BASSic fun

My computer desk doesn't really favour anything more than a 2.1 speaker configuration. So when I wanted to dump my sorry sounding Philips Smart Sound LC 2.1 speaker unit, I searched for another 2.1 speaker that was in the right price-to-performance sweet spot. This time, I didn't want to end up with another LC2.1 sound-alike, which turned out to be cheap both in price and quality. But I am over it now and my brand spanking new Altec Lansing ATP3 is monetarily cheaper and aurally dear.

My pre-shopping research made a strong case for this speaker, and it very much lives up to it's fame. I mean, the bass is always in-your-face with no artifacts at all volumes. Oh yeah, let's talk about the bass. Due to my room's terrain and my desktop's oppulence, the only place to keep my speaker system is on my computer desk. The best place to keep a down-firing sub like mine is against a wall. But placing it on my desk has it's own thrills. Anytime a deep drum sounds, I can feel my desk vibrating as if it were the one that was hit. The effect is spectacular in games and in hiphop music, especially.
AFAIK, subwoofers are pretty much unshielded and so must be kept away from other electronics. But this is the first subwoofer I've had that distorts the monitor's display noticeably with every bass note. The effect is annoying, of course, and I am appraising a suitable location to relocate the sub. The ATP3's specified frequency range is only 45Hz to 18KHz, which was surprising considering the response. So, one day, I set out to find just how the subwoofer does great bass without touching the 18Hz to 43Hz spectrum. I downloaded a few tone generators and quickly liked playing with NCH Tone generator.

Using the tone generator introduced me to an absolutely unexpected and mind-blowing experience with deep bass. It totally changed my appreciation for the speaker as well. After stepping through the numbers, I found the following "sweet spots" in the speaker's response. NB, I didn't test extensively, rather just stepped through at the program' spinbox's granularity.
88.10 Hz
93.34 Hz
117.60 Hz
124.59 Hz

Though not near the infrasonic range, these frequency spots shook the room pretty good. My favourite was the 124ish Hertz. At this frequency, the ATP3 seemingly produces the most bass output. The subwoofer and the mid-range drives started behaving like goddamn leaf-blowers, pumping a continous stream of air. At first I couldn't up the volume above three-fourth at this frequency because there were all sorts of whirring sounds, apparently, coming from all around me. That was the first time I discovered how many loose objects were on my desk and around my room as well. Loose changes and small boxes were the first ones to rain down on my desk from the subwoofer's perch. A stationery holder (full of stationeries) and the subwoofer of my old LC 2.1 system started moving fluently along the desk. The glass windows and a light-weight, free-standing dressing table were the source of the whirring sounds. After securing them down I was able to up the volume still more.
But not completely though as harmonic distorsions become too evident. But even then the effects of the bass was pretty exciting. I brought water filled vessels into my room to observe ripples of varying amplitude with varying frequencies. That was when i noticed something more cool.

I remembered an episode of MythBusters where Adam Savage tested the myth of the Brown Note. The myth says that there is a subsonic frequency between 5 and 10Hz at which any listener supposedly involuntarily loses control of his sphincter. Or, in other words, the hapless audience shat their pants. They found no such note, at least in the three frequencies they tested (IIRC, 5, 7 & 9 Hz). My guess is that an infrasonic laxative note is quite plausible knowing the dangerous effects of the lower hertzes. Different intensities of infrasounds can knock down buildings, liquefy any animal's organs in a second, simulate an earthquake, travel around the world seven times over and can can mess up the mind, all 'without a sound'. I can understand why we can't hear ultra-sonic sounds (our middle-ear is a sort-of low-pass filter), but I always wondered how we can hear 20Hz but not 17 Hz. Maybe, at sub-17Hz, we only "hear" (or, "feel") the individual beats.
Anyways, coming back to the topic, my plan wasn't to inadvertently stain my long johns, however. In the episode, when Adam Savage, surrounded by arrays of subwoofer spitting low hertzes, tried to speak, his voice came out on-and-off, coinciding with the frequency they were working. That was due to the rhythmic compression and rarefaction of his lungs by the massive wall of air being moved by the insane SPL audio drives.

What surprised me was that I was able to do the same thing with my stock ATP3 subwoofer!

It was great fun to talk normally but end up sounding like a robot on a vibrating spaceship. Of course, with only 103dB SPL, the ATP3 isn't the 60 inch subwoofer and definetly not qualified for no SPL competitions. Ergo, I have to stay within about a half a meter of the sub woofer to pull this trick. But the bass's bewitchment burns brighter and compels me to buy a bigger custom woofer unit. I wanted to know how low a frequency a sub can produce (not reproduce, as I believe most audio formats don't store them in the first place) and came upon "the buttkicker". The ultimate way to experience bass is, supposedly, up yours. The device attaches to the bottom of a seat or a couch and transmits bass efficiently through the solid medium directly to the "recipient". I only wish someone would buy this for my birthday or something.

So, try the little sinsoidal experiment and see if you can't experience the primal bass response of your subwoofers too. And, of course, here's an obligatory note: Any damage to your equipment or to you or to your neighour's cat from trying out anything I said, is your own fault. The tool suggested here puts your speaker unit to a sustained high power output mode and hence should not be used for more than a few moment at a time, with the definition of "few moment" being left for your common sense to figure.

Here's a snapshot of my desktop showing the location of the ATP3, if you can find it among the junk, that is :)
Image taken on my father's nokia 6255 (I think).