--- product_id: 629537133 title: "ZK-MT21 2.1 Channel Bluetooth Audio Power Amplifier Board 50W×2+100W with Treble and Bass Control for DIY Bluetooth Speaker Home Theater" brand: "hosyond" price: "₨652" currency: SCR in_stock: true reviews_count: 8 category: "Hosyond" url: https://www.desertcart.sc/products/629537133-zk-mt21-2-1-channel-bluetooth-audio-power-amplifier-board store_origin: SC region: Seychelles --- # Bluetooth 5.0, 49ft range 50W×2+100W output power Treble & bass adjustable ZK-MT21 2.1 Channel Bluetooth Audio Power Amplifier Board 50W×2+100W with Treble and Bass Control for DIY Bluetooth Speaker Home Theater **Brand:** hosyond **Price:** ₨652 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound game — power, precision, and wireless freedom in one sleek amp! ## Quick Answers - **What is this?** ZK-MT21 2.1 Channel Bluetooth Audio Power Amplifier Board 50W×2+100W with Treble and Bass Control for DIY Bluetooth Speaker Home Theater by hosyond - **How much does it cost?** ₨652 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/629537133-zk-mt21-2-1-channel-bluetooth-audio-power-amplifier-board) ## Best For - hosyond enthusiasts ## Why This Product - Trusted hosyond brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Sound Profile:** Fine-tune your audio with dedicated treble and bass controls to match your mood and space. - • **Powerful 2.1 Channel Output:** Experience immersive sound with 50W×2 satellite + 100W subwoofer power for dynamic home theater vibes. - • **Robust Protection Circuitry:** Built-in safeguards against short circuits, overcurrent, overheating, and reverse polarity keep your setup safe and reliable. - • **DIY-Ready & Easy Integration:** Copper DC connectors and barrier terminals ensure durable, heat-resistant wiring—perfect for custom speaker projects and home theaters. - • **Seamless Dual Input Connectivity:** Switch effortlessly between Bluetooth 5.0 wireless streaming and 3.5mm AUX for ultimate flexibility. ## Overview The ZK-MT21 is a versatile 2.1 channel Bluetooth audio amplifier delivering 50W×2 plus 100W subwoofer power with Bluetooth 5.0 and AUX inputs. It features adjustable treble and bass controls, advanced protection circuits, and durable copper connectors, making it ideal for DIY Bluetooth speakers and home theater systems. ## Description Buy ZK-MT21 2.1 Channel Bluetooth Audio Power Amplifier Board 50W×2+100W with Treble and Bass Control for DIY Bluetooth Speaker Home Theater: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: The one to buy - I'm more impressed with this one over the larger 36v $36 one of a different brand I was using that cooling fan crapped out. This one sounds better more dynamic and seems to have as much power at 24v also I had to unplug the 3.5mm jack to use the Bluetooth this one you can just link to it even while using the jack as input and it was half the price and no fan to crap out. I'm using for my tv I boxed in the stud cavity's in the wall under my tv and cut in a 6.5" component set and an 8" subwoofer, it's pretty sweet, I also used PVC pipe to install a port into the subwoofer cavity I had to replace the sheetrock with plywood and mud it in like drywall also the sheetrock couldn't support the pressure good even with a wood ring glued on. Review: Not bad for a cheap sound system. - I'm actually surprised that this works as well as it does. I hooked it up to the speakers in an old Samsung TV soundbar and subwoofer. I usually connect via Bluetooth from my laptop. It sounds much better than anything this cheap has a right to sound. Everything functions, the Bluetooth is reliable. I can't figure out if this is the amp, but I have to keep turning down the subwoofer, probably because the speaker I hooked it up to is cheap. Otherwise, it's loud and clear. ## Features - [Two Input Methods] It has two audio input methods: Bluetooth and 3.5mm AUX. Bluetooth 5.0 version, higher transmission efficiency, transmission distance up to 49 feet (no obstruction). - [Treble and Bass Adjustment] 2.1 channel, maximum output power 2X50W+100W. By adjusting the high and low frequency knobs, you can make the sound more layered and the bass more shocking. - [Protection Function] It has short circuit protection, overcurrent, overheating, and anti-reverse connection protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage. - [High Quality] Features copper DC connectors and barrier style terminals. It can withstand large currents without generating heat or damaging wires. Comes with a DC head lead, which is compatible with the input power interface of this product. Even if you don’t have a DC head adapter or battery, you can easily connect it. - [Application] Widely used in store solicitation, home theaters, DIY speakers, etc. If you have any questions about the product, or the product has quality problems, please feel free to contact us and we will give you a satisfactory answer. