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A warning to all about HUGE Subwoofers

So I just bought a Velodyne HGS18 yesterday and its amazingly awesome. Enough so that I know that it can crack concrete and after playing with it a while i genuinely have realized this has the potential if unleashed to destroy a house.

I decided to do a test tone to see how it did and at 10HZ this thing will rattle your whole house (I listen to rap amongst other things, I'm no stranger to playing loud bass)and that is with very little volume. Be careful when you look at subs in accordance to your building.

I always thought the subs that had that potential were awesome and amazing which they are (at least this one) However it isnt fun be afraid to turn up your sub for fear of tearing down your walls. It wasnt that bad but it seems that in 2 seconds or less if its going to loud and low it could do some damage. I can only imagine what it would have done my volume was any higher or if i let it go without being next to the volume switch.

On a side note hearing frequencies that low is an amazing improvement and far better than I had anticipated
systembuilder

Showing 2 responses by bifwynne

bifwynne
2,206 posts
 
Interesting post. FWIW, take a look at some of my recent posts relating to my new impedance buffer and also on potential hearing loss. As regards the impedance buffer, I mentioned in part that my sub woofer crosses over to my main speakers at 45-50 Hz. Yet there "seemed" to be very little SPL generated out of the sub, presumably (??)because there's not a lot of input source in the lowest registers. My point here is that if my surmise is correct, then I'm curious about your your source material. Could it be low frequency noise??

As regards, hearing loss, I think the thread is self explanatory. Watch out for excessive SPL for extended periods of time. As I recall, SPL of 115db can cause permanent hearing loss after just 30 seconds!! ETM!
bifwynne
2,206 posts
 
Great post Kurt. Your post and the attached chart corroborate my empirical findings when I hooked up my impedance buffer. I also agree that it is curious what is causing the low frequency SPL in Systembuilder's woofer. As you speculate, maybe its synthesizers???
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