I've built a couple of TDA based amps. These will push a 4x12 without issue over an acoustic drumkit and are dead cheap, powered from a 19v laptop power supply.
https://www.madbeanpedals.com/forum/index.php?topic=33275.msg31940
https://www.madbeanpedals.com/forum/index.php?topic=33305.msg319680
https://www.madbeanpedals.com/forum/index.php?topic=33275.msg31940
https://www.madbeanpedals.com/forum/index.php?topic=33305.msg319680