Soundlabs are the best sounding electrostatic loudspeaker I have heard. Twb2 has discussed the improvements and upgrades that has increased reliability. I prefer the non PX panels and have had no issues. Soundlab increased the thickness of the non PX Mylar which increased their reliability. As stated, the Torrid II has made them more efficient and easier to drive. There are 2 different types of backplates offered as well. I recommend the " hotrod version." I own the A3's.
