Guru
Joined: 05/10/2019
Location: United KingdomPosts: 9030
| Posted: 03:59pm 16 Dec 2022 |
PAM8403 stereo amplifier modules on ebay. Will run from 2V5 to 6V. 4R or more speakers. No good for headphones as they have bridged outputs. 1.90UKP. These are class D and bridged so will probably give plenty of output (about 0.5W per channel at full volume, about 85% efficiency) for what you want. Quite capable of driving proper speakers if you wanted to.
You should put either the simple RC filter from the manual or, much better, Volhout's filter before this. The version with the volume control might be a good idea as 0.5W can be surprisingly loud!
Edited 2022-12-17 02:08 by Mixtel90