Hey 'Bugged, you are so right! I've owned this player for three years, and although it's in my bedroom system now, it was my main player for 18 months or so.
I guess I never noticed it because I have had an SACD focus with this unit, and the filters were never mentioned in that context - unlike the SCD-1, where much ink (pixels?) was spilt on the subject.
I put in an SACD and pressed the "Digital Filter" button on the remote and the display said "CD Only". So I put in a CD, and lo and behold, 5 possible settings.
I'm much obliged, and it goes to show you that an old dog can learn new tricks. Perhaps I should have paid attention to the owners manual - jeez, I have the owners manual and the service manual and still wasn't aware of these filters.
Regards,