I detached the rear grill of my parents 901 Series VI. Fortunately, the foam surrounds look fine.
The drivers however look different from what I have seen on the internet. For series V or VI, the darker blue area was big.
The small darker blue area as in my parents 901 VI can be seen on the earlier series 901 pictures on the internet.
Do my parents have counterfeit 901 Series VI?
Is 901WB luxury version of Series VI?
In this video, the darker blue areas are small as in my parents' 901 Series VI: 901 WestBorough with small dark blue area
Were there both types of Series VI drivers? One with small dark blue area, and the other with larger dark blue area?
@skyfly, I can't speak with any authority on this, but I've only encountered cones with the larger darkened area.
As far as the WestBorough designation, I'm not familiar with that either. The only alternate trim package I've see is the LifeStyle trim, that had the amplifier and EQ built into the stands...and I think those were from Series VI.