The Sound Labs are a different sort of beast. Like most ESLs, they don't work so well with amps that can double power as impedance is halved, since the Electrostatic principle doesn't rely on a driver in a box...
The impedance curve of the speaker varies by about 10:1 from the bass (peaks at 30 ohms) down to about 3 ohms at 20KHz. But the efficiency of the speaker is about the same though that entire range; for this reason most *but not all* solid state amps will tend to sound bright on them. A Brilliance control is provided to help tone this down a bit, as well as jumpers to allow for more bass, since all solid state amps struggle to make power in the bass region. This is why a tube amp of 140 watts can easily keep up with a solid state amp of 600 watts on that speaker!
Tube amps will stabilize much quicker than solid state (in terms of warming up to get where it needs to go to sound right), so with a good tube amp you should be having the system very near its ultimate warm-up in only an hour, and really sounding quite good in only 15-20 minutes.
The impedance curve of the speaker varies by about 10:1 from the bass (peaks at 30 ohms) down to about 3 ohms at 20KHz. But the efficiency of the speaker is about the same though that entire range; for this reason most *but not all* solid state amps will tend to sound bright on them. A Brilliance control is provided to help tone this down a bit, as well as jumpers to allow for more bass, since all solid state amps struggle to make power in the bass region. This is why a tube amp of 140 watts can easily keep up with a solid state amp of 600 watts on that speaker!
Tube amps will stabilize much quicker than solid state (in terms of warming up to get where it needs to go to sound right), so with a good tube amp you should be having the system very near its ultimate warm-up in only an hour, and really sounding quite good in only 15-20 minutes.