Nice review Twister6. Although I don`t agree with some things about ED9 sound impressions (not so important and might come from source difference), overall good review.
ED9 (gold) has a more balanced sound with an enhanced low end.
Sorry that I disagree but with gold filters ED9 is rather V-shaped sound signature than balanced. Personally wouldn`t call it balanced.
Quote:
with gold filter ED9 and ATE have a similar soundstage.
- ATE vs Pistons 2 (w/filter mod): ...while treble is similar, and so does soundstage.
Some here have mentioned ATE soundstage being larger or same as ED9 and I definitely find ED9 soundstage noticeably larger in every direction than P2, even with gold filters - just makes me thinking about Your soundstage comparison.
Not trying to make Your review incorrect, just some things I noticed and our hearing/source gear is different and impressions subjective.
I really recommend You to try brass filters with some foam inside
When I will receive my ATE, I will try to make my own short "review" & findings about ATE vs. ED9 vs. Piston2.