Bravo! :clap:"Audibility" is often an act of sheer determination as it applies to subtle variations in the texture of a soundwave.
Just knowing that there might be changes in a soundwave due to a preconception is enough impetus for some listeners to actually hear and be pleased (or bothered by) those changes, whether they are audibly significant or not.
It's probably safe to ignore small variations in the sound caused by cables, break-in, sunspots etc...
These effects are so minor that they are literally swamped by the larger distortions inherent to the speakers and room.
Toeing-in the speakers 5º is probably going to yield more significant audible changes to the sound than break-in will.
Heh, a good question and one that is pretty simple to answer. When your speaker is completely 'broken in', you've worn out the suspension, the coil starts rubbing, etc. Mechanical devices break down, and as we say in NC, it'll just be 'broke'.How come noone hears a change in sound quality for the worse after a driver has been "broken in"?
it just seems a little confusing to me that "ALL" speakers sound better after breakin, yet none sound worse.
The reasons people return speakers has more to do with the environment than the speakers.I wonder if this is why so many people return speakers. I am very new to all of this. I am learning as I go. So thank you for this post.
Absolutely, this is why all my designs use active x-overs. You can simply dial in a new setting for environment changes.Yeah, the more I learn about speaker building, the more I realize that it is impossible to design one speaker that sounds great in every room.
Even just the distance from the wall can influence the crossover design. On wall speakers have a different baffle step compensation circuit than those who are away from the wall. So try picking one design and having two people take it home -- one mounts it on the wall the other puts it on stands. Two completely different experiences.
that's why I like learning about crossover design. As of now, I'm designing for my room. If I go to a bigger room and notice new problems, or have to turn a design into an in-wall, I can simply redesign the crossover (or baffle) to compensate.
I do stand by my break-in statements, though. The giant 15" woofers I am using for my dipole bass measured very different out of the box versus 20 hours of listening. I have one more to break in. I will do the measurements and post results (so far I haven't saved them, since it was just for subwoofers -- i.e. no passive crossover to design). I doubt it's a big difference, but if you designed a crossover based on one expected impedance plot and it changes, well then you end up with a different response.
That should be standard proceedure with all woofers. I break mine in with a 20-25 Hz tone at 8volts for 24 hours. Then I measure the fs to be sure it's at spec before mounting the driver. With mids and tweeters break in prior to mounting isn't as critical.Take the speakers out of the box, sit them on their backs and pump a reasonably low tone through them. Something that makes the speaker really work hard, but don't kill it....by over doing it. (if it's a 10" don't go too low with the sine wave...)
I used to do something simliar (used a sweep from 15-25hz or so), but now I try a different method. High power, short duration with this song. It has a lot of 20-30hz energy.That should be standard proceedure with all woofers. I break mine in with a 20-25 Hz tone at 8volts for 24 hours.
The math is unimportant. The result is major, about the same as how comfortable a pair of leather shoes are after a few months of wearing them compared to when they were new, and for exactly the same reason.I don't know the math behind the electronic side of this...but from an audible standpoint I think that yes it does make a huge difference.