Seeing those Acoustic Monitor speakers really brought back memories. Back when they were being sold (about 13-14 years ago) i worked for a hi-fi retailer that also sold speaker components. We saw these things almost every day. The woofers had magnets smaller than most tweeters, the mid and treble controls were almost always burned out.
There was no crossover, just a couple of in-line capacitors. The standard fix was to bypass the controls entirely, replace all the drivers and install a basic crossover. This could be done for around $40 per speaker with components that were still vastly superior to the original units. Used to love telling people what they had bought. The company selling them used to land them in the country for $60 per pair and the cost per pair to the van driver was $200 per pair.

Simon.