A:AnswerIt is but i would recommend the Manfrotto MK290 as it has true fluid video panning https://www.bestbuy.com/site/manfrotto-290-tripod-with-fluid-video-head-black/5802915.p?skuId=5802915
A:AnswerThe threads are standard 1/4" machine threads like those found on most speakers. Yes, this would attach easily and provide a secure mount for your Bose speaker.
A:AnswerYes, the one I purchased from Best Buy comes with a bag, phone holder and the connector screw nub that attaches your camera or phone holder to the tripod. I love it because if can adjust to any height I want for my camera. Good Investment. Hope this helps.