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Vintage Block Logo MXR Phase 90....neg or pos ground?

C

Chad

New member
Joined
Sep 26, 2001
Messages
168
I'm wanting to get an AC adapter for that pedal, and am wondering if I need to get one with a negative or positive ground.

Thanks!
 
John Catto

John Catto

Active member
Joined
Jul 15, 2001
Messages
3,609
While I don't have one to hand, every MXR effect I've ever seen has been Negative Ground. You'll need to install a DC Jack however, I think or attach the adapter via a battery clip clipped onto the battery clip (make sense ? ;)) Get an adapter which is regulated as well.
 
C

Chad

New member
Joined
Sep 26, 2001
Messages
168
John: Thanks a lot for the info. My Phase 90 is beat/looks like crap. It has a bunch of scratches and it has a script logo bottom plate. I wired it for true bypass a couple years ago. Despite it being somewhat bastardized and beat it sounds great. I was actually thinking about just drilling a hole in the side, putting in a grommet, and running a wire through that. Any ideas of a good negative ground adapter to buy that has a 9-volt battery clip connector?
 
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