Diagnosis
No, it is not normal. A loud pop or crackle from the driver during power cycles indicates a fault in the amplifier circuit or a failing capacitor.
How to Fix It
First, perform a full reset. Power the speaker off. Press and hold the Power button for 10 seconds until you hear a tone. Release. Turn it back on. Test if the pop remains. Ensure the speaker is fully charged, as low voltage can cause circuit noise.
If That Didn't Work
The internal amplifier has a defect. This is a hardware issue requiring repair. Contact Bose support. Document the issue with a video if possible.
Heads Up
Do not continue using a speaker that makes loud, unexpected noises. This can indicate an electrical fault that may worsen or damage the 2-inch full-range driver.