I have not owned either, but have listened to both quite a bit in the past.
Even though the 5As have the active 400 watt bass amplifier to handle the bottom end, your 50 watts of SET power may not go as far as they need too.
The Prodigies are 91db sensitive VS 87db for the 5As. Of course there are quite a few variables, room size, room composition, listening level and the type of music you listen to.
Electrostatics will always have that seductive "air" that other speakers can't touch.
The 5As ( when properly dialed in ) will have room/bass integration and coherence as good as or better than any electrostatic and will completely blow you away.
For what its worth, my local Vandersteen dealer felt that 60 watts of OTL wasn't enough for his personal 5As.
If you are happy with the sound that you have now, roll with it.
If you have an itch to experiment, you may need a more powerful tube amp to reach audio nirvana with the 5As, but it will have been worth it.
I went from ESLs to Horns.
Even though the 5As have the active 400 watt bass amplifier to handle the bottom end, your 50 watts of SET power may not go as far as they need too.
The Prodigies are 91db sensitive VS 87db for the 5As. Of course there are quite a few variables, room size, room composition, listening level and the type of music you listen to.
Electrostatics will always have that seductive "air" that other speakers can't touch.
The 5As ( when properly dialed in ) will have room/bass integration and coherence as good as or better than any electrostatic and will completely blow you away.
For what its worth, my local Vandersteen dealer felt that 60 watts of OTL wasn't enough for his personal 5As.
If you are happy with the sound that you have now, roll with it.
If you have an itch to experiment, you may need a more powerful tube amp to reach audio nirvana with the 5As, but it will have been worth it.
I went from ESLs to Horns.