Piano World Home Page Forums Our Most Popular Forums Piano Tuner-Technicians Forum Adapter Substitute

So my new keyboard didn't come with an adapter, but I figure that wouldn't be a problem since I do have a lot of spare adapters at home. The problem is I don't know anything about electronics, and I'm not sure which ones are safe to use.

The manual didn't include the specifics, so I looked around and came across two different pages about the (supposedly) same product:

Input: 100-140V AC, 60Hz
Output: 12V DC, 1700 mA

Input: 100-240V, 50/60Hz
Output: 12V, 1.5A

I'm mostly curious if it would be safer to use an adapter with a lower or a higher number. (I've tried researching this, but different people have given different answers and I'm still left confused.)

Well, this is not the correct place to ask, but as it happens, I can tell you that there are several things that you need to get an adapter to work:

1. The proper physical connector.
2. The polarity of the connector.
3. The same voltage.
4. At least the same current rating, or wattage. Watts equal volts times amperes, or voltamperes. In this case, I guess it could be 1.5A which is 1500 mA, or 1.7A which is 1700 mA.

Usually the polarity, voltage and amperage are on a plate on most electric items, along with the serial number.

Your keyboard should have some tiny numbers next to the input indicating the requirements.

Make sure you have the right connector (centre positive or centre negative, there will be a small drawing indicating it in both the converter and the keyboard).

Match the voltage, 12 is 12, not 9 and not 15.

Try to match the amperage as close as possible, if you can't exactly replicate the amperage, go for a *slightly* higher one (the keyboard won't be demanding the converter's full capacity). If you use a converter with lower amperage, it will get hot (not good).

Good luck.

PS: This is the piano technicians forum, most people here works with pianos, not electronic instruments.