Fulltone Choralflange supply voltage

[RCM78]

Can I run a choralflange on 18vdc without damage to the pedal? I seem to remember you could...

[JRC4558Dude]

Nope. 9v only, as far as I know.

[Ben C.]

FYI:
http://www.fulltone.com/user_manuals/CF1manual.pdf

"DC Jack: this is a standard 2.1mm Barrel Jack connector, and is configured (like most effects) with the Center Pin being Negative. It is HIGHLY recommended that you use only the Fulltone FPS-1 because it is regulated and the optimum tones in this pedal are achieved with exactly 9.0 volts…fresh batteries are often 9.5+volts and the flanging sounds may be affected."

[emphasis added]

[RCM78]

thank you...