Do you have JBL or Altec both were made with horn drivers but the "Voice Of The Theater" were made by Altec. It doesn't matter all that much with regard to amplification as both were very highly efficient.
These speakers do best IMO with tube amplification. That said I would stay with your pre but not recommend ARC amps. I would choose a more lush amp to work in synergy with the speakers. There are numerous possibilities with these as they don't require a lot of power.
If you go SS find amps that are "musical" or warmish. One of the SS possibilities is an older McIntosh amp, which I have used with some success.
There is one thing that I have not done with my own vintage gear (JBL and Klipsch) which is to ensure that the (Alnico) speaker magnets are working at full capacity. I would have to ask others how that is done.
These speakers do best IMO with tube amplification. That said I would stay with your pre but not recommend ARC amps. I would choose a more lush amp to work in synergy with the speakers. There are numerous possibilities with these as they don't require a lot of power.
If you go SS find amps that are "musical" or warmish. One of the SS possibilities is an older McIntosh amp, which I have used with some success.
There is one thing that I have not done with my own vintage gear (JBL and Klipsch) which is to ensure that the (Alnico) speaker magnets are working at full capacity. I would have to ask others how that is done.