Fascinating to read about which filter people prefer and why; we all hear different, looking first for deep bass, pure treble, transients, detail, hating other aspects like sharp treble, boombass, etc. etc. I'm convinced even two people loving the same music and listening to the same hardware will hear the same; one of them f.i. bobs his head on the rhythm, the other is enjoying the lovely tonal qualities of the singer, another loves the beauty of the melody fore all...
Did some more experimenting and I'm back now to filter 5; it gives more dynamics, better stereo sound stage and details then filter 2 and to my ears the purest treble of all filters; in return filter 2 gives a rounded off sound that can be pleasant with the voice more in the foreground, but with some grain.
Compared to my former Audio-GD REF5 the Rega is on most accounts better, and certainly more enjoyable (the only thing that really really counts, I buy this things for my pleasure) but the Audio-GD was much clearer then the Rega, which seems to have a veil, more background noise.
I'm suspecting using the supplied lead, Khollister clearly stated it makes a big difference in his system and I remember my Apollo suddenly sounding a lot cleaner after I installed the vd Hul Mainsserver, a 'filtering' power cord, that certainly made a difference. Perhaps I'll buy one again, I'll experiment some more after I receive my C5-IEC adapter; I wish Rega would have gone IEC in the first place, slightly chancing the board or cage so that it would fit, can't be that much real estate.
You're talking about redbook here right? What about for hi-res, which filter do you prefer?
Interesting that you find the Rega veiled, which interface are you using on it?