The spec says a Max Current of 300mA. I want to use it for BOSS MT-2 pedal which requires 200mA@9V DC. Can this be used?

They've updated the product at least once now, it seems. I have three I've bought from Amazon with 2013 copyright logos on the bottom, that have "Regulated" printed above the large "ADAPTOR" verbiage, have a 300mA rating, and are a larger cube shape and are much heavier. The revised version drops the 'regulated' verbiage on the box front, has a 2018 copyright, has a 500mA rating, is a rectangular shape like in the current Amazon photo as of 2020, and is MUCH lighter in weight. Both have the exact same model number PW-CT-9V, and UPC code 0 19954 95097 2.

I've purchased 3 of the 9volt Planet Wave Adapters for my Fender Mini Twin Reverb Amps. When I plug them in, I only get a humming noise. Troy,txs

That not a question, but I'll turn it into one and try and answer that question that I just wrote. "Why do I get a humming noise when I plug my planet waves adaptor into a mini twin fender amp?"First off, does your mini twin work with a nine volt battery? Check that. If not, then the amp's broken. If yes, continue. I just checked, and the mini twin seems to be center negative, like the adaptor. Still, check to see if your mini-twin power in is expecting a center negative power supply.Perhaps the power supply input jack on the mini twin is broken?Perhaps you've gotten three bad power supplies. Have you checked them with a multimeter?Good Luck.

If I have a splitter, how many pedals max should be plugged into one power supply?

Hey got to your question late, but I agree with AJ Rugged's answer. The Planet waves 9V power adapter is designed for use with one device with a power draw of no more than 300mA. I do not recommend using a splitter for this power adapter, or any single adapter for that matter. Shop around for a power supply that will power the number of devices you will be using safely. Perhaps here on Amazon? Be safe and good luck.

Does this power supply work for my dymo label manager 160? it calls for 9v 2a.

Absolutely not. 2 Amps is 2000 mA, this supply is rated for 500 mA so it can only supply 25% of the current your device needs.

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⚡ Power your performance, never your batteries!

EXTENDED REACH - 72-inch cord gives you freedom to position your gear exactly where you want it.
BUILT TO PERFORM - Crafted with D’Addario’s industry-leading quality for reliable, consistent power.
PLUG PLAY VERSATILITY - Works with NEMA, F, and G plug types for global gigging convenience.
UNINTERRUPTED POWER FLOW - Say goodbye to dead batteries and keep your pedalboard live all gig long.
UNIVERSAL 9 V COMPATIBILITY - Perfectly powers guitar pedals, tip-negative keyboards, and other 9V devices.

The D'Addario PW-CT-9V DC Power Adapter delivers a steady 9V DC output at 500mA with tip-negative polarity, designed to eliminate battery changes for guitar pedals and other 9V devices. Featuring a 72-inch cord and multiple plug options, it ensures reliable, uninterrupted power for musicians worldwide, backed by D’Addario’s two decades of trusted quality.

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Item Weight	50 g
Product Dimensions	12 x 8 x 4 cm; 50 g
Item model number	PW-CT-9V
Color Name	Black
Compatible Devices	AC-DC Converters, Guitar Pedal, Musical Keyboard
Connector Type	Barrel Connector
Number of Strings	4
Material Type	Plastic
Output Wattage	4.5 Watts
Size	1 Pack
Compatible Phone Models	Musical Keyboard, Guitar Pedal
Power Source	Corded Electric
Voltage	9 Volts
Wattage	9 watts

D'Addario Accessories PW-CT-9V DC Power Adapter – Minimize Need to Change Batteries on Pedalboard and Other Devices Requiring 9V – 500mA Max Current – Tip-Negative, Sleeve-Positive Power Supply

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