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Most Helpful Customer Reviews
250 of 259 found the following review helpful:
 Just a tip Jul 25, 2006
By Samantha Perkins
I've noticed a lot of people here were having a hard time finding the right adapter for their specific keyboards, and I've got a solution. You don't actually need to buy a Casio brand adapter to fit your Casio keyboard (matching model numbers can be tricky online). Here's a fool- proof method for finding the right adapter every time;
On the back or underside of your keyboard, there should be a voltage rating (which looks like a number followed by 'V'. For example, '9V' or '8V') and a milliamp rating (which looks like a larger number followed by 'mA'. For example, '850mA' or '900mA').
With those two numbers, you can find the exact adapter you need. :) For example, my keyboard is rated '9V 850mA', which looks like a bunch of gobbldeygook until you type it into a search engine or show it to a salesperson at any electronics or toy store. Almost all adapters are rated this way and regardless of the manufacturer (i.e. Casio, Yamaha), you'll always get the exact adapter you need when using voltage and milliamp numbers. Just be sure the other end of the adapter is the right fit for your input jack, and you're all set. :) Hope that helps.
18 of 18 found the following review helpful:
 Works but not what I was expecting and paid too much Dec 16, 2009
By firsttimemom
"firstimemom"
I have a very old Casio "Bank Tone" CT-636 portable keyboard. The AC adatpor was lost and I've been using size D batteries for my son to play the keyboard and that was getting expensive. Finally searched online to find a replacement AC adatpor. According to the spec at the back of my CT-636, it says "DC 9V, 4.5W, uses AC Adaptor AD-5". 9V 4.5W translates to 500mA.
I found two such AC adaptor links on Amazon. One says AC Adatpor AD-5. Another says AC Adatpro AD-5MR (9V, 850mA). Since I didn't want to deviate from the spec and the product description for the AD-5 on Amazon included my model (CT-638/CT-636) while the AD-5MR didn't, so I ordered the AD-5 (~$19+shipping) even though it was almost $10 more expensive than the AD-5MR (~$11).
The delivery was super fast. I got the AC adatpor 2 days later. HOWEVER, this AC adaptor shipped is actually the AD-5MR (9V, 850mA)!! I plugged it into my CT-636, yes, it works, but had I known they are going to ship me the AD-5MR anyway, I would've order it $10 cheaper!! So i was not happy about that.
I gave it 4 stars for the fact that it works.
28 of 34 found the following review helpful:
 Wrong adapter pictured for keyboard Feb 05, 2003
By Displeased Mom
As the last reviewer wrote, we also ordered the adapter to go along with the keyboard we ordered and held both items until Christmas. The adapter was not the proper adapter for the keyboard as pictured.
8 of 8 found the following review helpful:
CTK-2100 Mar 02, 2012
By Becky
This adapter definitely works with my CTK-2100. Since it's sometimes hard to determine what adapter works with what keyboard, hope this helps someone.
19 of 23 found the following review helpful:
Wrong Adaptor Dec 27, 2003
By Brian Cooper
I, like the other customers. ordered this adaptor based on the recommendation from the site, and was disappointed when, on Christmas Eve, I realized this was not right for the keyboard we had ordered. This situation was particularly misleading since the adaptor was practically "bundled" for sale with a product for which it is not compatible.
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