⚡🔄 9V AC to AC Power Supply
 
(9V AC Output • Barrel Plug • Unregulated)

This adapter delivers 9V of alternating current (AC) directly from the wall to devices that require AC input, not DC. It’s used in select audio gear, telecom systems, and legacy control modules that perform their own internal rectification and voltage regulation.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output: 9V AC (unregulated, 1.5A)
Connector: Barrel plug
Polarity: N/A — AC has no fixed polarity
Common aliases: “9V AC wall wart,” “AC/AC adapter,” “unregulated AC transformer”
 
🖥️ Compatible Devices
🟦 Audio & Musical Equipment
Line 6 POD series (e.g., POD 2.0, POD XT)
Digitech RP and GNX series multi-effects pedals
Yamaha and Alesis drum modules (select models)
Some vintage guitar preamps and rack gear
🟦 Telecom & Control Systems
DSL modems and routers (older models)
X10 home automation controllers
Alarm panels and access control units
HVAC thermostats and relay modules
 
✅ Common Uses
🔌 Powering devices that require AC input, not DC
🧩 Replacing lost or damaged OEM 9V AC adapters
🧪 Feeding internal transformers or bridge rectifiers in legacy gear
🧵 Essential entry for audio techs, telecom engineers, and control system integrators
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔄 Output: 9V AC, unregulated
🔌 Barrel connector
🔁 No polarity — both barrel contacts alternate current
 
⚠️ Things to Watch Out For
❗ Not interchangeable with 9V DC adapters — using DC may damage AC-only devices
🔌 Do not use with devices expecting regulated DC input
🧯 Always confirm “AC IN” label or manual before connecting
📉 Voltage may vary under load — not suitable for sensitive digital electronics without internal regulation
 
🛠️ Quick Tips for Beginners
🧭 Look for “AC IN 9V” or “AC 9V~” on the device label
🔌 Never substitute with a 9V DC adapter — polarity and waveform are incompatible
🧪 Use a multimeter in AC mode to verify output
🧯 Label clearly to avoid confusion with DC supplies in your toolkit
🧵 Essential for gear with internal rectifiers or transformers