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Tweeters are silent on my Wilson audio Sofia 2

Hello everybody, I’ve had the Wilson Audio Sofia 2 for over 10 years , always had a feeling that there were lacking the crisp clear highs I’ve enjoyed from the previous Sofia 1 .
I changed locations , amps , speaker cables , processor to no avail - still very muffy dull sound lacking treble/highs in all types of music , in both stereo and multi channel .
I already changed the resistors - no change in sound .
I hooked up to the same set up other speakers from another room (SVS Ultra , B&O) and also my center channel Wilson Audio Watch speaker and I am getting great sound so I know it is not my gear that causing the issue.
Gear used :
Speaker cables :Transparent reference MusicWave Super.
Amp : Emotiva XPA 2 -Gen 2 & Outlaw Audio 770
Processor: Marantz AV8805
CD : Marantz 6007
Subwoofer : Velodyne DD 15
Surround in wall speakers : SpeakerCraft AIM Cinema 5
Interconnects : Mogami XLR for main and sub and Transparent audio RCA to rest of the speakers .
Did anybody encounter or heard of this issue ? Any input is greatly appreciated.


jetset
jetter
3,033 posts
 
With some speakers it can be difficult to remove the tweeters. If it is not with your speakers I would take one out, if for no other reason, to see if the internal speaker wires are properly connected.

I am hoping that someone here can help you check they are working or not once you have them out. Assuming you have determine that the internal speaker wires from your crossover were correctly attached to the tweeter.
johnk's avatar
johnk
1,975 posts
 
Pull tweeter check for continuity with a multimeter.  They may have used a ferrofluid in the tweeter VC and I think this model been out for 15 years or so and could have issues with old ferofluids or just time itself. 
oldhvymec
5,101 posts
 
OP, pull the tweeter out and give it a visual. Then ohm it out. Maybe they are blown. Smell funny? Like electrical burn.. Is there no resistance or maxed out? Disconnect the driver to check, ay..

After that, it’s wire or crossover..(you changed the resistor).

You’re not running some weird main cable are you? With a hi pass filter in it are you? Like a Transparent?

Some of those cables will cause all kinds of problems, like amp oscillation.. Depends on the amp..

You ran a new piece of cable just to check? CHEAP zip cord will work fine.. LOL may be the cure..

Happy hunting..
jetset OP
12 posts
 
Thank you all for the advices . I did run a different 12 gauge speaker cable to the speakers and it was the same outcome - no tweeter sound .
I'll take a loser look at the tweeter and advise of the findings .
erik_squires
16,116 posts
 
I just saw the rear.


Could you have swapped the mid/treble connectors at any time?

Sre you absolutely sure it isn’t your mids?? About 80% of the music we hear comes out of them.  Many can't tell when their tweets stop working. :)

Disconnect both of the drivers on the top, and test for resistance. Should get 3 to 6 Ohms on each driver. Anything that reads 0 or infinite is bad. Leave the drivers disconnected.

In the resistor panel, measure the resistance across the nuts and make sure you get what is expected based on the resistors. Again, test both tweet and midrange sections.




Best,

Erik
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