100W+100W Amplifier Board with Treble and Bass Control, DC 9-24V, BT and AUX Inputs, 2.0 Channel Stereo AMP Board for DIY Wireless Speakers, Password Free (DAJUNGUO ZK-1002T)

Used this with an old broken Bose sound bar system that I retrofitted. The amp in the sound bar died. I wired the board into the enclosure and now I use the sound bar as a high quality bluetooth speaker. The bose system had 4 speakers, 2R and 2L. I was able to wire each of the 2 sides in parallel after checking the impedance and it is working great. The bluetooth connection works great, the sound output is loud and clear and it was easy to find an old DC power adapter that worked between 9-24V with at least 5 amps. I chose to use an old 24V (90W) adapter from a broken laptop to give me the most power since the Watt output is directly related to the Volts of the power adapter. I embedded an inline power switch and routed it to the front of the speaker so it is easy to turn the system on and off without reaching around to the knobs. The speaker looks great and sounds better. I love finding a new use for old equipment. The board was easy to wire, has plenty of connection options and the knobs make it easy to adjust the bass, treble, and volume. It wasn't too expensive for a 200W amp. This board works great for these types of projects.

It sounds great, plenty of power for my two 35 watt ms 4” speakers. Very discreet “bing” sound when the Bluetooth connects to my phone. Easy to assemble and install. Doesn’t get hot. Audio pauses when I get a phone call (call doesn’t go through the amp). Solid and stable Bluetooth connection. Perfect “hidden” stereo for classic car - I left the original, broken, AM radio in the dash for looks, and replaced the single 4”x10” mono center-dash speaker with two Infinity 4” Reference speakers rated for 35 watts RMS (105 max) 4 ohm each. This receiver has more power than I need, so I have it’s volume set at 60-75% of max. I get a small but sufficient amount of base (pleasantly surprised), and nice mids and highs. I like being able to adjust base and treble. No hiss or noise. It’s loving the 13 volts my car delivers. I’m very impressed with this little receiver. No complaints, and almost free. The downside to this setup is that I need to touch my phone to adjust volume, skip songs, use Siri, etc. Also, an incoming call will pause the Bluetooth, but not route the call audio through the car speakers, and there’s no microphone,so no hands-free calling. My solution was to also buy “Aston Innovations SoundTek A1+ Bluetooth Car Kit”, and plug it into the AUX input of this little amp. Then I use the Bluetooth of the SoundTek instead of the Bluetooth on the amp, and I have everything I want: 1) Original looking (but not working) 1966 AM radio in the dash 2) Streaming music through Pandora or Spotify 3) Hands-free calling where I can hear and be heard, and use Siri No AM/FM, but who cares. The SoundTek has a 1.6” round control pad that I can hide in the ashtray or wherever. Through it I can control everything by feel, without needing to look an or touch my phone: volume, next song, previous song, pause, make a call answer/reject a call, or use Siri (voice commands). This amp, plus the hands-free SoundTek kit, sound great, and cost very little.

Works well and sounds great for the size! Definitely well worth the price and you get a lot out of it, it’s nice to have the different controls too. Very handy and functional!

Sounds great and the Bluetooth connects right away. Easy to hook up. I had some car speakers laying around and they work great these, i paired it with a 12v dc battery pack and this thing rocks. I used some stiff cardboard to make a temporary boom box and it holds up well. Since its so small it is pretty light too so you might have to tape it down. The bass and treble work really good as well. Do note to use the aux in the back the Bluetooth has to be turned off from your phone or else it work. Thats why i docked a star from it. Overall it works well for how small it is. And is pretty damn loud with the right speakers.

The sound is fantastic. I have been looking for a blue tooth unit so I can have music from my old speakers again. I hooked it up and when it came to life, I was amazed at the sound, that I have been missing for some time. I powered it up with my Ryobi power converter, and it worked Great!

So I wanted to build myself a little portable bluetooth system that I could slap one of my 24v kobalt batteries on. At 24v let me tell you this thing pumps, and the audio quality is actually impressive. I have it hooked up to two 4ohm rockford fosgate 6x9 speakers and the bass rattles, the treble is crisp and clear, and the bluetooth functionality works perfectly with decent range. I've run it for 3 hours straight with only one bar lost from my 4.0AH battery. Doesn't even get very hot. Overall, i'd buy this product many times over. Edit: So, 4 years have passed, and this little guy has finally started giving me trouble. First with the aux output mode giving out, and then the bluetooth mode. Honestly, for 26 bucks I'm impressed it lasted this long. i've been using this exclusively to power my PC audio for several months, and let me tell you it has enough power to rattle the windows with the right speakers. What are you waiting for? Stop reading this and buy it already. I'm ordering another one right now.

I bought two of these and had some issues with one that I couldn't figure out. I contacted their support and they asked for the details of the problem. I sent them and they immediately shipped me a new unit! I wasn't entirely sure it was even the amp that was bad, there turned out to be a problem with the source (defective audio cable). Amazing value, easy to connect.

Perfect for hookking up to random speakers

Tiene buen sonido estéreo, la calidad de sonido es buena, me gustaría que su carcasa fuera totalmente cerrada y que incluyera un control de balance, funciona muy bien.

Compact et efficace, brancher sur des enceintes Cabasse, résultat très sympa. attention il n'est pas livré avec le câble d'alimentation.

Amplifier quality is very good, if it clubbed with 24V adapter it will give amazing output. Go for it audiophiles

Non mi sarei mai aspettato una simile potenza, alimenta un impianto bose (anni 90) senza problemi ed il suono tramite bluetooth è spettacolare, acquisto consigliatissimo

Funciona muy bien, lo utilicé en 2 bafles de un minicomponente y entre mas se alza el voltaje con alrededor de 5 amperes, mas potencia da.