.fr/products/728805918-bluetooth-amplifier-power-amplifier-5-0-stereo-amplifier-audio-amplifier store_origin: FR region: France --- # Bluetooth 5.0 stable connection 50W max power output RCA & subwoofer support Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier **Brand:** fosi audio **Price:** € 38.69 **Availability:** ❌ Out of Stock ## Summary > 🎧 Elevate your audio game with power and precision! ## Quick Answers - **What is this?** Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier by fosi audio - **How much does it cost?** € 38.69 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/728805918-bluetooth-amplifier-power-amplifier-5-0-stereo-amplifier-audio-amplifier) ## 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 Mighty:** Sleek design fits effortlessly into any workspace or home setup. - • **Bass That Moves You:** Integrated subwoofer output for deep, controlled low frequencies. - • **Engineered for Endurance:** Optimized heat dissipation keeps performance steady during extended use. - • **Power that Packs a Punch:** Delivers crisp, room-filling 50W output for immersive sound. - • **Seamless Wireless Freedom:** Bluetooth 5.0 ensures stable, lag-free streaming from any device. ## Overview The Fosi Audio BT30D PRO Bluetooth Amplifier combines 50W stereo power with Bluetooth 5.0 connectivity, RCA inputs, and subwoofer support in a compact 680g chassis. Designed for audiophiles and professionals alike, it delivers stable wireless streaming and rich sound quality, making it a must-have for modern audio setups. ## Description desertcart.co.jp: Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier : Electronics ## Features - RCA - サブウーファー - Bluetooth内蔵 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09YNBHR73 | | Audio Output Mode | ステレオ | | Audio Output Type | bluetooth | | Brand | Fosi Audio | | Compatible Devices | Speaker | | Connectivity Technology | Bluetooth | | Connector Type | RCA | | Customer Reviews | 4.4 4.4 out of 5 stars (1,614) | | Item Weight | 680 g | | Model Number | BT30D PRO | | Number of Channels | 3 | | Other Special Features of the Product | Built-In Bluetooth, RCA, Subwoofer | | Output Wattage | 165 Watts | | Wattage | 165 W | ## Product Details - **Audio Output Mode:** ステレオ - **Brand:** Fosi Audio - **Compatible Devices:** Speaker - **Connectivity Technology:** Bluetooth - **Connector Type:** RCA - **Item Weight:** 680 g - **Number of Channels:** 3 - **Output Wattage:** 165 Watts - **Special Feature:** Built-In Bluetooth, RCA, Subwoofer - **Wattage:** 165 W ## Images ![Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier - Image 1](https://m.media-amazon.com/images/I/51ai7X4dnLL.jpg) ![Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier - Image 2](https://m.media-amazon.com/images/I/7121JXnKegL.jpg) ![Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier - Image 3](https://m.media-amazon.com/images/I/71YWJTYb2uL.jpg) ![Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier - Image 4](https://m.media-amazon.com/images/I/71pCjASiX7L.jpg) ![Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier - Image 5](https://m.media-amazon.com/images/I/61jiSpS-CcL.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.fr/products/728805918-bluetooth-amplifier-power-amplifier-5-0-stereo-amplifier-audio-amplifier](https://www.desertcart.fr/products/728805918-bluetooth-amplifier-power-amplifier-5-0-stereo-amplifier-audio-amplifier) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-05-30*