First time poster here. I'm upgrading 3x La Scalas from the late 70s, and have many questions for the community. My purpose is to use the speaker in a recording studio setup for playback along with either live drums, guitar, and bass. I love how lifelike the La Scala reproduction is, and jamming along with the records is going to be amazing. One of the LS is total stock with AA, and the other pair is recapped AA, but with blown tweeters. The guy tried a DIY mod by drilling out the tweeter horn and GLUING on an APT-50-2. So right now, one APT 50 is dead, and other one works but unglued and sits loose on top. 1) Is there an adapter to attach the externally threaded APT 50 to the stock Klipsch tweeter horn? I know it may not be worth doing, but I was thinking it would be better than no tweeter, or having a loose driver sitting naked on top of the cab. The stock LS needs recapping, so I bought what I think is a modern AK-4 crossover #116601 (pic attached). 2) I'm confused by the separate inputs for HF / LF on the crossover. Is this to allow bi-amping without an active crossover? Is there a way of telling if this is a LS or KH crossover?
Right now I'm using it in a 3-channel in a surround mode on a thrift store Yamaha HTR-5860, and it sounds fantastic, even with just 1.5 working tweeters. Before that I had used a HK 730, which I love on other speakers, but on the LS it was too shouty. Also have various amps and a 1960 Telefunken EL84 tube radio to try. Am thinking of cutting up all or some of these LS and installing 511b horns, and I have already noticed liking the tweeter location much better above the enclosure, as if you are standing up, the stock tweeter height is too low. Lastly, 3) does anyone have a preferred tweeter replacement when comparing the DE120 MAHL vs Crites horn?
Thanks in advance for any thoughts. Trying to do this DIY on the low end side of budget. The LS were a little less than $400 each.