Power amplifier input sensitivity setting. 1.4V or 26db

Hi all,

I wanted to get your input on this subject.

I've got an old Crown CTs2000 powering two Peavey SP-5 speakers. My friend is using a Yamaha MG10 mixer; sending the (stereo outs) to the Crown balanced inputs.

The Crown has sensitivity settings ( 1.4V, 26db, 70V ); right now I have both channels' sensitivity settings at 1.4V.

Is that the proper sensitivity setting? 

I'm assuming the Yamaha MG10 stereo outs are Line Level.

Thanks for any input.