1M ohm = 1000k if that helps
The 400R runs class A up to about 20W/channel.
Rated power is 225 W/Channel into 8 ohms, more into 4 ohms.
The voltage gain of AVA power amps is about 25
It takes 2V to drive the 400R to full power
The amps also have a very high input impedance so they are easy loads for a preamp to drive.
The input impedance is 1 megohm, it's a triode input
according to Frank
Last edited by bscp on Sun Feb 24, 2019 10:46 pm; edited 1 time in total (Reason for editing : explanantion)