i had to turn my 97301 and my ROG 37 down as it was doing the same thing. i do agree with you that it is now to quiet, tho im keeping mine, yes most mine even the AS class 92 on f2 is horns etc same with most other models i have i use Hornby elite so not much of an issue for me, just need to remember on 37s that f2 isnt the horn,
i think Bachmann 66s horns are on f3 and f4 (factory fitted sound)