Can the DJI Mavic 3 Enterprise Series work with the speaker and the RTK module at the same time?

No, the DJI Mavic 3 Enterprise Series cannot work with both the speaker and the RTK module simultaneously. The aircraft's design allows for the attachment of either the speaker or the RTK module, but not both at the same time. This limitation is due to the specific mounting interface and power requirements that each accessory demands from the drone.