The frequency spectra of both an infinitely sharp step and an infinitely narrow pulse contain all frequencies from zero to infinity. According to the time-frequency uncertainty principle, 2pi * delta(f) * delta(t) >= 1, where delta(t) is the width in time (duration) of the pulse or step, and...
Headphones. :cool:
To be serious, deep bass harmonic distortion performance of speakers correlates well with the total area of the bass drivers. The Revel F206 has two 6.5 in (diameter) drivers for a surface area of 2(pi/4)(6.5^2) = 66 in^2, the Revel F328Be has three 8 in drivers =...
I think one of the great things about classical music is it includes so many sizes and types of ensembles you can find pieces suitable for any use or occasion. Pretty much all classical has a wider dynamic range (SPL difference between the loudest and softest passages) than typical pop music...
I've noticed that a current trend in the classical music world is imperiling the living space and maybe the sanity of collectors: releasing "complete editions", all the recordings by a given conductor, artist and/or ensemble on a given label, and enticingly priced in cost per disc. For example...
I don't doubt that, but the total waste of resources from an environmental point of view is due to the sum of actions by industry and consumers - and very concept of "fast fashion" indicates that the industry is selling the idea to consumers "you should replace your clothes more frequently to...
I had to check to remind myself of what that looks like, and I say well worth the price for those who can afford it - especially the "in your face" factor if the owner can arrange for it to be viewed by professional or social rivals. Gives the impression it's going to come to life any moment and...
From a report "Fast Fashion and its Environmental Impact in 2024",
I don't think there are any audiophiles / audio enthusiasts who throw 85% by weight of their existing gear in the trash each year, so we're way ahead of the fashion industry (which is much larger because it appeals to a larger...
I found a good reference on basic physical properties of sound waves, including examples from our shared obsession (audio systems):
"Sound", chapter 17 of "University Physics Volume 1", published online by openstax.org, a division of Rice University, under a Creative Commons license...
The Philips SHP9600 headphones are currently available directly from Amazon, "New, Ships from Amazon.com, Sold by Amazon.com, Customer Service by Amazon.com", which I understand is your preference. But to discover the "true Amazon" option, you need to scroll down the page I listed before, look...
I suggest more reviews of recent, entry level, multi-channel AVRs (typically 7.2 nowadays, less commonly 5.2) would be useful to people getting started with their home audio / theater hobby. There are a fair number of reviews of other types of entry level gear, such as loudspeakers, but not so...
2016 model year or later Denon and Marantz AVRs and AVPs support MultEQ Editor (for Android and iOS) and MultEQ-X (Windows). I think Audyssey did a good job in making their MultiEQ-X app (Nov 2021 +) compatible with 5-year-old hardware ("piggybacking" on the hardware support for the previously...
The three DSP versions internal to AVRs/AVPs, MultEQ, MultEQ XT, and MultEQ XT32, are still used by Denon/Marantz. The following list shows what's in the D/M hardware from the most recent model years.
MultEQ, does NOT support external apps:
Denon AVR-S660H
Marantz NR1510 (slimline)
MultEQ...