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

Showing 4 responses by nonoise

Break in is real. Trust your ears. As for manufacturer claims, I've heard from enough that it can take a couple hundred hours for a component, wire, or even just a chip to break in.

The actual changes I've heard were not so subtle, but across the board incremental (not the mathematically small type) so as to make me stop and take notice and appreciate.

It was never a big deal for me as I've witnessed this all through my being involved in this hobby.

As for my ears growing accustomed to the device at hand. Phooeey. Something that was bad to begin with, and broke in through time, still sounded bad and just had to go to the wayside.

Additionally, I've grown to accept something more dynamic, or detailed, or organic sounding that I didn't have before but that is not the same as getting used to something vs. it breaking in. One is a different presentation that would be audibly noticed by practically anyone and the other is something maturing, blooming or opening up as time passes. One is quite distinct from the other.

All the best,
Nonoise
When I've heard a change due to break in, not swapping, it wasn't subtle and it wasn't huge. This was not black and white, big or small, dramatic or ordinary.

My system can easily discern a cable change, a CD mat insertion, a change of footers, IC or SP or PC swap, a tube swap (when I used tubes). Some of those changes were big, some small, but they all had one thing in common. One area in particular stood out at first, only to reveal more once the initial impact wore off.

It took different manner of music to bring out the more subtle improvements as one type of music, let alone one song, or one part played over and over, can, in no way, help to ascertain the benefits. Obviously, one song or a part of it, can not convey the magnitude of improvement since that particular piece only covers a mere, few facets of the overall performance that can manifest itself on ones system. It will hit big time at first, then slowly reveal more of itself over time and with different music.

The changes I've heard during break in usually take me by surprise. I'm not expecting it, it just happens. My brain is in its usual auto mode when I hear the difference. It's when I'm listening for listenings sake. Nothing scientific here. This is with recordings I'm very familiar with. It's like I'm being tapped on the shoulder (ear). Subtle, yes, but noticeable.

That's when I focus my attention. That's when I break out other familiar recordings to see what else parallels what I'm hearing, or compliments with other areas of improvement. This is usually followed by one or two more levels of improvement, over time, and then no more.

It's something I've come to expect but not anticipate. One allows the natural event, the other forces an outcome that can delude. I think that is why double blind tests aren't valid due to the very nature of their being: they force anticipation, instead of allowing something natural, which can seriously skewer a test subjects ability to judge. With their sanity, prestige, and reputation on line, all manner of perception can be tainted.

The same can be said for the well intentioned performing their own DB tests. Being of same mind, or at the very least, friendly and of a peer, they can negatively affect the results due to the very nature of their clique.

All the best,
Nonoise
Mapman, I couldn't stop laughing at that one.
Aren't the Yankees damned anyway?
Thanks.

Al, I understand the other variables you mention but if the ones you list were the ones responsible, then the improvement wouldn't stick around as long as it has. The improvement would come and go depending on time, weather and what have you. What I hear is constant. Consistent.

As for my anticipating in other recordings what I hear in the first one that I hear an improvement in, it has never been of the same amount or degree due to the different quality levels of the recording and pressing. I'll even go to the trouble of bearing through some mediocre recordings to see if they benefit from the burn in improvement and most of the time, they don't. They're still bad.

It takes a really good recording that I'm familiar with and others of that ilk when it comes to evaluating and appreciating the improvements.

For the life of me, in all the years I've been listening, I can't understand why some people can't hear what I hear while others do. I'm glad I do and feel sorry for those who don't (please understand that I'm not condescending).

As for a methodology that would, or could, ascertain break in or burn in of a cap, wire, chip, etc. I don't see how it could be reliably done. Everyone would have to be present when it happens. And when would it happen? And would everyone have the hearing acuity to discern it? Would the system be of a revealing enough nature to demonstrate it? It wouldn't be repeatable as once it's burnt in, it wouldn't happen again. Everyone would have to be imminently familiar with all the recordings as one would not suffice. It would be too onerous a task.

I feel it would have to be in a relaxed setting that one is intimately familiar with, with recordings that one is intimately familiar with, with no time constraints, and no anticipation involved. The very nature of burn in would dictate this approach.

As for validity, I hate to sound like a politician, but trust me.

As for veracity, see above :-)

All the best,
Nonoise