I only have the manual for the KN800 which was a lot different from the 1000. yes I am sure you can use an expression pedal as I have one hooked up to the KN800 when ever I use it, but it has to be a Technics Expression pedal. I tried several others but none worked. The one expression pedal I have from Technics works on my KN7000, KN2600, KN6000, KN3000 and KN800.
BEBOP