Louder horn for Tmax

[Tmax]

Anyone tried to fit a louder horn on the mark 6 Tmax like Denali, Hella, etc.. ?
Not much space in there...

[MrGrumpy]

I always thought the horn on my mk6 Tmax was rubbish - but that maybe cos I normally only hear it when riding, with earplugs in! One time it stopped working - basically gunged up with road crap - took it to my local workshop and they freed it up, and when they tested it there, it was surprisingly loud! A deeper note would be nice though....