can I use my MacBook speakers at the same time as a bluetooth remote speaker?

Hi peterbur,

Great question! We're glad you've come out to Apple Support Communities for help playing audio from both your MacBook speakers and your Bluetooth speaker. We've got a great resource to share with you.

It's possible to combine your MacBook built-in speakers and the Bluetooth speaker by creating a Multi-Output Device using Audio MIDI Setup, then choose this option as your audio output. The following guide has more information:

Play audio through multiple devices at once in Audio MIDI Setup on Mac

We're here for you if you've got any questions!

Have a great day.