Which No Drill 9V Adapter Do You Need for Your MXR Pedal? A Quick ID Guide
Posted by Andrew Backover on
MXR pedals are iconic — but powering them correctly means knowing exactly which vintage or reissue version you have. Here's how to identify your pedal and find the right no-drill, no-battery adapter for it.
Phase 100 (Block or Script Logo)
If you have a vintage MXR Phase 100 — whether it's a block logo or script logo version — you're in luck. One adapter covers both:
👉 PowerPlay MXR Vintage Phase 100 No Drill 9V Battery Pedal Adapter for Block and Script Logo
No drilling, no batteries, no guesswork. It fits both versions.
Small Case Pedals — It's All About the Backplate
For vintage MXR small case pedals, the key is flipping the pedal over and checking the interior of the backplate. You'll find a part number stamped there that tells you exactly which adapter you need.
Backplate marked 101-2004-1
(Bud Box case or MXR Innovations script logo case)
If your pedal lives in a Bud Box enclosure or an MXR Innovations script logo case with a backplate marked 101-2004-1, this is your adapter:
👉 PowerPlay MXR 1970s Script Logo Bud Box & MXR Case MXR 101-2004-1 No Drill 9V Battery Adapter
Backplate marked 101-2004-2
(Vintage block or script logo small case)
If your small case pedal — block or script logo — has a backplate marked 101-2004-2, you need this one:
Backplate marked 101-2004
(Vintage block logo small case — later production)
If your vintage block logo small case pedal has a backplate marked 101-2004 (no suffix), this is a later production variant. The case markings differ, but the adapter is the same fit:
👉 PowerPlay MXR Vintage Late 1970s Block and Script Logo No Drill 9V Battery Adapter
MXR CSP026 ‘74 Vintage Phase 90 Reissue (Script Logo)
The MXR CSP026 ‘74 Vintage Phase 90 is a modern reissue that stays true to the original — including running on a battery with no standard DC power jack. The good news: there’s a PowerPlay adapter for that too.
👉 PowerPlay MXR ‘74 Vintage Phase 90 (CSP026) Script Logo Reissue No Drill 9V Battery Adapter
No drilling, no batteries, no modifications. Just plug in and play.
Still Not Sure?
Check the interior of your pedal's backplate for the part number — that's the most reliable way to identify which version you have. If you're still unsure, feel free to reach out and we'll help you find the right fit.