--- product_id: 382080504 title: "ZK-HT21" brand: "dajunguo" price: "E£ 6602" currency: EGP in_stock: true reviews_count: 8 category: "Dajunguo" url: https://www.desertcart.com.eg/products/382080504-zk-ht21 store_origin: EG region: Egypt --- # 300W total power output Wide 12-30V voltage input Independent treble & bass control ZK-HT21 **Brand:** dajunguo **Price:** E£ 6602 **Availability:** ✅ In Stock ## Summary > 🎵 Elevate your sound game — power, precision, and control in one sleek amp! ## Quick Answers - **What is this?** ZK-HT21 by dajunguo - **How much does it cost?** E£ 6602 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.eg](https://www.desertcart.com.eg/products/382080504-zk-ht21) ## Best For - dajunguo enthusiasts ## Why This Product - Trusted dajunguo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Advanced protection against short-circuit, over-current, and overheating keeps your system safe. - • **Always-On Support:** 24/7 customer service guarantees peace of mind with every purchase. - • **Seamless Connectivity:** Bluetooth, AUX, and USB inputs ensure effortless pairing with all your devices. - • **Powerhouse Performance:** Delivers a robust 100W×2 + 200W subwoofer output for immersive sound. - • **Tailored Audio Experience:** Fine-tune your sound with dedicated treble and bass controls for perfect layering. ## Overview The ZK-ST21 TPA3221 Bluetooth Power Amplifier Board is a compact yet powerful 2.1 channel audio module delivering up to 300W total output (100W×2 + 200W subwoofer). Compatible with 12-30V DC input, it supports Bluetooth, AUX, and USB inputs for versatile connectivity. Featuring independent treble and bass controls, it allows precise sound customization. Built-in multi-level protection ensures durability and safe operation, backed by responsive 24/7 customer support. ## Description Buy ZK-ST21 TPA3221 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 100W×2+200W, 12V-30V Audio Power Amplifier Module with Treble and Bass Control: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Excelente amplificador. - Excelente amplificador, buena calidad de sonido y potencia, recomendado. Review: Sounds Great - Easy to install sounds amazing. Connects easy without App, ## Features - 【TPA3221 HIFI CHIP】The TPA3221 Chip Solution: Stereo 2.1channel Output to Ensure Continuous Serial High-power Operation, Wide Voltage Input DC: 12-30V,This power amplifier board uses two TPA3221 high-fidelity maximum output power up to 100W*2+200W. - 【MULTIPLE INPUT METHOD】The ZK-ST21 has multiple input methods such as Bluetooth input, AUX input, and USB drive input. The vast majority of devices can be used, such as mobile phones, televisions, laptops, etc., making it easy to connect and use. - 【TREBLE & BASS CONTROL】If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of the power amplifier board, you can make the sound more layered and make the bass more shocking. - 【PROTECTION FUNCTION】ZK-ST21 Bluetooth power amplifier board has multiple protection mechanisms to ensure its safe operation. It has short-circuit protection, over-current, over-heat, and anti-reverse protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage - 【7 * 24 Hours After-sales Service】 Paying Attention To Customer Experience And Satisfying Customers Is Our Service Tenet. If You Have Any Questions About The Product, or The Product Has Quality Problems, Please Contact Us At Any Time, We Will Give You A 100% Satisfactory Answer ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CXX7TG5V | | Best Sellers Rank | #39,958 in Electronics ( See Top 100 in Electronics ) #212 in Audio Component Amplifiers | | Brand | DAJUNGUO | | Brand Name | DAJUNGUO | | Customer Reviews | 3.9 out of 5 stars 17 Reviews | | Included Components | amplifier board | | Item Dimensions | 4.76 x 3.93 x 0.98 inches | | Item Weight | 290 Grams | | Item dimensions L x W x H | 4.76 x 3.93 x 0.98 inches | | Manufacturer | DAJUNGUO | | Maximum Output Power | 300 watts | | Maximum Supply Voltage | 30 Volts (DC) | | Minimum Supply Voltage | 12 Volts (DC) | | Model | ZK-ST21 | | Mounting Type | Surface Mount | | Number of Channels | 2 | | Output Power | 200 Watts | | Part Number | ZK-HT21 | | Supply Current | 