What does 300mA mean?

mA stands for milliamps and mAH stands for milli amp hours. So 300mA means 300 milliamperes of current is passing through the circuit whereas 600mAh means 600 milliamps of current passes in one hour. Normally electronics will be rated in mAh rather than just milliamperes.

Can I use a higher mAH adapter?

Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.

Are all 9V power adapters the same?

– Yes, they are likely interchangeable even though voltage is not the same. This is because the voltage difference is within specs, and I am GUESSING you could go even higher or lower in voltage.

Can you use 12V adapter for 9V?

You can’t use a 12V adapter to power a 9V guitar pedal. A pedal that only handles 9V can be destroyed by using a 12V adapter. It’s possible for a power supply to ruin your pedal even if you get the voltage right.

What does “Max” to “300 Ma max” mean on an amp adaptor?

In this example, the addition of “max” to “300 mA max” is particularly confusing. But this is simply the pedal manufacturer’s recommendation for the adaptor’s maximum rated current. It does not mean you should avoid using an adaptor capable of delivering more than 300 mA.

How many 9V outputs are there on a power supply?

The outputs are fully isolated and extremely quiet, and accommodate a variety of voltage and current requirements – two 9V outputs at 100mA, two 9V outputs at 300mA, two 9V outputs at 450mA, two 18V outputs at 250mA and two 6-15V variable voltage outputs that can emulate voltage “sag”.

Why are cheap power adaptors bad for your guitar?

Cheaper general purpose adaptors are often unregulated. This means the voltage will drop as the current draw increases. The voltage could be too high at low current draws. The volatge cheap adaptors deliver is often ‘unfiltered’ which can cause unpleasant noise through our guitar pedals and amplifier.

Is it safe to use an adaptor with a higher current?

A n adaptor with a lower current rating than required may not be able to supply sufficient power for the pedal to operate as intended. But, as we now know, a pedal will only draw as much current as it needs, so any adaptor with a higher current rating than recommended is perfectly safe.