How much does volume matter when breaking in amps and cables?

Geoffkait -  "Use blankets or jeans over speakers to mute the sound"

Good grief are you fat or what?

Buy a  good breakin cd that uses a lot of sweep signals like the purist audio, or anther we’ll know CDs just play. On repeat or burn to your hard drive I have done this many times cut runin time 
by at least a 1/3 rd also shut off for a 1/2  at least 1-2 x a day 
for it discharges the. Capacitors  then you reenergige them 
it help with cap breakin . Being around audio almost 40 years 
have got a lot of good tips through electronic tech friends.

They’re not fat! They’re chunky. 

Volume is required to obtain sufficiently high voltage and current. Otherwise cables never break in. Duh!

I would have figured since cables need breaking in (plus, I've heard the rca/xlr connectors on the cables needs to break in as well), that one should "break-in" each input/output that will be used on a pre amp. 

Why would you need to “break in” electronics?  There are no moving parts.  Speakers, yes:  electronics?  I never heard of that!  This is not something you can actually hear---or even measure.

If I hooked up an amp that was broken in to an identical set of speakers and one thst was broken in,  you couldn’t tell the difference.  Heck, at the same volume levels, no one can tell the difference between amps at all.