posted
i posted this in GENERAL but not getting much of a response... what im wondering is, can you play say 20hz, or any freq, get the cabin pressurized, then ahve another sub or the same sub just quickly play your peak note, and thus reinforce the pressure already built up in the car and maybe hit higher numbers?
posted
Its an interesting idea.. I don't know if there would be any realizable advantages of it.. Plus, you have to use one single source material for your runs in most competition formats..
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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posted
you cvould create a track with left channel running one sub at 20hz and then like 2 seconds into that the rite channel blasts 58hz to your other sub...
the thing is.. how would 2 differnt speakers (same ohm load) in stereo to an amp, how would the amp react if the 20hz sub (lower freq draws more power correct? ..to an extent) how would the amp handle this ? you think it woudl at all? one channel getting 20hz other getting 58?
posted
The amp would be fine. For single test tones, it pretty much puts out the same power no matter what the tone. The amp gets signals on different channels on a regular basis.
Adam
------------------ System: Undecided, as usual... (__I__) HAIL CARTMAN!
posted
Well, its possible.. The amp sums all output to a single voltage per channel anyway.
However, you're getting air to move, and then you're attempting to move it again.. Its sorta like that old army punishment where everybody jogs in one direction, and one guy jogs AROUND everybody else.. He's doing more work, but not necessarily getting any farther than anyone else is. The situation is analagous because the speakers are imparting some sound energy into the air, and then you're adding sound energy at a different frequency into the same air.. There isn't any telling how constructive or destructive the interference between the two energies will be, but you can safely say that two speakers playing 50hz will be louder than one speaker playing 20hz and the other playing 50hz OR both playing 20hz.
ShadowStar
ShadowStar
------------------ Still looking for that CHEAP Thunderdome
Got Ears? Get Oz!
You can't build a reputation for what you're GOING to do.. But you can build one for TALKING about it!
-Eclipse-Rockford Fosgate-Oz Audio-Precision Power Inc.-AudioControl-Stinger-Tsunami-Clifford
It's all about knowledge, love and respect.
[This message has been edited by ShadowStar (edited 06-14-2001).]
Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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posted
So basically here is what I'd do, although it might go against Wayne's rules: [Pressurizing the cabin is deemed illegal, but if it's done creatively by the audio componets themselvles, you could get away with it for one season]
Start up SoundForge (or Cooledit, etc), Create a stereo track where the left channel plays a sine of x Hz, probably around 20 or whatever your big subs and amps can muster. On the right channel you play y Hz where y is 60 or 80Hz. Now subtract from the right channel the waves that are present when the left channel is negative (rarefaction), and make it silent. Now in theory you have some subs playing y when the cabin is presurized by the many subs playing x. You will need many subs playing x, as well as a small sealed cabin to actually create pressure.
The pressure is a small increase, and this is strictly an experiement in theory. If you can't figure out the rest of the details of the wiring, you would benefit much more by seeking elsewhere for increases in SPL.
Only one who bursts with Enthusiasm do I instruct; Only one who bubbles with Excitement do I enlighten. If I hold up one corner And you do not come back To me with the other three, I do not continue the lesson.
-- Confucious
[This message has been edited by Phy6 (edited 06-15-2001).]
Posts: 192 | From: Fort Washington MD 20744 | Registered: Jun 2000
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posted
To answer your question about playing two frequencies at the same time, the answer is no. Two different frequencies don’t add spl to each other. When you are on the meter they will show up as x spl at 20hz and y spl at 50hz. The results are displayed on a spectrum analyzer as a function of frequency vs spl.
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Posts: 1259 | From: Fullerton. CA ,USA | Registered: Oct 1999
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