I think so, for checking I think you will want a professional restorer shop to do the inspection and checking of crossover, maybe driver surround (the ring of foam/rubber along the edge of the cone) to make sure you don't mess up anything, for amps I personally think that any current Hypex based class D amps should be way more than enough for your needOK - interesting discussion, thanks everyone for their input. There seems to be a majority opinion that I should a) measure to make sure they are working correctly b) if not, possibly service the crossovers c) look at getting better amplification.
- I will definitely look into the suggestions about getting a calibrated mic and appropriate software and measuring the 105's response in my room. Is this the mic you'd all recommend? https://www.minidsp.com/products/acoustic-measurement/umik-1?lang=en
- I just found the REW software home page so will look at that. looks like it will run on my Mac laptop so that's good.
- I can't see or feel any damage to the drivers - just removed the grills on one speaker, there is no friction when I very gently move the cones on the woofer and mid-range. and no mysterious fluids dripping out . I'm scared to mess with the tweeters but they look fine through the grills.
- Assuming I find a problem that could be attributed to the crossovers.... I'm not sure what is involved in opening up the KEFs to get to them, without damaging the cabinets. If anyone has done this or knows someone who has done this, and could provide guidance, please let me know. Or if anyone knows a shop in Los Angeles that would re-cap the crossovers for a reasonable cost, let me know...
- I will look into replacing my amp with something with more power. I actually have a Nakamich 620 power amp that's been sitting idle for many years. It is 100wpc but perhaps better quality than my Sony STR-DN1040? I have no idea. I also have the matching 630 tuner/preamp but it needs servicing (noisy potentiometers). maybe just some tuner spray but that's a whole project to figure out how to take it apart (and put it back together). Though I think I have the service manual somewhere.
- If there are major problems with the room acoustics then it seems there is a whole new adventure required to look into the world of equalizers and associated equipment...