Worth a listen absolutely.......
Personally prefer the 57s over 63s.
63s have glue and build issues.
Have stacked 57s and a single pair...
Started with a single pair on wheeled stands which are a must if u ask me, and easy to diy.
They need to be into the room to breathe from the rear.
Single pair-
When listening to Nina Simone especially with these speakers they,make the hairs on the back of my neck stand up!
They pick up the plucking of strings and the breathing of a singer in a way that i have not heard in any other speaker i own.
The realism on vocals and detail retrieval is just amazing,so unique.
Limited in bass extension and top end,due to this it can limit your choice of music.
The bits they do well are excellent and believe everyone should try a electrostatic speaker at some point in their speaker journey.
Stacked -which u will want to do eventually anyway...
I started with a single pair loved them and just wanted a spare set
A full rebuild is silly money and the original panels sound the best.
A stacked pair turned up and were local,there is a huge difference in my opinion both in size and sound......
Amps -x2 303s is really nice stacked as is a single 303 on a single pair.
Leak stereo 20 is the best sound i have had on a single pair
Radford sta25 and quad II are nice and swap em in and out..
Grill condition gives u an indicator of how they have been kept ie moved a lot or just bashed in and out of storage.
All mine have mint grills and after removing the backs and cleaning the dust covers and inspecting everything is fine and discovered the quad service stickers on all of them(usually on the transformers) .
You are in a great position as u have Tannoys for the heavier stuff..(until u go stacked
Stacked do volume and scale on a bigger scale ....
I have a friend who services them and has been doing it for a very longtime.
Stacked especially can run a big amps.....
He has stacked and is of the opinion original panels are better.....
Anyway feel free to pm if i can help.