--- product_id: 473461440 title: "4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]" brand: "douk audio" price: "₩519797" currency: KRW in_stock: true category: "Douk Audio" url: https://www.desertcart.kr/products/473461440-4-channel-bluetooth-amplifier-50w-x-4-audio-power-amp store_origin: KR region: South Korea --- # Supports MP3, FLAC, WAV, APE lossless 50W x 4 max output power Bluetooth 5.0 + wired RCA inputs 4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4] **Brand:** douk audio **Price:** ₩519797 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your soundscape—4 channels, endless possibilities! ## Quick Answers - **What is this?** 4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4] by douk audio - **How much does it cost?** ₩519797 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/473461440-4-channel-bluetooth-amplifier-50w-x-4-audio-power-amp) ## Best For - douk audio enthusiasts ## Why This Product - Trusted douk audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Hi-Fi Sound Clarity:** Engineered with premium components and separate signal circuits for crystal-clear, distortion-free audio. - • **Sleek & Durable Design:** CNC-machined aluminum alloy chassis with anodized finish—stylish enough for your office or home desktop. - • **Versatile Connectivity:** Seamlessly switch between Bluetooth 5.0 wireless, dual stereo RCA inputs, and U-disk playback for ultimate flexibility. - • **Powerful 4-Channel Output:** Deliver immersive sound with 50W per channel, perfect for multi-room or multi-speaker setups. - • **Independent Volume Control:** Fine-tune each speaker’s volume individually to create the perfect audio balance in any space. ## Overview The Douk Audio M4 is a compact 4-channel Bluetooth amplifier delivering 50W per channel with versatile inputs including Bluetooth 5.0, dual stereo RCA, and U-disk support for multiple lossless audio formats. It features independent volume controls for each channel, a high SNR of ≥98dB, and a durable CNC-machined aluminum case, making it ideal for multi-room audio setups, home offices, or desktop Hi-Fi systems. ## Description One group of stereo RCA (CH3 and CH4) can be used as audio input or output by switching the selector, to acheive different demands: CH3/CH4 as audio output: 4 groups of speaker sockets can connect to 2 pair of speakers. Besides connect to active speakers, CH3/CH4 also can connect to another M4 amplifier to connect more speakers, in this way multiple amplifiers and multiple speakers can be connected in turn, to achieve one audio signal be shared in several rooms.CH3/CH4 as audio input: one input corresponds to one output (ex. CH1 speaker socket will output the audio signal that CH1 inputs), which means that two groups of stereo audio signal (or 4 groups of mono audio signal) can be input at the same time. Notice: U-disk input is prior to Bluetooth input, so please make sure U-disk has been pulled out if you want Bluetooth input. Parameters: Model: Douk Audio M4Channel: 2.0 / 4.0Audio input: Bluetooth/Stereo RCA/U-diskAudio output: speaker socketsU-disk support format: MP3, WMA, APE, FLAC, WAV...U-disk capacity: max 32GBluetooth version: 5.0Speaker impedance: 4-8ΩMax output power: 50W*4 (4Ω load)SNR: ≥98dBInput sensitivity: 0.775VTHD: 0.05%(1kHz 1W)Frequency Response: 20Hz-20KHz(±3dB)Working voltage: DC 12-24VColor: BlackDimensions(W*D*H): 128*134*33mm / 5.04*5.28*1.30inNet weight: 540g / 1.19lbPackage weight: 1100g / 2.43lb Packing List: 1*M4 Amplifier1*24V/4.5A Power Supply1 Set*Raw Cable Speaker Jacks1*Manual ## Features - One group of stereo RCA (CH3 and CH4) can be used as audio input or output by switching the selector, to acheive different demands - Supporting wired 2 groups of stereo RCA and wireless Bluetooth 5.0 input, compatible with most common audio device such as phones, computers, TVs, MP3, TV, CD players etc. With U-disk input, it can be used as a digital music player, supporting MP3, WAV, APE, FLAC and WMA lossless formats. - With 4 groups of speaker sockets output, they can output at the same time and each channel with independent volume control. Its max output power can reach 50W×4, and equipped with high-quality 24V/4.5A power supply, enough to drive most home speakers. - Reasonable circuit layout, concise wiring and high-quality components to ensure HiFi clear sound and long time stable work. Separate design of small and large signal circuit for better circuit protection. Unique Bluetooth design without any external antenna, very practical and beautiful. - Propersize with exquisite appearance, aluminum alloy case is CNC machined and with anodizing process, more fashionable and durable, very suitable for home, office and desktop audio system use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0875WY9TX | | Brand Name | Douk Audio | | Customer Reviews | 4.2 4.2 out of 5 stars (344) | | Manufacturer | Douk Audio | | Manufacturer Part Number | SUC-M4 | | Model Number | SUC-M4 | ## Product Details - **Voltage:** 24 Volts (DC) - **Manufacturer:** Douk Audio - **Maximum supply voltage:** 24 Volts - **Minimum supply voltage:** 12 Volts - **Mounting type:** Surface Mount ## Images ![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4] - Image 1](https://m.media-amazon.com/images/I/618e5MV9XwL.jpg) ## Questions & Answers **Q: When using Bluetooth as the input, will the audio be output to all 4 channels simultaneously?** A: Yes. in its simplest setup, there is basically Stereo, Left and Right audio channels, times two If you want it to work that way. OR, if you want/need to something more complex, you can change the mode of operation by pressing a button in the back, and have 2 separate Stereo feeds. One Stereo feed for channel 1 and 2, and a different Stereo feed for channel 3 and 4 by using the RCA jacks on the back. Its pretty well explained in the manual, and in the details of the Item Description if you cared to read it. **Q: At low volume levels my unit cuts in and out, with an accompanying soft hum/beep. Before I ask for a replacement, ahs anyone else experienced this?** A: Hello. Could you please send us a message on Amazon with more details? This issue may happen if the speaker power is too high. **Q: Does this have sufficient power to power 4 Aura ast-2b-04 shakers?** A: I have 35 watt ceiling speakers and the volume is very sufficient. You could always try it or send it back if it didn't work. Great amp for the price and very small footprint. **Q: Is there a way to hook up a master volume switch to this unit, any ideas???** A: Hello. You can add a volume control before this device. For example, https://www.amazon.com/dp/B07GRLV7XG?ref=myi_title_dp ## Frequently Bought Together - 4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4] - Amazon Basics 16-Gauge Speaker Wire Cable, 100 feet, Bronze - Dayton Audio BST-1 High Power Pro Tactile Bass Shaker 50 Watts RMS, 4 Ohms Impedance - Turn Any Surface into a Speaker System - Generates Subwoofer Lows --- ## 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.kr/products/473461440-4-channel-bluetooth-amplifier-50w-x-4-audio-power-amp](https://www.desertcart.kr/products/473461440-4-channel-bluetooth-amplifier-50w-x-4-audio-power-amp) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-10-15*