Could you expand on that a little?Impressed as I am with the 8Cs, I suspect that higher performance can be obtained with an even more integrated engineering approach and greater outward simplicity than that reflected in the 8Cs.
Could you expand on that a little?Impressed as I am with the 8Cs, I suspect that higher performance can be obtained with an even more integrated engineering approach and greater outward simplicity than that reflected in the 8Cs.
Sounds like it could cost Amir more than his testing budget even if he wins.
You can win if you are nice about your criticism: https://en.wikipedia.org/wiki/Bose_Corp._v._Consumers_Union_of_United_States,_Inc.
Seriously, a plaintiff can usually choose to litigate in one or many of the legal jurisdictions that this publication appears in. It becomes a 'who has the resources to pursue the matter' issue but then that is how the law usually works, huh.
Yes. Normal dynamic drivers are "sticky" - stiction is the term I believe is used for this, has been discussed on a number of occasions. I learned that very heavy conditioning, by driving the suspension vigorously with the right music, overcomes this to a large degree - how this manifests is that the speakers have "no detail" when cold - only the "big sounds" are heard, the low level information is just not there; after conditioning, play the same track, and a whole new world opens up in terms of hearing fine details in the mix.
I have active speakers and would be interested in your thoughts on this topic. Thank you.
Where does this stiction come from? There are no rubbing parts in a non-broken conventinal driver from which stiction could possibly originate.Yes. Normal dynamic drivers are "sticky" - stiction is the term I believe is used for this, has been discussed on a number of occasions. I learned that very heavy conditioning, by driving the suspension vigorously with the right music, overcomes this to a large degree - how this manifests is that the speakers have "no detail" when cold - only the "big sounds" are heard, the low level information is just not there; after conditioning, play the same track, and a whole new world opens up in terms of hearing fine details in the mix.
Remember a suspension also means the spider, and if you examine the latter they do not have a homogeneous structure, sometimes having a woven characteristic. Any non-uniformity could easily mean non-linearity effects, etc.Where does this stiction come from? There are no rubbing parts in a non-broken conventinal driver from which stiction could possibly originate.
Since pretty well all cone suspensions are polymers their stiffness will be temperature dependant and batch dependant, +/- 10% is good manufacturing.
Stiction? Nah.
Of great importance also is to find out how well a driver behaves at all loudness extremes from very soft to very loud. This is called dynamic linearity or conversely, power compression (at high power). The louder the test signal becomes, the easier it is to measure what might be going wrong. On the other hand, there is almost no way to measure how accurately the cone or diaphragm moves on very small strokes, something the small sounds of music requires. One must discover what prevents motion on tiny signals by studying the principles behind the concept of flexibility, including 'stiction' and 'hysteresis.' Then, the potential for good low-level behavior can be seen by examining the suspension of a raw woofer and tweeter
Remember a suspension also means the spider, and if you examine the latter they do not have a homogenous structure, sometimes having a woven characteristic. Any non-uniformity could easily mean non-linearity effects, etc.
That's the essence of my question, stiction, or limiting friction I understand. Is there any comparable mechanism in a polymer suspension? I'm not asking about non-linearity, more is there a minimum force required to start a cone moving at all? I've never seen any scientific papers on this.Stiction is caused by rubbing. It causes the moving parts of a dynamic system not to necessarily always return to the same static position due to the point where the returning force of the spring is no longer greater than the friction force doesn't always happen at the same point.
That's the essence of my question, stiction, or limiting friction I understand. Is there any comparable mechanism in a polymer suspension? I'm not asking about non-linearity, more is there a minimum force required to start a cone moving at all? I've never seen any scientific papers on this.
S
I noted that speakers using conventional drivers always altered over time, depending upon what source material and volumes were used - of course, not so easy to distinguish the precise cause in a system context. A simple expression to describe this is "that one can hear deeper into the mix" - one reason I take no notice of how a rig comes across when it first starts playing; the lack of depth and flatness of sound is not an indicator of potential.As the cone and assembly is a mechanical system there will be stiction. As Ray notes it can be measured.
I think that audiophile overthinking is more of an issue re this characteristic than audible effect on loudspeaker performance. Happy to be proved wrong.
The "surroundless" part is not new. Some years ago I recall a review of a design which had an otherwise conventional cone but the "surround" used the same design - a cylindrical edge in a slot. The slot and surrounding spaces were designed to counter the tendency for air pressure to leak past.
Nor is spiderless new. NEAR has long eschewed a spider for a ferrofluid bath of sorts.
NEAR is now part of Bogen and doing outdoor speakers, but they were a boutique home brand.
I've heard of two new-tech drivers recently that look more interesting to me than this one.
The first is a subwoofer driver from Pioneer that they've termed HVT. The patent is discussed in this month's Voice Coil. To summarize, it's basically a scissor jack with diaphragms on one or two sides.
The only current use I know of is in an inexpensive shallow subwoofer.
The second one is a pulsating column out of Hungary. Here are two patents:
https://patents.justia.com/patent/20140321692
https://patents.justia.com/patent/20140321692
Stiction is a non-proportional non-linearity.Remember a suspension also means the spider, and if you examine the latter they do not have a homogeneous structure, sometimes having a woven characteristic. Any non-uniformity could easily mean non-linearity effects, etc.
This is certainly true. Pretty well all polymers change their mechanical properties with time, temperature and environment, meaning neither their stiffness nor damping will stay constant with age. Older edge solutions like corrugating the paper and doped corrugated fabric will change with use and run in but probably age much more gracefully than foam or rubber.I noted that speakers using conventional drivers always altered over time, depending upon what source material and volumes were used - of course, not so easy to distinguish the precise cause in a system context. A simple expression to describe this is "that one can hear deeper into the mix" - one reason I take no notice of how a rig comes across when it first starts playing; the lack of depth and flatness of sound is not an indicator of potential.