Yamaha NS-690 series midrange units?

[Audiokingman]

I am in need of a midrange for one of my Yamaha NS-690 speakers.
The model# on the back of my midrange says JA-0701A.

Does anyone know if the midranges on the NS-690II and NS-690III are interchangeable with the NS-690 midrange?

They sure look almost exactly the same.
Are there any differences other than the letter at the end of the model # for the midrange?

 

[SuperLead100]

The model# on the back of my midrange says JA-0701A.
Does anyone know if the midranges on the NS-690II and NS-690III are interchangeable with the NS-690 midrange?
They sure look almost exactly the same.
Are there any differences other than the letter at the end of the model # for the midrange?

I'd be inclined to believe they would be the same unit and are Interchangable. However, you may consider asking this question in the Yamaha forum. There are many there who would be able to confirm if they are truly Interchangable.