Pug what source were you using? If it was the phono input then yes it could / probably would sound different. As Sean suggests, this is a phono stage loading option & would not affect any line level inputs. Look again to see if there is another switch for cartridge loading resistance. You might see values of 47k-Ohm (standard value) & then some much lower values - 100 Ohm, 50 Ohm etc. If you use a moving magnet cartridge then the likely recommended termination is 47k. For moving coils, try the lower values & determine which sound that you most prefer. Experiment with different combo's of capacitance & resistance too.
Capacitance ?
I am currently using a vintage Adcom 555 pre-amp in a simple stereo set-up. On the rear of the pre there is a switch with three settings : Capacitance
55 pf
175 pf
235 pf
What are these settings for? Yesterday I set the switch to 235 pf from 55 pf where it had been set for almost a year unnoticed. And, it may be my imagination...as it sometimes is with the 'audio' senses , but it really seemed as if the sound opened up a bit when I moved that switch to the 235 pf position. Somebody please help me understand.
55 pf
175 pf
235 pf
What are these settings for? Yesterday I set the switch to 235 pf from 55 pf where it had been set for almost a year unnoticed. And, it may be my imagination...as it sometimes is with the 'audio' senses , but it really seemed as if the sound opened up a bit when I moved that switch to the 235 pf position. Somebody please help me understand.