Usually 100 to 300 hours of component break in before you can judge it. That's been my experience. Depending on the parts used in the component, some capacitors take longer than 100 hours. But 100 hours is a base....that's been my experience. Pre-amps are easy to break in. Just leave your cd player or tuner playing 24x7, supplying a signal to the pre(powered on of course). Amplifier does not need to be on. Just source and pre.
FWIW, after changing the caps in my pre-amp, I experienced a pretty good scare for the first 100 hours of playing. But once the caps got their work out, the pre came alive and is a huge improvement over the way it sounded with the stock caps.
Good luck.
FWIW, after changing the caps in my pre-amp, I experienced a pretty good scare for the first 100 hours of playing. But once the caps got their work out, the pre came alive and is a huge improvement over the way it sounded with the stock caps.
Good luck.