Store New Arrivals Add to Favorite View Feedback Contact Bluetooth Amplifier Board 2.1 2X50W+100W 12V-24V Audio Power Amplifier Module B Description Item model number ZK-MT21 Mounting Type Surface Mount Maximum Supply Voltage 24 Volts (DC) Minimum Supply Voltage 12 Volts (DC) Voltage 24 Volts Package Dimensions 5.24 x 4.41 x 2.09 inches; 4.59 ounces [2-in-1] High quality power amplifier board. With AUX and Blue tooth two audio input methods, 2-in-1. 5.0 Bluetooth version, the transmission efficiency is higher, the transmission distance is farther [High Performance] Blue tooth audio amplifier module 2.1 channel, Max output power 2X50W+100W. With antenna and antenna base, the signal is better, the efficiency is high, and the anti-interference ability is strong [Protection Mechanism] With short-circuit protection as well as overcurrent, overheating, and anti reverse connection protection to prevent total failure. In the event of an overload, the device reports the fault condition to the processor to protect itself from damage [High Quality] It adopts copper DC connector and fence type terminal. It can withstand large current, no heat, no damage to the wire. Free DC head lead, compatible with the input power interface of this product, even if you don't have a DC head adapter or battery, it can be easily wired [Application] With bass, treble, subwoofer frequency and volume control, easy to adjust volume, enjoy the music tone what you want. Widely used in store solicitation, home theater, square speakers, etc Product Description Parameter Model: ZK-MT21 Blue tooth Version: 5.0 (without occlusion 15m) Audio Input: AUX + Bluetooth Channel: 2.1 Input sensitivity: 500mV Adaption Supply Voltage: 12-24V / 5A above (Do not connect to 24V battery pack) Speaker: 20-100W, 4-8Ohm Output Power: max 50W @R L channel; max 100W @subwoofer Protection Mechanism: anti reverse connection, overheating, overcurrent, short circuit protection Tip: To have enough output power if the audio input is sufficient and the supply voltage/current is sufficient. The power supply voltage is higher and the relative power will be larger. The speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the ohms of the horn, the smaller the relative sound power. Please ensure that the power of the adaptor is greater than the actual working power of the amplifier. What you get: 1 * Amplifier board blue tooth 5.0 1 * Shell (upper+lower) 1 * Antenna+base 1 * Accessories as shown MakerHawk Bluetooth Amplifier Board Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.4 out of 5 stars 382 4.0 out of 5 stars 269 4.4 out of 5 stars 382 4.1 out of 5 stars 81 4.3 out of 5 stars 292 4.4 out of 5 stars 130 ? Price $13.99$13.99 $23.99$23.99 $16.99$16.99 $46.99$46.99 $24.99$24.99 $15.99$15.99 ? Model 502L MT21 ZK-1002L AS21 TB21 502H M19 Features Ordinary chip, standard sound Ordinary chip, standard sound Ordinary chip, HQ sound TPA3255 chip, HQ sound HiFi Stereo 2.1 TPA3116D2 TPA3116D2 chip, HQ sound TPA3116D2 dual chip Audio input Bluetooth AUX+Bluetooth Bluetooth AUX+Bluetooth+U disk+USB card AUX+Bluetooth AUX+Bluetooth+U disk+USB card Bluetooth+RCA+Coaxial+Optical Output Power 50W*2 L R ?50W,subwoofer ?100W 100W*2 L R ?220W,subwoofer ?350W 50W*2+100W 50W*2 100W*2 Heat Sink Heat Sink 36*25*10mm Large Heat Sink 55*55*10mm 50*25*10mm 20*18*10mm YES Adapted power supply DC5~24V DC 12~24V, 5A DC5~24V DC 16~38V, 10A DC 12~24V, 5A DC9~24V DC12~24V Adapted speakers 30-200W;4-8? 20-100W;4-8? 50-300W;4-8? L R: 30-220W,3-8?, S:30-350,2-8 20-100W;4-8? 10-100W;4-8? 4-8? Protection mechanism YES YES YES YES YES YES YES Size 55*38*17mm 93*90*22mm 69*53*22mm 141*131*27mm 120*100*20mm 60x60x29mm 119*111.8*41.6mm Weight 52g 185g 124g 408g 256g 104g 297.9g ABOUT US We offer the best prices around on high quality products. Our E-store includes media such as books, movies, music and games while offering electronics, toys, sporting apparel, clothing, tools, general home, garden items and more. SHIPPING We are always working hard to ensure your package arrives as soon as possible. Please understand that some factors like weather, high postal traffic, and the performance of shipping companies are outside of our control. RETURNS We offer a 30-Day Return Policy on items which you are not completely satisfied with. You have the option for a full-refund or an exchange of the item. PAYMENT We accept PayPal. CONTACT US This page content is yet to come Please ad us to your favorite seller and visit again later Thank You CUSTOMER SATISFACTION We try our very best to make sure every customer is completely satisfied. If there's a problem, message us! We're happy to help.