In which ampere amount that the Soundcore 2 portable speaker should be charged? By using an adapter with 1A or 2A rate?
Either adapter rate will work to charge the speaker. Please note that with the 1 amp charger it may take a little longer to fully charge
Pretty sure the soundcore 2 charges at 2amps so the 2amp charger will give the the fastest change but like @elmo41683 said either will work and not damage your speaker.