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Posts by impermanente

Great answer, very concise and simple! By any chance do you know roughly in which range of frequency can be the mechanical resonance of a planar magnetic driver like the audeze LCD? As you pointed out since such a driver is like an harmonic oscillator (mass-spring system) then there must be an associated natural frequency (resonance frequency). I was wondering if the resonance was well outside the audible range, being the thin film diaphragm very light. 
I've got a fake one class A from http://igadgetsstore.com/ (Yarkata) in the UK for £120, so stay absolutely away from this website. I have to admit that it is done quite well, but it took me 30 seconds to spot it in terms of materials...fake leather is just rubbish, the real one is so easy to feel. Also the fit is awful and the sound is boomy and harsh, the pad are ways too narrow and rigid. I am trying to ship the cans back but I seriously doubt I will manage to do...
I would like to exchange my Beyerdynamic DT1350 for some Sennheiser Momentum over ear in good conditions. The DT1350 I have are in very good shape, about 2 years old and not used much. Only UK traders please. Please PMme if interested.   Thanks
For Sale my great little headphone amp/dac Epiphany Acoustics EHP-O2D based on the famous DIY project from AwAvGuy    Bought new from Epiphany acoustic in the UK   The unit is about 18 months old and it is in perfect working conditions. There are no scratches and dents.   It comes with a USB cable and UK power supply (220 volts) Shipping costs are included in the price.
This classified is only for trade and you just joined yesterday. No thanks
I 'd like to exchange my Audeze LCD 2 Bamboo and suede for a very good condition Sennheiser HD 800.   I'll add pictures soon (the loaded one is just an example of the type), the LCD2s are about 1 year old and in mint conditions. Complete with plastic travel box and with a self made cable with Furutech jack and Van Damme cable.   PREFERABLY WITHIN UK
HERE FOR SALE MY BEYERDYNAMIC T70P DIRECTLY BOUGHT FROM BEYERDYNAMIC GERMANY (NO SCRATCHES AT ALL OR SIGNS OF WEAR).   I ALSO THROW IN 2 PADS FROM THE AKG K240 (THEY COST ME £20) WHICH PERFECTLY FIT WITH THE T70P IMPROVING THE OVERALL PERFORMANCES (ESPECIALLY THE BASS RESPONSE). HERE SOME REVIEW ABOUT THE...
  thanks Steve,   So you are basically saying that since the resonance of the LCD2 is outside the audible spectrum (it is basically an harmonic oscillator so it must have a resonance frequency) it is useless damping it, one could not hear any ringing (unless one can hear ultrasounds).   Also reading your previous reply to xnor you are also saying that the reason of transient problems in the CSD plots is caused by other resonances of the diphragm in itself especially at...
Ok I see what you mean now, I apologize for my analogies, maybe are a little bit misleading. But when I say that damping works at all frequencies I mean in the transient phase, sharp changes of signal etc.   So for example for the LCD 2 in sequence:   1. I apply a signal to the speaker. 2. The diaphragm moves. 3. I stop the signal (or abrupt change). 4. In an ideal world the diaphragm does not have mass and it is not linked to anything so it would stop or...
"No, it doesn't work at "any frequency." It only works at the resonant frequency."     Please I don't understand this, could you please explain why in your opinion should the damping work only at the resonance frequency? It seems obvious for you but I don't see it.   The electrical damping works all the times the diaphragm moves, the movement in itself generates a current which generates a force opposite to the movement (damping force) this always happens just...
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