10 Amps | | UPC | 194852393783 | ## Product Details - **Item dimensions L x W x H:** 4.76 x 3.93 x 0.98 inches - **Manufacturer:** DAJUNGUO - **Maximum Supply Voltage:** 30 Volts (DC) - **Minimum Supply Voltage:** 12 Volts (DC) - **Mounting Type:** Surface Mount ## Images ![ZK-HT21 - Image 1](https://m.media-amazon.com/images/I/71xkffjoRML.jpg) ![ZK-HT21 - Image 2](https://m.media-amazon.com/images/I/81twokYdPzL.jpg) ![ZK-HT21 - Image 3](https://m.media-amazon.com/images/I/813+LAwwNAL.jpg) ![ZK-HT21 - Image 4](https://m.media-amazon.com/images/I/81P-woI7OmL.jpg) ![ZK-HT21 - Image 5](https://m.media-amazon.com/images/I/81KU8g427fL.jpg) ## Available Options This product comes in different **Model** options. ## Questions & Answers **Q: Is the subwoofer frequency knob an adjustable low-pass filter?** A: Yes frequency and gain aka volume separate from volume for everything..aswel as a slider volume so you can set the max anyone can turn the volume up..so they don't blow .. **Q: If I was hook this up in my vehicle with about 13.6vdc-14.1vdc and 50-60amps then will it work or blow? If it’ll work then how many watts/channel???** A: I had the slightly weaker version setup in my vehicle. I wired the front speakers to the two speaker channels, and ended up wiring my rear 6x9s in series and wired those to the subwoofer channel. You must be careful with impedances if you do this to make sure you don't blow your speakers. But doing this gave me very good sound for not having an actual subwoofer. A dedicated, high power amplifier will have way more bump for an actual subwoofer, however, if you're ok with the idea of using your rear fill as a stand-in subwoofer, wire it up how I described and it'll sound pretty good. I also used a DC-DC buck converter to step my vehicle's 12-14V DC up to the optimal power level for the amplifier. They're all over amazon just search the input power by the output power and the amp rating and you'll be good to go. **Q: Fuente recomendable para este equipo?** A: ¿Quieres decir qué tipo de energía necesita? La fuente de alimentación de 12V-36V / (5-15A) DC puede impulsarlo. Si desea obtener una entrada de alta potencia, primero debe aumentar el voltaje de entrada o reducir la impedancia del altavoz. **Q: To run a 4ohm sub and 4 ohm speakers what ah should I get for the 36v power supply?** A: This need depends on your needs, if your speaker power is relatively large, then it is recommended to use 36V. If the power of the speaker is not very large, the 24V DC power supply can also drive your speaker. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excelente amplificador. *by A***Z on October 19, 2025* Excelente amplificador, buena calidad de sonido y potencia, recomendado. ### ⭐⭐⭐⭐⭐ Sounds Great *by A***N on November 17, 2024* Easy to install sounds amazing. Connects easy without App, ### ⭐ Useless for 12V applications *by R***N on July 17, 2025* The good: It was easy to put together and wire up and seems to be well designed. Bluetooth pairing worked straight away with my iPhone. The not-so-good: I knew this wouldn't get the full 100 watts/channel at 12v, but I figured that an amp designed for 100w would deliver at least 20w when running on a 12V supply. There was nothing in the listing providing power numbers at various voltages. I guess this was my mistake- the amp includes a slip of paper showing output at various input voltages and speaker impedances, and with a 12V supply and 8 ohm speaker it puts out a whopping 10watts. Which is pretty useless even for the tiny speakers I was hooking this up to. ## Frequently Bought Together - TDA7498E Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control - ALITOVE 24V Power Supply DC 24 Volt 5A AC Adapter 100-240V AC/DC Adapter Transformer Compatible 5 Amp 4A 3A 2.7A 2.5A 2A with 5.5 * 2.5mm/2.1mm Tip for LED Strip CCTV Camera Printer LCD Monitor - Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control for DIY Bluetooth Audio and Store Home Theater --- ## 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.com.eg/products/382080504-zk-ht21](https://www.desertcart.com.eg/products/382080504-zk-ht21) --- *Product available on Desertcart Egypt* *Store origin: EG* *Last updated: 2026-07-26*