Amps …used to be on FK’s Wave forum which was frequented by a lot of disco soundsystem guys from the 70’s/80’s. I think their verdict at the time was that it was different from the sound of the original, but not necessarily worse, there were some issues with the original mixer like crosstalk that were rectified on the LE.
There’s a fella called Mario G who is on some of the soundsystem forums that sells original Urei/Bozaks but completely reconditioned, new faceplates, back panels etc. He also does a lot of the commonly requested mods, removing the balance controls, external power supply etc.
Thing to remember with Urei/Bozaks is that they really colour the sound, can be fantastic when playing more ‘live’ sounding soul & disco records, but not necessarily great for modern digitally produced/compressed tracks.