what you are calling agreement between me and him I don't see at all. I'm not going to watch that video again. I could watch another one and tell you what's wro

what you are calling agreement between me and him I don't see at all. I'm not going to watch that video again. I could watch another one and tell you what's wrong with that one, that would be more interesting. I know the field of loudspeakers/acoustics very well, what I've said so far and will say now is all off the top of my head, and it's unlikely that it's in his head at all. We're not going to research a number like 5% more efficient because that's a complete waste of time, let me explain. "We" measure loudness of sound on a decibel scale, that is tenths of a Bel, and the Bel scale is a logarithmic scale, more or less because that's how human hearing perception works, I guess because that's how sounds occur in nature (evolution). But what that all translates to is, to be perceived as "twice as loud" requires a 10 decibel increase; that corresponds to an increase of 10 times the power. On a smaller scale, a 3 dB increase requires doubling power. 3dB is perceptible, but minimally so. So for a tiny 3db increase in loudness requiring 2x the power, is anybody interested in an 5% inefficiency increase taking us to needing 2.1? no, nobody is interested in that, they don't make power amplifiers with ".05 times more power!" (maybe I should add, the decibel scale is a comparative scale, not an absolute scale, and the hearing/sound phenomenon is not linear to begin with, so it works best and most intuitively on smaller ranges; to put it a different way, a power amplifer can go from zero (off) to 10 Watts, 100 Watts, 1000 Watts, but there is no "log of 0") now, as to the comparison of tuned ported/bass reflex compared to acoustic suspension (which is what sealed box refers to): acoustic suspension is NOTORIOUSLY ineffient; it is also notoriously good sounding, and in a compact amount of space like an apartment living room the inefficient power is not important to achieving high sound volumes to create a symphony listening experience. But that is not true of infinite baffles (consider a speaker mounted in a wall), so to lump together infinite baffle with acoustic suspension and call something else 5% more efficient is just plain wrong, but who cares because 5% is nothing on a logarithmic scale. (space efficiency btw is very important in most people's living spaces, and that's where acoustic suspension really wins. I don't know the "efficiency" of acoustic suspension, but people did need to upgrade their power amplifiers, say from 3 watts to 10 watts or to 20. This was in a period of time where electronics were still transistorizing and shrinking so people would notice "hey, I need to buy something, can't keep using the old thing" more than %ages) the goal is not efficiency, it's good sound. bass reflex improves its sound by cancelling the resonant frequency which would be overly loud otherwise. acoustic suspension also tames the resonance, but with an entirely different method, the speaker box is small enough that the compression of the air acts as a spring, where the entire surface of the (paper) cone is supported by the sealed air cushion; the acoustic supsension loudspeaker driver itself does not need a spring in that setup, but it is required for other applications of loudspeakers. he didn't ask himself any questions about the difference between the air cannon and his bass reflex port plus air cannon setup. The frequency of of audio, even very low bass notes would be minimum 20 Hz (that is unrealistically low for most sound systems), and the normal air cannon "balloon snap" is not really comparable. A test he could do would be to keep the speaker cavity filled with smoke and see if a 20 Hz signal blows 20 smoke rings a second: guarantee, it does not, but it might do something interesting. the relatively slow swirl of the smoke ring is a turbulence after effect phenomenon but lets go back to why I wrote my original comment. incels here were making fun of a mexican high school girl and using that video to point out she had accomplished nothing. so to give her the same credit every high school student deserves for their science fair project, I thought I'd point out that this youtube genius could also be made fun of.