It is the BMW system, that I installed myself.
And yes it is more than loud enough. Wish I could turn it down a bit. Not that bad, but a bit too loud. Later ULF units may not have these problems. I installed back in 03 or 04
'95 Alpine M3 LTW
'00 Dakar M Roadster
'02 Topaz M3
Red/White SRF #4 (Chassis 561)