In the good old days preamps would short all the inputs that were not selected. The rotary selector switch had an additional deck to do this. Many preamps, even cheap ones like Heathkit, also had a level adjustment for each input so you could change sources without abrupt change of volume. Also, Loudness control, Balance control, scratch filters, tone controls...did I forget anything?
unused inputs/outputs - safe to short?
Thinking of trying some of the rca caps now widely available - I notice opinion seems to be divided as to whether it is safe to use the caps with a "male" RCA section.
Undoubtedly it is NOT safe to "short" an RCA output.
But shorting an unused input should neither be here nor there - it should technically quieten the "crosstalk" between inputs, but surely could not cause any damage to a preamp?
Undoubtedly it is NOT safe to "short" an RCA output.
But shorting an unused input should neither be here nor there - it should technically quieten the "crosstalk" between inputs, but surely could not cause any damage to a preamp?