Safe load for tube amp??


I have an old pair of Stax SR Lambda electrostatic headphones with SRD 7 Adaptor.
Does this present a safe load for a transformer coupled tube amplifier?? My amplifier is a PrimaLuna Dialogue Premium Integrated amplifier.
thanks
mabonn
I did some digging and found no useable intel..I suggest you post this in Head-fi.org....
I do know that Transformer coupled amps like low impedance cans if that helps..
I have an old pair of Stax SR Lambda electrostatic headphones with SRD 7 Adaptor.
Does this present a safe load for a transformer coupled tube amplifier?
Yes, make sure you switch between speaker and headphone while the tube amp is power off.

 http://web1.kcn.jp/tube/SRD7kairo11.jpg