Sorry Squeak,

The keyboard's power pack (adapter) for the psr-2000 is a 16-volt, direct current power pack--not a standard 12-volt DC power pack. Not only would it fry your LT, but additionally, it couldn't tollerate the additional drain if it were the correct voltage. When Yamaha built the 2000 it used a higher voltage adapter, probably so they could pump a few more watts out of the built-in amp and make it sound a little better. The guy who's sticking you for $70 for the adapter is really putting it to you. I bought a spare adapter for the 2000 and it didn't cost anywhere near that much.

As for using the same power adapter for both instruments, this would really be dumb, even if they had the same voltage output. The two should always be isolated from each other to prevent similtaneous failures and overloads.

Cheers,

Gary