Recent content by nwavguy

In the name of science I just put my ultra valuable very high-end Sennheiser HD 201s to the test on my arbitrary wave form generator which can do a single cycle "burst" of a sine wave at any frequency down to 0.000001 hertz (really!). Sure enough, they bottom out (make ugly noises) far easier as...

Quote: Well it's two against one. Anyone else want to join in? Anyone had headphones that only bottomed out on deep bass notes? There's a reason for that.    

Quote: Thanks Joe, I appreciate your help and confirmation here. I had pretty much given up trying to get my point across. But not to get too far off topic, as I keep saying, all this only matters to point out big fat long duration "thumps", or whatever you want to call the Asgard...

Quote:   The only reason any of this is matters is you were trying to convince people they didn't have to worry about the Asgard transient as it was long and slow. And I still maintain that's not true. A brief fast transient will result in less driver excursion (and also less thermal...

Quote:   This really does matter a lot in how risky the Asgard is to headphones. So, if you would, please answer the following two questions:   Is your original statement that a slower power off transient is less risky to headphones than a faster one correct?   Is your original...

This thread can go on forever in this vein. I've tried to contribute what I can, but I'll just start repeating myself if I go much further.   And, for some here, it probably doesn't matter what I say. Guys like leeperry want to believe way more differences exist than survive even the most...

Quote: For the Asgard yes, I agree. And DC is the most dangerous. It's the combination of the level (around 2 volts) and the long duration (around 250 mS) that makes the Asgard a concern. The typical power on/off transient from other headphone amps (which are usually more of a brief...

There's a lot in leeperry's post that's questionable and subject to the exact involuntary bias I tried to document. And yes, many blind tests have been done in the person's own home, with their own high end system, listening to their own music. Everything is as familiar and consistent as...

Quote: Steve, you make a good point and I'm over simplifying. The excursion is actually influenced by the stiffness of the suspension, the mass of the diaphragm, and the acoustic loading on the diaphragm. At different parts of the frequency spectrum different things dominate the excursion...

Quote: Your wrong. If you look at the math below the calculator box in the link I provided you'll see driver displacement (excursion, travel, Xmax, etc.) is a function of FREQUENCY. For a constant input (voltage), as you lower the frequency, the driver excursion will increase until you...

Quote: I'm only trying to keep this factual. You're the one who keeps making statements that are just flat wrong which is the real obfuscation going on.   Yes, the transient is around 4 hz. And at 4 hz the driver will have massively greater excursion, for the exact same input voltage...

  Quote:   The above is very misleading. DC is dangerous to headphones. Period. AKG has told Shike even about a tenth as much as you measured could be dangerous. The issue is the driver excursion and just because the transient (or whatever you would like to call it) happens slowly and...

Quote:     I agree most SACDs are mastered differently and that accounts for their better sound. And I agree lots of music is over compressed but that's not the CD format's fault. It's been demonstrated over and over as a playback medium 16/44 CD audio really is good enough for music of...

Quote:   I'm not trying to confuse the masses. I'm trying to be clear about potentially misleading statements you have made:    "The driver excursion travel would be the same distance, regardless of the period of the signal applied."   The above is simply not true. That's why I...

Quote: You have the advantage of having the K 701 in front of you and I can only go by what I've seen in the video with the K 702. But the "crinkling" is a lot like wrinkling a piece of paper, or say a mylar balloon--it's very conceivable it might create weak points in the material.  ...