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CYLW7NRC | | Best Sellers Rank | #6,636 in Electronics ( See Top 100 in Electronics ) #24 in Audio Component Amplifiers | | Brand | Hosyond | | Brand Name | Hosyond | | Customer Reviews | 4.5 out of 5 stars 218 Reviews | | Included Components | 2.1 Bluetooth Amplifier board | | Manufacturer | Hosyond | | Material Type | Plastic | | Maximum Output Power | 50W×2+100W | | Maximum Supply Voltage | 24 Volts (DC) | | Minimum Supply Voltage | 12 Volts (DC) | | Model | MT21 | | Mounting Type | Surface Mount | | Number of Channels | 2 | | Output Power | 50 Watts | | Package Type Name | Box or Clamshell | | Part Number | MT21 | | Specification Met | CE | | Supply Current | 5 Amps | | UPC | 768572762640 | | Voltage | 12 Volts (DC) | | Warranty Description | NO | ## Product Details - **Manufacturer:** Hosyond - **Maximum Supply Voltage:** 24 Volts (DC) - **Minimum Supply Voltage:** 12 Volts (DC) - **Mounting Type:** Surface Mount - **Voltage:** 12 Volts (DC) ## Images ![ZK-MT21 2.1 Channel Bluetooth Audio Power Amplifier Board 50W×2+100W with Treble and Bass Control for DIY Bluetooth Speaker Home Theater - Image 1](https://m.media-amazon.com/images/I/61hFCgUy5YL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ The one to buy *by A***Z on November 1, 2025* I'm more impressed with this one over the larger 36v $36 one of a different brand I was using that cooling fan crapped out. This one sounds better more dynamic and seems to have as much power at 24v also I had to unplug the 3.5mm jack to use the Bluetooth this one you can just link to it even while using the jack as input and it was half the price and no fan to crap out. I'm using for my tv I boxed in the stud cavity's in the wall under my tv and cut in a 6.5" component set and an 8" subwoofer, it's pretty sweet, I also used PVC pipe to install a port into the subwoofer cavity I had to replace the sheetrock with plywood and mud it in like drywall also the sheetrock couldn't support the pressure good even with a wood ring glued on. ### ⭐⭐⭐⭐⭐ Not bad for a cheap sound system. *by R***R on January 7, 2026* I'm actually surprised that this works as well as it does. I hooked it up to the speakers in an old Samsung TV soundbar and subwoofer. I usually connect via Bluetooth from my laptop. It sounds much better than anything this cheap has a right to sound. Everything functions, the Bluetooth is reliable. I can't figure out if this is the amp, but I have to keep turning down the subwoofer, probably because the speaker I hooked it up to is cheap. Otherwise, it's loud and clear. ### ⭐⭐⭐⭐⭐ Exceeded expectations *by A***R on September 29, 2025* I have a couple of these. Bluetooth sounds better than using the cord. Use an appropriately powerful DC laptop brick or anything similar if you want the biggest sound. The one connected to my PC uses a 200w 20v DC brick to drive 4 speakers (2L and 2R in parallel) plus 2x 12in subs (also in parallel). It will shake things off the walls in my house. You won't believe the performance from such a cheap device. Pros: Easy to assemble, wire, and connect power. Bluetooth setup is simple. With the right power and speakers/sub, your neighbors will think there's an earthquake. Cons: Slight hiss if you leave the main volume knob turned up to max with nothing playing. If you're listening to something with pauses at low volume, it may not play the next spoken syllable or noise. This does not happen at medium volume or if the movie you are watching has birds chirping etc in the background. It's almost as if it goes to sleep for a fraction of a second. ## Frequently Bought Together - Hosyond 2.1 Channel Bluetooth Audio Power Amplifier Board 50W×2+100W with Treble and Bass Control for DIY Bluetooth Speaker Home Theater - APIELE 16mm Latching Push Button Switch 12V DC On Off Black Shell with LED Angel Eye Head for 0.63" Mounting Hole with Wire Socket Plug Self-Locking (Blue/Black Shell) - Kzreect for Power Wheel Adapter Compatible with Milwaukee 18V Battery, Converter Kit with Fuse Holder, Switch, Terminal, 12AWG Wire for DIY RC Car Toys (1 Pack) --- ## 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.sc/products/629537133-zk-mt21-2-1-channel-bluetooth-audio-power-amplifier-board](https://www.desertcart.sc/products/629537133-zk-mt21-2-1-channel-bluetooth-audio-power-amplifier-board) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-06-22*