Magnepans are planar magnetic speakers, not elestrostatics and present a relatively benign resistive impedance curve as far as I know. They are somewhat inefficient and are said to benefit from a high-current amp design. On the other hand, purely electrostatic planar speakers, e.g. large Soundlabs, require amps that can produce proportionately more voltage than amperes. Theoretically it may be beneficial to drive a hybrid ESL with a high-current amp powering the dynamic driver(s) and a high-voltage amp to power the ESL panel.
If you divide the amp's power output in Watts (voltamps) by the voltage it will give you the amperes; and if you divide the Watts by amperes it will tell you the voltage.
I don't know if this clears anything up for you, but I think it is important to know the load characteristics of the speaker you intend to drive -- before you buy a high-current amp to drive an electrostatic speaker that may be better served using an amp that can produce proportionately high voltage. Since many electrostatic speakers dip to very low impedance in the high frequencies, you also need to find an amp that is stable into low impedance loads. As far as I know Magnepan's do not exhibit a low-impedance dip.
If you divide the amp's power output in Watts (voltamps) by the voltage it will give you the amperes; and if you divide the Watts by amperes it will tell you the voltage.
I don't know if this clears anything up for you, but I think it is important to know the load characteristics of the speaker you intend to drive -- before you buy a high-current amp to drive an electrostatic speaker that may be better served using an amp that can produce proportionately high voltage. Since many electrostatic speakers dip to very low impedance in the high frequencies, you also need to find an amp that is stable into low impedance loads. As far as I know Magnepan's do not exhibit a low-impedance dip.