Just an FYI.
This is some info that some people do not know.
1.) All Boss pedals, and most other pedals, run off the battery FIRST, before a 9 volt wall adapter.
A dead battery in one pedal can shut down your entire pedal chain.
If the battery dies the pedal will not work even if it is plugged into an adapter.
Always take a battery out when using a 9 volt adapter plugged into the wall.
2). When used with multiple pedals be sure not to under power the pedals with mA. You can't run multiple pedals on a single 9V 300mA adapter.
3). There are quite a few of the early Boss pedals use an ACA-120 power adapter, NOT the PCA-120 power adapter.
I found this on the net.http://www.bossarea.com/boss-df-2-super ... istortion/
The first DF-2s was labeled “Super Distortion & Feedbacker” while the later ones was called “Super Feedbacker & Distortion”. DiMarzio had already registered the name “Super Distortion” so Boss was forced changed the DF-2’s name. The change took place around serial number 500000 (January 1985). Production moved to Taiwan late 1989 and was modified for the PSA adapter from early 1991.Recommended AC Adaptor: ACA Series (black label) or PSA Series (silver label)
So read the back. Double check you are running it correctly.
Just trying to help.