Luxman M-117 Amp, Need Info Input impede

Looking for some help.
I need to find input impedence of this amp,
I need this info to set my Vandersteen sub correctly.
Isnt Luxman made by Lexicon? Lexicon has a web site.
I believe it's about 50K maybe a little higher.
Hey Eddiemc. I have a Luxman receiver and the product information guide for many of their products. Your M-117 amp has an Input Sensitivity/Impedance of 1 V/37k ohms. Happy tuning.