…Here’s what B&O did to ameliorate the resonance of the air chamber created under the hard dust cap of their midrange, which is just the same woofer, just modified pole-piece.
The driver with the ventilated magnet is not a midrange!
Both drivers were custom produced to each their specific jobs here.
Personally, I don’t believe much of it before I see some form of documentation.
No, you cannot just listen. – You can measure much more than you can hear.
If you sat down and took some readings, you will see that
the midrange and woofer drivers have quite unique T/S parameters, and you would also see that those parameters go out the door, when you fit rubber surrounds.
It’s a fact. It can be measured and calculated – but most people will actually be able to hear that something is out of normal.
Look at a scope, enlarge waveforms, analyze distortion and its source.
And that comes based on decades of experience with all matters B&O audio
and lots of speaker experiments, measurements and whatnots.
All facts.
And – as a moderator – I have also been weeding out posts that went into audiophoolery.
Beoworld forum is not for buying or selling snake-oil.
Why don’t you give us the readings, so we can see, that what you are doing are in fact improvements?
Martin
