SOTABEAMS is now stocking a replacement speaker for the FT-817. The stock speaker is easily damaged if you use the radio in wet weather. This dulls the sound of the radio. The replacement speaker has a mylar cone and so is immune to water damage. It also makes the radio sound louder and brighter. It's a quick and easy upgrade!
More Details - https://www.sotabeams.co.uk/replacement-speaker-for-ft-817/