Except for the Ref 3A De Capo and the Merlin TSM Black Magic speakers,these are not personal experience recommendations. Like others who made suggestions of other speakers within this tread, I am suggesting you research/ listen to them. This is based on the Sensitivity, and impedance load of the speaker that should work well. Since the amp has a 8ohm transformer tap only, and the manual says not to use speakers that drop below 4.3 Ohms, my suggestion were based on that, reputation of the speaker, and reviews I have read , and speakers I my self would consider. Also price range similar to the Merlin TSM played a roll.
If you would have asked for real world experiences, I would have only been able to suggest the above referenced Merlin and Reference 3A
I have the SJ Revision (So no not the latest which would be the K with the V-cap and RCA receptacle changes). Still use E34L JJ Power valves (newer) (Looking into changing to Sophia EL34 power valves). Have a Telefunken 6922 gold Pin Installed, and Radiotechnique 12AU7(s). Have also tried Phillips 6922 gold pin, and Amperex JN7308 gold pin. Have replace all the fuses (rail and supply power) with Synergestic Black Fuses. Have the optional Cardas Clear Lite PC. The Amp also has the BAM receptacles.
Wanted to change out the coupling caps to V-caps, but it didn’t work out when I had the Fila in for service at Signature Sound (no burn in Caps avail from Ars Sonus.
I use Cardas clear Lite speaker wires (couple pair but not all of Cardas IC’s) and a Powered REL 305 Sub to fill in the bottom end.
Let me know if you should have any other questions, you can send a PM.
If you have made any changes to your Fila, I would be interested.
Brad