By the ACLU's own standards they aren't protected.
https://www.aclu.org/know-your-rights/protesters-rights/#im-attending-a-protest
You don’t need a permit to march in the streets or on sidewalks, as long as marchers don’t obstruct car or pedestrian traffic. If you don’t have a permit, police officers can ask you to move to the side of a street or sidewalk to let others pass or for safety reasons.
https://www.aclunc.org/our-work/know-your-rights/know-your-rights-free-speech-protests-demonstrations
You may use amplification devices as long as your intent is to communicate your message, not to disturb the peace.