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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

Showing 5 responses by erik_squires

erik_squires
15,948 posts
 
My bad guys, I was looking at incorrect images for a different Wilson which exposes the tweeter and midrange jacks in the back. This speaker clearly does not.

I’d start by checking the resistors under the panel in the rear. I suspect they are open. To test this, put a wire between the tweeter jacks, and play music  _VERY_ softly at first, and turn it up and see if your tweeter is magically working.

If so, that’s your problem.
erik_squires
15,948 posts
 
Sorry, it seems that I'm not looking at the back of a sophia. .... let me see what the manuals say.
erik_squires
15,948 posts
 
I'm going by these images:

https://www.acousticgallery.fr/produit/wilson-audio-sophia-2/

Based on that, in the rear the left jack is for the midrange, and the right jack for the tweeter.  Disconnecting that speaker cable from the lower cabinet should let you measure the tweeter directly. Your average multimeter here will let us see if the tweeter voice coils are open or shorted or reasonably working.
erik_squires
15,948 posts
 
Hi OP!

Unfortunately I can only go by pics I see on the internet. You should be able to do all the testing I suggested via the jacks on the back.  Disconnect the speaker cable and measure across the tweeter jacks.

Best,

E
erik_squires
15,948 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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