The issue has to do with the efficiency of the speaker and its impedance.
As for the latter there is a simple solution, a device called the ZERO that will allow tube amps to drive the low impedances at high frequencies that are often seen in ESLs.
The efficiency issue will then have more to do with the specific model of ESL, the room and your listening preferences.
As for the latter there is a simple solution, a device called the ZERO that will allow tube amps to drive the low impedances at high frequencies that are often seen in ESLs.
The efficiency issue will then have more to do with the specific model of ESL, the room and your listening preferences.