Teebs

Compared to my old Elacins, the ACS definitily reduce Bass frequencies more than others, so not quite the flat attenuation I was expecting. Also, the filters can pop out when removing the plugs from your ears. I used a tiny smidge of superglue to avoid any mishap, overall, they do the job and I'm happy.
BTW, you can get these from the Musicians Union for £30 a set (members) and £40 a set for none members.......

mart3442, how do you get them for £40 as a none member? I have a pair but paid quite a bit more and thought they were worth every penny, so for £40 a spare pair could be invaluable!

Here you go:
https://www.musicianshearingservices.co.uk/what-we-do/musicans-hearing-health-scheme/