Originally Posted by DHF
OK - so aside from the adapter thing. One of my MS4s started sounding bad - I mean really bad. Ran a frequency sweep - between 40 and 80 hz - the woofercone moved very visibly and made a rattling sound. Even though Auduyssey crosses over at 80 Hz - some sound still comes from the speaker.
So I talked to Steve - he tells me to go to Sound Organisation and talk to them. New Euphonia woofer is $650. I was glad I was wearing my brown pants....
They asked me if I had tightened the speaker screws recently. I was wondering what that had to do with anything. They told me that if the screws are loose, it can cause that to happen. I was skeptical, to say the least.
They go on to tell me that all the screws on all Dali speakers should be tightened annually. Never heard of this. Could not imagine it causing the audio disaster I was hearing.
Went through Center, right, left. Every screw was loose - easy to hand tighten a full turn. Turned it on - frequency sweep. Bad noise gone. Shocked, surprised, happy.
Moral of the story - get a star screwdriver and gently tighten your drivers.
Wow, cool, good work! I'm glad it was something so simple. BTW, never, with all the various models I've owned (3 Euphonia and 9 Helicons) have I come across one loose screw on a driver. And I too have never heard of tightening them yearly. (Though I do the recommended annual oil change and replacement of the 50 to 60 Hz adapter.
So here's another almost-heart-attack MS4 story. I heard a nasty rattle from one of my MS4s right after I transported it by car. I'd purchased the pair used and was running some sweeps (No Audyssey, speaker set to Large/FullRange) to make sure it was functioning properly-it sure wasn't.
I checked the gold speaker wire lugs for loose nuts and all the screws around the drivers. All were tight. To my horror, I isolated the sound to the upper woofer.
Warning1: the squeemish should skip ahead to the happy ending.
Warning2 : do not try this at home-I am a trained speaker repairman (well, I was when I was 16 yrs old)
I tried to remove the driver. The screws all came out easily, but it refused to budge. No, they're not glued in, but they can become firmly attached to the baffle over the years. So I removed the tweeter assembly so I could reach in and gently push on the speaker magnet/frame. It still wouldn't budge. Frustrated, I gently explored inside to see if anything was loose. I could see very little but feeling around, I found one of the wire leads to that woofer had shifted during transport such that the cone rubbed on it. Pushed it aside.