Hi, new to the site as of today. Audiokarma has been my main hangout recently. I purchased the other day a beater set of 825 cabinets that I am in the process of restoring. Not to long ago I bought at a flea market a set of old Community PA system with 90 degree radial horns and mid bass 15" horn loaded speaker cabinets. Took them home, hooked them up and I was immediately enlightened to the benefits of high efficiency horn loaded speakers equipment driven by my Sargent Rayment el84 tube amp. The empty 825s showed up on the local craigslist for $60, so I could not pass them up. They appear to be home built, but for the most are well done, and match the plans I have seen on. I will utilize the speaker I have for the time being out the the community equipment, plan on updating to the appropriate speakers, drivers and horns in the future, when money allows. My question at this point, and I'm sure its been covered many times in the past, but I'm new here. I understand that the original cabinet design can be very resonate, and I was wondering if the are any write ups on bracing, and dampening of the cabinets, or if anyone has any specifics on how they did it, along with any other ideas on how they can be improved. I have looked at them and have some basic ideas on what would probably work for bracing and dampening, but thought I would go to the source before I got started, for other ideas and opinions on what works best. Appreciate the help in advance. Thanks