“I really like this pcb. Of course it would be so much better if it could give something for nothing, i.e. not need 12V supply to deliver 20W, but do it from a LiPo. But perhaps that is the fault of physics rather than this board? The issue for us is space, how can this be incorporated into a moveable tactile object like a wooden hollow form, without having a power supply lead or have a large/heavy battery hidden inside a relatively small object that is then out of balance...?
It is a creative challenge and a good one to ponder... for projects that have a power cable or enough space to include a 12V battery, it is great.”
“This amplifier, a couple of 4", 21 Watt RMS speakers for about ВЈ15, a universal laptop supply for about ВЈ12 and a wooden case make an excellent boom-box for your phone, computer etc. The amp provides enough power to severely rattle the speakers and necessitate nyloc nuts to secure them in place! A 12 volt, 4 amp supply will be needed for full power so the usual unit used for an Arduino, say, won't be enough.
My only criticism is in the surface mounting of the power socket. The pads are just not strong enough to secure a socket of this size. (Look at the Arduino Uno, for instance. Its power socket is soldered through the PCB.) Recently, a small accidental tug on the power lead caused the socket on my unit to pull away from its pads. I recommend that power be transferred from the screw terminals to a separate panel-mounted socket to avoid any problems.”
