Clive, thanks for the clarification on the fuse specification. Mine was marked LF T H1A 250VP. LF is The manufacture’s logo - Littelfuse, not F for Fast. T is slow blow. H is ceramic. Regardless, they failed quickly.The K50 is supplied with 2 x 2 amp fast blow fuses or 2 x 1 amp slow blow depending on country.
While on demo the K30 blew one fuse of the two.
Hope that helps.
Ceramic type sound better IMO if your purchasing spares.
My file transfer process and power cord trials required more than usual power cycles. This unit does not like to be abruptly disconnected from power. The manual warns against this.
I also learned that the K50 sound responds significantly to power cord changes. Can’t skimp here.
From the Head Fi forum, I realize you’ve had your K50 longer than most. How long do you think it took to break in and sound it’s best?