A:AnswerThat is a very old model. The adapter will probably would work. I suggest contacting Casio Customer Service via email: https://www.casio.com/support/contactus/feedback Or Customer Service at 1-800-706-2534 during regular business hours (currently Monday-Friday 9:00a.m. - 5:00pm EST, Saturday 10:00 a.m. - 8:00 p.m.).
A:AnswerThe MT-46 was first manufactured in 1982. So unfortunately I am not 100% sure what the adapter model is, possible the AD-1. I suggest searching for vintage Casio keyboards adapters. I wish I could be more helpful.
A:AnswerThe CTK-496 is an older keyboard that is no longer being manufactured. The ADE95 is 9.5 volt. I suggest contacting Casio Tech Support at 1-800-435-7732 during regular business hours (currently Monday-Friday 9:00 a.m. - 8:00pm EST for all products, Saturday 10:00 a.m. - 8:00 p.m)