Why a 1 A pedal power supply can’t power a 750 mA practice amplifier?



Asked by: Dean Saric

Does mA matter for pedals?





Your power supply must meet or exceed the pedal’s amperage requirement, usually measured in milliamps (mA). Not doing so could cause irregular performance or even damage! A milliamp meter is useful to view the exact amperage draw of a pedal. This can prove important when configuring and assembling your pedalboard.

How much power does a pedal need?

Modern digital pedals – like Strymon- or Source Audio-effects – generally need between 200 and 300 mA. Eventide-effects tend to be quite power-hungry, needing currents between 400 and 500 mA. More than 500 mA are usually only required by pro-grade multi-effects or some pedal-sized preamps.

What pedals can share power?

So it's like it goes into one tap. On the power supply. And then it spreads out to two different connectors on the end. And what I'll do is I'll you know plug in the pedals.

Do milliamps matter?

The milliamp rating of a power supply is a measure of how much it can supply. The milliamp rating of a pedal is how much it uses. All that matters is supply exceeds demand. The 230 vs 220V rating probably means nothing.

Is 100mA enough for guitar pedals?





Remember that the power supply you use should provide at least the same amount of current as the pedal draws. So if your pedal has 100mA as the current draw, your power supply must provide at least 100mA. It’s perfectly fine if your power supply has a higher current written on it.

How many milliamps do pedals use?

Current is typically notated in milliamps (mA), and most standard pedals require less than 100 mA. Digital pedals often require a much higher current to operate correctly, generally 200 mA to 1000 mA.

Can I use 500mA instead of 100mA?

For example, putting a 500mA pedal on a 100mA power tap would cause it to act erratically and probably shut down — it might even damage the pedal. Conversely, sending more milliamps than needed to a pedal is fine.

Do I need power supply for one pedal?

Most pedals require 9v DC power and have a very low current requirement but pedals to watch out for include powerful digital pedals like the Strymon or Eventide pedals.

How do I choose a pedal power supply?

Make sure to always use the correct voltage that a manufacturer states that the pedal should run on. So for example don't connect a 12 volt power supply to a 9 volt pedal.



Can I use a higher MA power supply?

No, amps do not have to match, but the power supply or charger must be able to supply enough amps as required by the device being powered or charged. In practical terms, that means the amperage rating of a power supply or charger must match or exceed that required by the device it is connected to.

What happens if amperage is too low?

If you get a charger with amperage less than your original power supply, you risk overheating your charger, burning it and in many case your device will stop functioning and/or charging.

Is it OK to use higher amp adapter?

Yes, sure. If the connector is the same and the voltage is 12V. The ampere value of the new power adapter should be 2A or greater.



Can I use any 9V adapter for guitar pedal?

When a pedal says “9 – 18V”, it means it can accept voltages anywhere within that range. That means you can use a 9V power supply, a 12V supply, or an 18V supply without any problems.

What power supply do Boss pedals use?

BOSS PSA-120S Power Supply

BOSS PSA-120S Power Supply



The PSA series is the recommended power supply for products including all new BOSS compact and Twin pedals, multi-effects and more.

How many watts is a guitar pedal?

For example, your guitar pedal requires 9v. Your guitar head produces 100w while the PA speaker it runs into has an 8Ω input. If you mismatch certain equipment, it could have a detrimental effect on tone and even damage your precious rig.



How loud of an amp do you need?

The Quick Answer. For home use your amp should be around 20W. For most gigs and live performances in venues that hold around 100 people, you should have either a 20W tube amp, or a 40W solid state amp if you’re playing without a band.

Is 100 watt amp too loud?

100 watts solid state = The potential to be rather loud, but there’s always the volume knob. Solid states don’t need to be cranked up to sound their best. In fact, many would say the louder you turn one up, the worse it sounds. 100 watts tube = Get ready for the cops to show up!

Is higher watt amp better?

More watts is better, all things considered for dynamic headroom, but an expensive low wattage amplifier may be superior to a AV receiver’s high wattage + high noise/distortion. For a given budget, Lower wattage amp may be cleaner at lower powers. Most solid state amps are cleanest right before clipping.