Originally Posted by Oliver Deplace
He said the kick is in the low bass, where his RTA shows the highest amplitude (later, he actually specifies, "20-30Hz"). I don't see how he arrived at his conclusion.
Imagine you're looking at an RTA of a person talking, while a ULF system is playing 20-30Hz noise. So, say the RTA shows the 20-30Hz is clearly 20dB above everything else, would you then assume the person's voice resides within that 20-30Hz range?
He grossly narrowed the spectral content of a kick drum, by saying it's 50Hz. He also said that nothing will be coming from the mains. Well, unless he's crossing his subs to his tweeters, that bit is flat-out wrong. Plenty will be coming from the mains.
Thanks for that.
The HTG fellow, in the video, said that people who implement midbass modules are doing it wrong. Granted, it adds pitfalls and is more work, but that doesn't mean he had to throw eveyone under the bus.
I took exception to the way he stated it so matter of factly. People who don't know any better will believe him. Even worse, if the believers are looking for massive kick, that video is likely to send them down the wrong path to 20-30Hz.
Small cabin, close proximity. You get more, for less, in your truck.
Speaking of a small cabin, did someone say "chest slam"?
I think that some of his videos can be helpful, and his intentions are good. But, as I mentioned in post #5
, his methodology in this instance just didn't make sense. He didn't attempt to measure the frequencies where he was feeling the most chest punch, which is a sympathetic resonance of the air-filled chest cavity caused by sudden percussive sounds at the right frequencies.
Instead, he simply took passages where he and others reported feeling chest punch sensations, and noted the frequencies where the SPL was highest. And, that really didn't prove what he thought it did. Not every frequency, regardless of SPL, causes those sensations of sympathetic resonance. Fortunately, there have been a number of blind studies of chest punch, which have concluded that most people feel the sensation between about 50Hz and 100Hz.
As with all human attributes and sensations, there are outliers to that average frequency range, but it is certainly a good starting point for most of us to use. And, we can determine our own peak frequencies by conducting our own chest punch tests if we are really curious. But, we wouldn't be measuring which frequencies exhibit max SPL. We would be monitoring our own physical sensations, at a variety of different frequencies, to see where we feel the most chest impact. Even without blind testing, that experiment should be indicative of a general range, for a particular individual.
It was also clear that he hadn't reached the right conclusion about the use of mid-bass modules, with port tunes in the 40-60Hz range. There is way too much empirical evidence that they can add to the sensation of chest punch. Again, he seems like a generally knowledgeable and sincere person, so I don't want to be too critical. But, he was simply on the wrong track with that particular video.