MG 20.1 or Wisdom audio m-75

Bin- Its clear you haven't heard the speakers modified.

I never said they were bad speakers stock, I am just telling you that you are not experiencing what the speakers are REALLY capable of without fairly involved modifications. Check with Gladstone here at audiogon- he was doubtful until he tried some improvements himself.

And I agree with Brian that most all 20.1 users are more then likely using them stock- and they have NO clue what they are missing. ¡que lastimo! :o)

They do sound good out of the box, but not in the first-rank of speakers. Modified they do. Whether they must be biamped, as Essentialaudio suggests, is another question. A rebuilt, single crossover with biwire running solely into the bass, probably comes as close to full sonic bliss as one is likely to obtain with the 20.1s. A more powerful amp than the JC-1s, however, is required for the Magnepans.

I am curious.When I worked at Salon 1 Audio,we were delivered a pair of updated Sound Labs that belonged to a customer.These were delivered to the store ,wrapped in burlap.The transformer covers could not be closed {stood ajar} and I wondered to myself who would perform a modification to their product in this fashion,and still again-ship without adequate shipping containers.Another issueis the SL Ultimates.I saw that they had gone to a metal support structure.A friend was practically electrocuted,due to the fact that the electrostatic panel was arching to the metal frames.
I certainly hope all these issues have been addressed.It might come as a potential "shock" to the customer.

Tpsonic, Sound Lab builds proper crates for all of their products, as they don't care to have them come back broken. Their backplates are designed to fit into the rear frames or enclosures without charged components being exposed - it is something they cannot risk. Likewise, there would not be a risk of shock even with the Ultimates which employ tubular steel frames for increased rigidity when the backplates are installed per factory instructions. As for arcing panels, although this rarely occurs, I don't see why this would be a factor, as they are not electrically attached to the frames...I should know, I am a Sound Lab dealer and own Ultimate-1s. You might discuss such concerns with the good folks at Sound Lab before making such statements, as they really do care and always try to do the right thing. Sound Lab has been successfully making their electrostatic loudspeakers for twenty five years and has diligently dealt with all aspects of their products, and they continue to service virtually every model made. Since the mid 80s they have made evolutionary updates to their full range electrostatics, conservatively employing new technologies and materials only after exhaustive in house testing. The results speak for themselves.

Brian

Tireguy:

Do you own 20.1s, and have you compared a modified vs unmodified version?