A:AnswerHello ARB,
Great Question, The 301 speakers are too heavy to be used with these floor stands. Bose offers their own unique floor stands and wall brackets for these speakers.
A:AnswerThank you for reaching out to clarify. The series II brackets are the correct ones for the 525 III (we understand that can be a little confusing). These brackets have an adapter specifically for the slots in the back of your speaker.
A:AnswerCertainly, please call Bose technical service at 800-367-4008 and we'll be able to help you order a replacement part. Support hours are Monday - Friday 9:00AM to 9:00PM and Saturdays from 9:00AM to 7:00PM EST.