Recommended receiver for HT
Hello cleeds, We all are unable to localize deep bass frequency soundwaves, that is determine where the sound is coming from, that are below about 100 Hz but we're very good at localizing higher frequency soundwaves in the remainder of the audible spectrum, from about 100 to 20,000 Hz. This is the reason there's no such thing as 'true stereo' deep bass and why the bass is summed to mono on frequencies below 100 Hz on all vinyl and cd recordings. If you doubt this, try to find a single vinyl or cd recording that is not summed to mono. This means it's pointless to configure subs in a stereo configuration with one located by the left main speaker and one by the right. However, thanks to psychoacoustics and our remarkable brains, it is possible to create the perception of stereo bass in our systems. Here's how it works: Whether you use 2, 3 or 4 subs, run them in mono and optimize the bass at your listening seat. The bass below 100 Hz won't be able to be localized but there are bass harmonics or overtones of the deep bass fundamental frequency that extend into higher frequencies that are reproduced by the main stereo speakers and can be localized. Our brains are able to associate the fundamental deep bass frequency reproduced by the subs, that are not able to be localized, with the deep bass's higher harmonic frequencies, that extend well beyond 100 Hz, which are reproduced by the main speakers that are able to be localized. This psychoacoustic association allows us to localize the deep bass in the soundstage, for example the kick drum is located in the rear center and the upright bass is located in the front to the left, which would not be otherwise possible without this psychoacoustic association our brain's are capable of. |
noble100 We all are unable to localize deep bass frequency soundwaves, that is determine where the sound is coming from, that are below about 100 Hz .This is mistaken, and with the right system can easily be demonstrated. there's no such thing as 'true stereo' deep bass and why the bass is summed to mono on frequencies below 100 Hz on all vinyl and cd recordings.Bass below 100hZ is not summed to mono on all recordings. Not even close. And when it is summed for LP pressings, it's not because " there's no such thing as 'true stereo' deep bass." If you doubt this, try to find a single vinyl or cd recording that is not summed to mono.Done. |
I realized with a bit more afterthought that I had setup the subs incorrectly by using two Velodyne SMS-1 bass managers. The outputs from the preamp need go through a single SMS-1 so it can provide acoustic room correction for the total sub configuration. I don't have a stake in the debate about whether stereo is perceived below 100 Hz. I was concerned about differences in level between the two channels, a concern probably not well founded. db |
cleeds: "noble100 We all are unable to localize deep bass frequency soundwaves, that is determine where the sound is coming from, that are below about 100 Hz .This is mistaken, and with the right system can easily be demonstrated. there's no such thing as 'true stereo' deep bass and why the bass is summed to mono on frequencies below 100 Hz on all vinyl and cd recordings.Bass below 100hZ is not summed to mono on all recordings. Not even close. And when it is summed for LP pressings, it's not because " there's no such thing as 'true stereo' deep bass." If you doubt this, try to find a single vinyl or cd recording that is not summed to mono.Done." cleeds, Done? What have you done? I can tell you what you haven't done: 1. You've failed to provide any evidence supporting your claim that humans are able to localize deep bass frequency soundwaves, that is determine where the sound is coming from, that are below about 80-100 Hz. Your claim is in direct conflict with the scientific research results on this exact topic. Here's a link to one of many examples: https://www.audiocheck.net/audiotests_basslocalization.php 2. You failed to reference or list any information supporting your claim that, with the right system, it can easily be demonstrated that bass below about 80-100 Hz can be localized. 3. You failed to provide any evidence to support your claim that "Bass below 100hZ is not summed to mono on all recordings. Not even close. And when it is summed for LP pressings, it's not because " there's no such thing as 'true stereo' deep bass." 4. You failed to name a single vinyl or cd recording that does not have the bass summed to mono below about 80-100 Hz. However, that didn't prevent you from claiming you did on your previous post, here's a quote from your previous post listing a quote from me on a previous post directed to you followed by your odd reply : "noble100:If you doubt this, try to find a single vinyl or cd recording that is not summed to mono.Done." Actually, I fail to see any purpose in your last post on this thread. If it was meant as a rebuttal to my previous post, it's a very poor rebuttal. Apparently, you're still not able to name a single vinyl or cd recording that does not have the bass summed to mono below about 80-100 Hz, I'm only asking for a single example, any example. If you can't, it definitely makes your claim that true stereo deep bass exists completely meaningless. Even if your false claim was true and your system could playback true stereo deep bass, you'd have no true stereo deep bass recordings to play on your system and, therefore, true stereo bass, for all practical purposes, would not exist for you or anyone else whose system was also capable of playback of stereo deep bass. Based on the above facts, I suggest it makes no sense to create one's audio system, or advise anyone else to create an audio system, that includes subs positioned and configured for stereo deep bass playback. It makes much more sense to position and configure any subs in one's system for mono deep bass playback so that playback of existing recordings, that contain exclusively summed mono bass below about 80-100 Hz, are also optimized for mono deep bass performance. Tim |
