break-in--bane or boon ??


as a reviewer , i often receive equipment which is new and has no playing time.

i have to decide whether to break in the component and if so, how many hours is necessary.

i have often asked manufacturers for guidance.

one cable manufacturer said the cables--digital, analog and power, required no break in. another said 24 hours.

when i reviewed a mcintosh tube preamp, i was told by a technician that no break in was necessary. all i needed to do was leave the preamp on for one hour in order that the tubes were "warmed up"

can someone provide an objective explanation as to the basis for break-in and how to determine how long to break in different components ?

for example, cables comprised of different metals, if they require break in, is there a difference in the requisite time for a given metal, e.g., gold, silver or copper ?

can someone provide an explanation as to what is happening during the break-in process ?

can one devise a mathematical equation to quantify break-in hours, as a function of the parts in a component ?
mrtennis
Mapman wrote,

"BTW I am an active practitioner of tai chi and other martial arts as well as yoga, meditation, and other rituals and practices that are not well understood by many but have proven effective over the years. Some might consider these, whether quantum in nature or not, snake oil as well. Some perhaps even placebos. I understand enough about them and see enough results to believe these things in particular work."

Ah, so you reserve your snake oil and placebo admonitions for things that you haven't any experience with, like fancy fuses and controversial or implausible tweaks. :-)

"Other rituals and practices"? Hmmmm, sounds interesting. Care to elucidate? Share, share.

GK
Thank you for your input, Charles1dad, Ivan_Nosnibor, and Nonoise. Obviously, we're of the same mind.

Mapman, I hope you'd be willing to share a soft drink at my expense at a high-end audio show in either NYC or DC next year.

Douglas_schroeder, "I would not accept hand-wired/made units made over time with possible variances in wiring, solder, caps, tubes, etc. to be close to two mass-produced units."

Douglas_schroeder, "IOW, I don't care if capactitor looks different electronically when used/broken in. I care about if the component will sound different."

Beyond overlooking my point that given the same parts, two DynaKits always converge sonically after break-in, those statements appear contradictory.

At any rate, the implication that a component employing capacitors that measure differently will not sound different flies in the face of the experience of many an audiophile, regardless of whether they believe in break-in. Even cable skeptics I talk with will often concede that if electrical properties of two cables can be differentiated, potential sonic differences could exist, even if put forth with the caveat, "the design one of the cables must be fundamentally flawed."

Regarding your question, my recollection is that the capacitor was not listened to prior to run-in, and the author's opinions on the sonics of the caps in the test followed whatever routine he used. That would fall in line with most of the capacitor write-ups I've found over the years.

Douglas_schroeder, "Don't lump me in with cable skeptics!"

Douglas_schroeder, "I'm not saying that things such as wire, caps, etc. cannot change over time. I am saying that IF they change at all the human typically cannot hear it - it is beneath the human hearing threshold."

Hopefully, you do realize that over the past three decades, the cable skeptics have parroted those very same words.
Geof,

Nothing all that unique or out there really.

Enduring, no doubt:

Judaism

I am a big believer in spirituality and how that affects how one interacts with the world.

Music and how it affects me is just one form of that interaction.

Maybe there is a quantum temple bell in my future.....
BTW, I'm sitting watching the Orioles pound the Yankees.

Can anybody explain that one to me?
I'm sure I'm wrong. I realize now that my feelings towards cable break in stem from my unresolving systems. Ive never enjoyed revealing gear because I don't like to fiddle around that much with gear. I'm more into enjoying music than constantly reworking my system. I'm sure I would notice break in of cables in some circumstances but not with Harbeths and a Rogue Cronus Magnum. I'm looking into solid state and if I go that route maybe I can realize what you're all referring to.