new tweeters for RT16's

[1422]

Hi. I'm thinking of upgrading the tweeters in my RT16's to the silk dome models that are in my RTi10's (model RDO-194?). However the RT16's are 8 ohm and the RTi10 are 4 ohm or is the replacement model a 8 ohm?
1422

[F1nut]

The first thing you need to do is CALL Polk and ask them if the tweeters are interchangeable, which I don't believe they are.