DAMGOO Bluetooth Amplifier Board,50w+50w 2 Channel Audio Amplifier Board Suitable for retrofit Speakers Bluetooth Speakers,Easy Installation and Password Free Connect to Phone with Protective Shell

This little board is bad ask.lol. Worth every penny ..the power requirements are versatile...5-24vdc. I have powered it up all day with a 20 cordless tool battery. It has yet to use full charge in an 8 hour day.It runs two 8" And two 3" speakers in a four foot custom box and the sound is incredible..I was very surprised at the clarity and range ..excellent bass excellent mids... excellent highs. I have intentions of setting up another board with a amp board and crossovers to drive a couple 12" and horns for an old fender system the Bluetooth has a decent range at about 30' solid and connects easily. I promise you won't be disappointed with this board. Easy to install in any application..the stand alone power is more than adequate for most applications ..I often turnine down as it's loud enough to disturb the neighbors..

Connectivity to speakers and Bluetooth was easy and works with no problems. Connected to a couple of ceiling speakers and sounds fine to me. I'm currently listening to a thunderstorm which had my cat a little confused.I'm using a 12v dc power supply and it's plenty loud enough.

It works perfect as a replacement for my amp to my Fender Frontman 15r that died a ways back. I put a 8" Celestion speaker in it last week and it sounds great. I am going to buy a second speacker and build a box the same sixe as the fender box and run speaker cable across to it and power both off of the amp since I am only using half of them. If I had the money to spend I would be building all kinds of audio projects with these. I love this little but powerful amp that is perfect to double as a Bluetooth for my computer and amp for my guitar. Vollume is a little difficult but not too bad. For the money this thing is awesome.

Just hooked up to my DIY speaker box with a 12 volt 2amp power. The overall connections options on this board are really great! Two sound inputs! BT and AUX cord, two power inputs DC jack or terminal power in with standard screw block connections. Those two things alone are hard to find on a board much less one at this price point.SOUND QUALITY: Overall acceptable. There is obvious noise at high and low levels. You can only heart it while very close to the unit. I will find out if its my power supply or something else when I update. I checked all my connections and didn't seem like it was a loose wire.POWER : I will try with 19volt and 24 volt power and see if I get more sound. At 12 volts it doesn't seem to be 50 watts x2 out. I have another BT board that seems the same volume level so I was expecting more power/more sound volume with this higher rated BT amp.

Was expecting some noise issues as reported under other reviews. There are no noise issues with this board at all. I've bought two so far and both have performed flawlessly. The controls can be easily extended to different buttons mounted on a case easily by soldering wires to the smd tactile buttons. I do recommend using flux to do that however. Power consumption has been extremely good, currently running it on 4 - 18650 cells in series (3.7 volt versions) and have only dropped by 1.3 volts of charge in 24 hours of use. Highly recommend this board! Oh, and no on board voice notice for bluetooth connection, just a chime tone.

Used this on a diy sound bar.Two 3in speakers. Loud enough to hear it good on a hill climb in a 2012 RZR S 800.not much bass though... Could it be the 3 in speakers? Prob should get some hearing protection lol.Edit: I just wanted to say that I'm using a step up power supply that I bought to power a Nakamichi NK1B at ~18VDC. I was modifying it to use in the RZR. Upon re assembly one of the chips on the NK1B board got crushed. This board didn't fit in the sound bar. I mounted it under the seat in a watertight box with the power supply board. This board sounds better than the original. Included some pics of the sound bar to see what it's driving.

Update 9/12/2022The original unit purchased 8/5/2020 still works great. No problems at all. It works so well I bought a second unit this summer for our summer place. It also works great.Original review:It does everything it says. The sound is crystal clear and way loud enough to hear outside on our deck with two Yamaha 8 Ohm speakers on a busy street. I connect to the unit via blue tooth from my phone. So far, it's connected each time since the initial pairing without a problem. I do power the unit down when not in use. When powered up, it beeps first to says it's up, then a second time when it makes the blue tooth connection. I have not attempted to push the sound up as high as it can go as I'm sure my neighbors would not appreciate it. :) I have recommended this to others. I can't say anything about quality or longevity as I've only had it installed for a few weeks now.

These are my favorite Bluetooth boards. Easy to work with, very clear, loud music, long lasting and well priced. The names are easily changeable so you know which one you’re accessing.