TWS Bluetooth Mono Amplifier Module 100W DC 7-24V with TPA3116D2 Chip, Wireless Stereo Pairing, Multi-Input USB AUX Bluetooth, Volume Knob Control for Christmas DIY Car & Home Audio

Could be in a more esthetic looking box but that's only because its in our living room other than that this little thing puts out loud, clear sound. I have it pushing just one 8" skar marine speaker and that thing screams. The bt is easy and quick to pair with a good range, I can go from where it is into the master bedroom, close the door, and into the bathroom, and close that door going through 2-3 walls and the washer and dryer and still be connected. Great clarity, no distortion, PLENTY of power. Highly recommend for a budget Bluetooth speaker build.

Very good Class D Amplifier for this price This is class D amplifier (sometimes it is called “digital” amplifier. The advantage of class D is very high efficiency >90%. The disadvantage is higher distortions, but in most applications, it wouldn’t matter, and people wouldn’t hear it. I powered the amplifier from the bench Power Supply and tested it at different voltages, measuring the input power (Pin, W) and the output power (Pout, W) at 4 Ohm load, using sinewave generator at my phone over Bluetooth, as the input signal. Two Oscilloscope channels were connected to two output terminals (this is a “bridge” amplifier and load is connected between two active outputs). The output peak-to-peak voltage (Vp-p) was measured. The output power was calculated Pout = ((Vp-p) * 0.7)^2 / 4. Volume was adjusted to provide maximum output amplitude without clipping. Results (1kHz, 4 Ohm): Vin = 12V, Iin = 1.3A, Pin = 15.6W, Pout = (11.0*0.7)^2 / 4 = 14.8W, Efficiency = Pout / Pin * 100% = 95% Vin = 16V, Iin = 1.6A, Pin = 25.6W, Pout = (14.0*0.7)^2 / 4 = 24W , Eff = 94% Vin = 20V, Iin = 1.95A, Pin = 39W, Pout = (17.0*0.7)^2 / 4 = 35.4W, Eff = 91% Vin = 24V, Iin = 2.25A, Pin = 54W, Pout = (19.8*0.7)^2 / 4 = 48W, Eff = 89% • Note: The Amplifier output was shutting down after 10 seconds and coming back in a few seconds as a result of over-temperature protection., because the Test was conducted with the continues sinewave and the amplifier is not designed for this condition. Normal audio signal has significantly lower average power. Result (1kHz, 3 Ohm): Vin = 24V, Iin = 2.98A, Pin = 71.5W, Pout = (19.6*0.7)^2 / 3 = 62.7W, Eff = 88% • Note: Over-temperature protection was shutting down the output after 1 second and coming back in a few seconds. • Frequency Response: 20Hz – 18kHz • Note: My Generator lowest frequency is 20Hz and I couldn’t test it below. • There is no output signal above 18kHz. What I like: Small size Quality Efficiency BT and analog input What can be improved: The heatsink is attached with double-sided tape, which is not very secure and doesn’t provide good heat transfer. Conclusion: Very good class D amplifier for the money

Great little amp for a DIY bluetooth speaker. Pretty simple assembly, and mounting. My only ding is that its rated for 100W, if you go with a 150-160W speaker at full volume you'll get a little distortion. Might need to go with a 200W instead.

These amplifiers earn a solid 5 stars. I have used these for prototyping panel speakers, as well as run my home theater! I use two of these paired together to connect from my TV via Bluetooth. I power them with 24v, and they sound great! I have them also feeding high level inputs into my powered subwoofer and it works great! I just leave them on 24/7, and as a bonus any time I want to hear music, anyone can connect their phone to "Wuzhi". Some tips: 1) Wuzhi shows up as two different bluetooth devices, a speaker and headphones, I use the headphone broadcast! 2) I had to update my TV Firmware to connect. 3) I originally powered these with a battery pack, as voltage dropped, the amps would cut out... so use a good 12-24v power supply!

I used old laptop chargers for the right voltage and amperage. It has built-in flexibility for watts and amps, thank goodness. I bought a couple and paired them easily. My project was just connecting these to home McIntosh ML-1C speakers. Surprisingly awesome, and I didn't have to buy an equalizer. I just used the equalizer on my phone and it works perfectly.

Endless loop of beeps trying to connect and fail to connect. Still using as they are simple amps and sound great, they do the job if you do not care about linking two together

This was a greatLittle powerhouse for my vintage radio project. Worked beyond my expectations, I love the usb drive function.

It’s velcroed to, and using only 12v 3A power supply. Other reviews on wattage was near perfect for my 20 watt driver in a cup for hanging out and tailgating. Only needs 96 watts, so I can use my small Ryobi 150 watt inverter. Added a tiny blower fan 12V 0.1A aimed at the heat sink. I scraped off a square center of heat sink adhesive and placed a drop of thermal paste. Also, turned it all the way up and pulled out knob as it’s not needed. Bluetooth is automatic when powered up and just use volume on my phone, at 100% volumes on both amp and phone, no distortion heard; I did place dampening stick on pieces inside the cup. Very happy and is very loud, make the cup dance around a bit if not in a cup holder.