MakerHawk copper Bluetooth Amplifier Board Hifi Stereo 2.1 Tpa3116D2 2X50W+100W 12V-24V Audio Power Amplifier Module Bass And Treble Control For Store Home Theater Speakers

Using the ZK-TB21 in a 2.1 setup with my Fire TV Stick 4K Max (1st Gen) over Bluetooth 5.0. It drives two Sony SS-TSB108 3-ohm left and right speakers and a Sony 4-ohm subwoofer, powered by a 24 V 10 A DC supply. The sound is genuinely impressive. Clean left-right separation, clear dialogue and deep, controlled bass after properly adjusting the crossover and subwoofer level. No AV receiver or external processor. For such a compact Class D amplifier board, the performance is remarkable.

Very Good Product and easy to install. Does the work very well. Sound quality is as well very good. Highly recommended..Bluetooth adds 5 star...Aux also works very well. Overall value for money product. It is very small in size so fits anywhere. Sound quality is also good and can produce very powerful sound. cheers

Very nice sound quality.. Good product. You can buy it without any doubt

I was skeptical about the quality of this product when I ordered, but now I am very happy that it was right decision I made. It works beautifully, with all that bass, treble and subwoofer controls and with lots of power to the speakers. Can’t expect anything more. I am using it on my old JBL 3 way speakers replaced by all Dayton drivers.

I received the product with no screw on the terminal and also no screw to tighten the top an bottom cover.. Another big issue was,the subwoofer terminal doesn't work..

Don't waste money

I bought this ZK-TB21 2.1 channel amplifier module to build a custom audio setup combining my Audio Arrays studio monitors and a 8" 150W subwoofer, and I must say — this little board exceeded expectations! 🔧 Power & Setup I powered it using a standard PC PSU (12V rail) via a DC barrel jack with a terminal block adapter. Just make sure to connect the yellow 12V and black GND wires properly — it worked like a charm once powered on! 🎛️ Subwoofer Integration The Subwoofer Frequency knob is a real game-changer. I set it around 70–80 Hz to let the sub handle only the deep bass, while my studio monitors take care of mids and highs. This avoided the common issue of muddy or boomy bass — the sound is now clean and well-balanced. 🎚️ Fine Tuning Options It has separate knobs for Sub Volume, Treble, Bass, and Main Volume, which gave me full control over my sound. I kept treble and bass flat since my studio monitors already offer accurate output. 🔗 Connection Simplicity I used an AUX splitter to feed the same signal to the amp and my monitors. It’s a very easy and effective setup for casual listening or even light production work. No signal loss or distortion noticed. ✅ Pros: Compact but powerful — easily runs a sub and full-range speakers Great tuning flexibility with separate controls Affordable way to build a Bluetooth, AUX & USB -ready 2.1 audio system Perfect for studio monitor + subwoofer setups ⚠️ Things to Know: Requires a 12V–24V power source with enough amperage (I used a PC PSU)

Great amplifier. Works well with 14 volt adapter also. Sound on bluetooth is not so good. But overall a great product. Update: I have a Panasonic SA-AK122 Music player. I connected speakers of this Panasonic music system to ZK-TB21 amplifier. It sounds great with this little amplifier. Even more clear than Panasonic system.

I made my own battery box for my boat trolling motor and install two marine speakers. I was surprised how much volume and base that I got out of this very small item. Very happy with it and glad that I purchased it. All tools required to install are included and the quality is very good.

So far, I like this little amp. It came packaged well: small box with a disassembled unit that you put together. I'm a tinkerer, so that's perfect! It was easy to assemble. Took less than 5 minutes. It has a 3.5mm stereo jack or blue tooth for pairing to a phone. I tried both and they worked well. Sound quality is good, albeit I don't have my speakers mounted in a box yet, so I'm hoping for a marked improvement. All in all, I'm happy. If you're expecting high end perfect performance, you probably want to go with something more costly. If you're building a simple stereo project for the fun of it, try this out. It's cheap, small, and fun CON: didn't come with a power supply. I received some advice from others and ended up powering it up with an old 12v 3.5A adapter from my old Netgear router. It worked! I'll get a better 12V or 24V 10A supply later.

Currently using with a 12V, 40A, 100% duty cycle power supply to drive some 6 ohm bookshelf speakers. If the specs are to be believed, this little board is supposed to be able to pump out 12W per channel at 12V with 8 ohm speakers so, my best estimate is that it should be able to provide about 15W per channel in my configuration. To be honest, I'm not sure I'm getting that kind of volume but, other than that, this thing is great. Sound fidelity is amazing for what this is. The BT connection tone is pleasant and not overly loud. Connectivity is good and I absolutely love the analog style volume control with off switch. The noise to signal ratio is really good (no hissing or popping).

Muito bom aparelho sistema bluetooth excelente!!! Recomendo

Esta compra me super agrado, nunca imagine que este super pequeño amplificador alimentaria mis bocinas Micca y las llevaria a un muy alto volumen. Es fantastica, solo asegura alimentar adecuadamente y el equipo te sorprendera.