Amplifier Board

Very good product very good volume control

Neat little low-power amplifier works perfectly on my prototypes with cheap 4 Ohm speakers.

I bought the 5W+5W version of this amplifier for use with a 32" LCD TV and a pair of unpowered 8 ohm bookshelf speakers. It is being powered by the USB port on the TV. The input is connected to the TV's headphone output. The resulting sound is much better than the TV's internal speakers. I was surprised at how loud the speakers could get with this set up. Normal viewing is with the volume at about 1/4 but even at full volume the sound isn't significantly distorted. I took away one star because there is no EMI shielding. When the amp is close to the TV you can hear a little buzzing and hiss. You'll want to keep it away from EMI sources or use a shielded project box. I rated it "easy to install" because of the standard 3.5mm stereo connector and the screw terminals for the power and speakers. Check out the companies web site.

it worked great for what I needed. Plenty of volume and small size.

I’ve bought several of these tiny class D amps for tinkering and faffing purposes, starting with the pam8610, which also has quite a nice sound to it, but the lower power 8406 contained in this board has really made made quite an impression. I wanted something to drive really sensitive open baffle speakers, and being terminally short of cash a tube amp was out of the question. With this wee feller, my zenith cz49s come alive and fill my world with beautiful music. The documentation says that this is capable of being used as a class AB amp, but doesn’t say how. The 5v rating is good because you can plug it into a usb cube phone charger and not have to worry about a power brick. I will try it out with more demanding speakers, but for now this is superb!

Edit: Although I tested the input line with a meter between the input end of the 1/8" stereo wire and the circuit board, it appears that the "stereo vs mono" issue I described below was an issue with the jack connection on board. I think the input jack is slightly too far back from the outside edge of the amp board, preventing a true stereo input connection. I am going to de-solder the input jack and wire my input directly to the pads- I will report back with another "Edit" if the amp board ends up being mono after all. This amplifier sounds nice for its size and is nicely built for the money, but the output signal is not stereo. There is no left and right channel output imaging; when listening to more "nuanced" music some of the elements of the music are simply missing. Therefore it doesn't even "sum" the input signal through the outputs either(that would still be mono, but better than this situation). It is either using the right or left channel and amplifying that side of the input through both channels of the output. I checked the 1/8" input jack with a meter and a connected 1/8" to 1/8" TRS wire and found the jack is standard, therefore it must lie within the way the circuit is wired internally on the board. If you go to the company's website, there is a customer question relating to whether this amplifier is stereo or mono which is unanswered by the company.

The quality of the solder mask is impressive. Music sounds decent, but of course two 5W speakers is not going to turn any heads. My application is just for a raspberry pi smart Google assistant. For spoken words, the speakers and amp sound terrific.

I've been ordering these amps for years - have used them in a variety of DIY projects and commissions. What i LOVE about the most recent version (v5) versus the earlier version I was using, is the addition of solder pads for power input, speaker outputs, and audio inputs! Sometimes when I'm building a project for installation, I want to know that the wires will not wiggle loose, or perhaps I'm using wires thinner than ideal for the screw terminals. These solder pads are super handy! I would love if V6 made them through-hole instead of merely surface mount, but I won't complain. Love these little amps. The sound is the best I've heard from a small, low-cost amplifier module.

Todo bien buen sonido dentro de lo que cabe. No es sonido pro pero esta bien

Great little amp that can run on Raspberry pi projects. I made a power supply out of a USB cord for use in an Rpi. Works perfectly. Sounds great - clear and loud.

It sounds really nice and hides the frequency generated from the supplied power really will! the output of the speaker is independent of the power source which means that neither audio source nor power source need to be grounded with the same wire. would definitely recommend it!

Lo usé para un proyecto escolar con arduino y funcionó a la perfección

I'm using this with a Raspberry Pi 4. It worked perfectly, and really amplified the input signal, as long as the input was strong enough. There are extra features I didn't realize it had, like switching amplifier type. I didn't use these, but I appreciate it an option.