I have this cheap voltage regulator (DIY kit). After purchase I have seen that it requires a huge heat-sink AND a cooler.
The input is 24V AC and the output will be around 12V DC and I will be used to power a 20W audio amplifier.
My question is: how this regulator compares with a modern "switching" regulator which requires a much lower heatsink and no cooler.
Do I want to use the above regulator or buy a "switching" one?