Glad you’re liking the ampI think I like the fastroll off filter best. But still experimenting . I looked up about the filters and it seems fast roll off is the default and slow roll of gives a warmer sound by taming the high frequencies. Thing is I love the high frequencies of the 607 speakers so fast roll of is more to my liking
The build quality of this amp is great. Makes a satisfying clunk sound when switching on. Oled display looks nice and the controls feel nice to use. The build quality feels solid and the look of the amp in silver is very sleek.