I understand your concerns and questions. The forum can be a scary place as everyone has an opinion that may not be exactly right. Anyway, I will give as much info as I know about these Klipschorns. All the components work correctly. These speakers were rarely used within the past 15 years. Most studio monitoring has switched to smaller "nearfield" speakers. The reason the cabinets got scratched up is because, when they were installed in the control room, they sit (behind grill cloth) upon a four foot high cabinet, (see my web site at www.hilltopstudio.com and look at studio A and notice the large speaker in the corners...the Klipschorns were behind that grill.) To be able to have the horns angle down toward the engineer, they had to be removed from the original cabinets. These horn cabinets were stored and moved around for years and became scuffed. I recently rejoined all the parts back to original when I took the speakers out of service. However the lower grills must have been discarded at some point. I really don't think these are hard to build...they are just frames with some grillcloth on it and it is designed to cover up the angled bass horn cabinet on the sides. Also the screening on back of the bass cabinet has NOT been removed. The speakers never really worked very hard at the studio as most of the type music recorded there is country, bluegrass, or southern gospel (No rock or rap stuff!) I do know that we replaced the original K-33 woofers with K-43 types sometime in the early 80s. The tweeters may have been replaced along the years also. I know that they are K-77M. I have heard these speakers literally shake the walls with low freq. The serial numbers should tell the vintage, but I don't think they are older than late 70s. (I thought 1977). The type AA crossovers were purchased by me and installed, because the studio had been Tri Amping with an electronic crossover. The reason that the "tailpiece" is missing (not ripped off) is because the engineers at the studio had crafted a thicker top and tailpiece that they thought made the speaker more efficient. I decided to remove this piece to get the cabinet back to stock condition. True the tailpiece needs to be put back on. Again, this is just a piece of plywood that can be cut out and screwed on...simple fix. The cabinets must have been finished in a walnut stain by someone else since the model number suggest that they were "walnut raw" (WR). Sorry, but this happened before my time knowing these speakers. As I said, The finish on the top is scratched and to be showpieces, they need to be refinished anyway. Also, the studio had painted the back of the bass horn cabinet black on one side. I believe this was for cosmetic reasons to keep the speaker from showing through the grill cloth frames in the studio. This paint is only on the rear (on one side) of the bass cabinet, and not visible on the front. These speakers are good mechanically. Only a little work on the grills, tailpiece, and finish will bring them back to original condition. I could do the work myself, but would have to charge more for the speakers. Perhaps all the components are not exactly stock for this paticular serial number, but they all are factory Klipschorn parts and work properly. I dont claim that these Klipschorns are like new. But they are overall in good shape and perform great and well worth the price of $1500.00.