Highc for treble4/16/2023 ![]() Mazda probably have some old senior executive with an interest of some sort, maybe to to have a unique product. NSU (Audi) did the sensible thing (I really loved the Ro80 but I wasn't an experienced car engineer then.). If it was any good lots of people would use it. Open ports - look good when drawn fully open, as they usually are, but at all times other that than around that instant they are a an orifice with sharp edged opening - which is shite for gas flow.Īt the moment of ignition the difference in flame path distance to the nearest chamber wall and to the furthest is massive = shite combustion.īecause the combustion and sealing are poor the pollution and specific fuel consumption are both shite. A complex system with a relatively short life is slightly less shite than the original. Gas sealing, super difficult to achieve because its shape and thermal expansion are incompatible. The fine print says yes, provided it stays in the bass.Ĭlick to expand.In as much as no ICE has no flaws you are slightly correct. The science was right: even gross bass distortion is remarkably difficult to hear. Only then can they know if one distortion mechanism is likely to mask the other. Anyone asking “can we ever hear distortion mechanism x when elsewhere in the signal chain distortion from mechanism y is so much greater” should look at what types of distortion either mechanism can and cannot produce.This explains the limited take-up of this technique. With their limited control bandwidth (200Hz or so), motional feedback (MFB) systems can only improve distortion in the subwoofer frequency range but are powerless against midrange distortion, including IMD.For pure subwoofers, low distortion is optional.The stiffness curve of the suspension of a woofer can be designed purely based on practical requirements of robustness and power handling.The same goes for BL as a function of current or its equivalent, position dependent self-inductance (see AES paper).BL as a function of position is a critical performance specification that should never be left out of a data sheet.Intermodulation measurements are indispensable for evaluating loudspeaker drivers.Similar distortion figures can hide very different manifestations.So what’s the point of low distortion drivers?) (click on the 3rd article from the top from Dec 12th, 2019 with the title Low frequency harmonic distortion is almost inaudible. Here is a nice example with simulations and sound samples of 2 drivers with almost the same harmonic distortion where one exhibits though much higher IMD due to differences in their BL function. is not that useful other than something to chew on when you are bored.Ĭlick to expand.Yes and we must keep in mind that while the harmonic distortion itself might not be hearable, a driver with high such distortion can also have high intermodulation distortion which is especially problematic at midwoofers which play also the psychoacoustically sensitive mids. A blunt distortion metric of IMD/THD, etc. This is why all of my electronics measurements include full spectrum of the distortion so that we can apply psychoacoustics to them. This is to be expected because these traditional methods of distortion are not psychoacoustically aware. ![]() With respect to your IMD comment, here is the paper: Result was that distortion was not a predictor of preference even in that situation. The study involved equalizing four headphone to the same frequency response and then emulating that on a neutral headphone. Olive, Steve Tatarunis, Todd Welti, and Elisabeth McMullin, Listen, Inc., Boston, MA, 02118, USA As I mentioned read the AES paper, "The Correlation Between Distortion Audibility and Listener Preference in Headphones" 022μ F Hovland MusiCap in my Strat, and while it sounds better than the stock green Fender caps, it has no real character and costs about as much as I spend on all of those MojoTone caps combined.Current research doesn't back your point of view. Both sound great, but I use the Dijons on my Hagstrom Swede's tone controls, and Vitamin Ts on the Swede's odd tone-switch (adding one of two extra caps into the circuit, I prefer a. Hard to explain, but it's a matter of taste. If the Dijon sounds warm and smooth a la late '60s/early '70s, the Vitamin T has more grit to it, in the way of late '40s thru the '50s. The Dijons are very smooth sounding, and MojoTone's site describes the Vitamin T as sounding "sponge-y" and I thought, What the hell does that mean? Somehow, it fits the description. I did a lot of A/B comparisons, and there is a difference in sound. ![]() The Vitamin Ts are oil and paper, and the Dijon is based on the yellow Mallory caps. I dug in up to my elbows in capacitors last month working on different circuits on my guitars, and I bought just about one of every value of both the Dijon and Vitamin T caps.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |