Read an article about Neat Elite SX speakers and it said "there,s one 32mm hole on the back of the box that,s tuned to around 40Hz", now i can tune guitar but didn,t think it was possible to tune a hole. Can anyone shed some light on this. Thanks john
Tuned Speakers ?????
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By altering the port diameter and tube length - the 'hole' to which you refer - you can make it reinforce specific areas of the speaker's frequency range.
chebby:
johnnyjazz:...i can tune guitar but didn,t think it was possible to tune a hole.
How about a flute?
Think that,s A flat chebby
johnnyjazz:...i can tune guitar but didn,t think it was possible to tune a hole.
How about a flute?
Think that,s A flat chebby
Sorry guys, think i,m a bit thick on this, my understanding on tuning is that when you tune an instrument you alter the pitch of the note, therefore if a hole has not got a note to start with then how can you alter it,s tuning ie pitch. By the way a guitar is standard tuned to 440Hz, is 40Hz not quite low ? I,m so confused
You're not tuning the 'hole'; you're adjusting the size, etc., of the port to tune the apparent frequency response of the speaker.
Andrew Everard:You're not tuning the 'hole'; you're adjusting the size, etc., of the port to tune the frequency response of the speaker.
Mr. E, What about if the spec said 35 hz tune at 3dB but go down to 20 Hz at 15 dB?
thx
Mr. E, What about if the spec said 35 hz tune at 3dB but go down to 20 Hz at 15 dB?
thx
scene
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Not sure I understand the question, but all speakers have diminishing response at the frequency extremes. So if I get what you mean, the at 35Hz the output is 3dB down on the rest of the frequency range, meaning it's there, but with less SPL, and by 20Hz the output is down 15db. The same will happen at the upper end.
Speakers don't have flat response across the frequency range, but obviously the flatter the curve the better.
Speakers don't have flat response across the frequency range, but obviously the flatter the curve the better.
John Duncan
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johnnyjazz:By the way a guitar is standard tuned to 440Hz, is 40Hz not quite low?
Yes it is. 440Hz is a fifth-string A on a standard-tuned guitar, and if you halve the frequency you go down an octave. Ergo, 40Hz is somewhere lower than 3 octaves below that - round about the last E on a piano...
Yes it is. 440Hz is a fifth-string A on a standard-tuned guitar, and if you halve the frequency you go down an octave. Ergo, 40Hz is somewhere lower than 3 octaves below that - round about the last E on a piano...
Andrew Everard:
Not sure I understand the question, but all speakers have diminishing response at the frequency extremes. So if I get what you mean, the at 35Hz the output is 3dB down on the rest of the frequency range, meaning it's there, but with less SPL, and by 20Hz the output is down 15db. The same will happen at the upper end.
Speakers don't have flat response across the frequency range, but obviously the flatter the curve the better.
Thanks, it kinna make sense. Oh and ART Emotion signature have a flat response across the range, the only pair that I known of anyway.
Not sure I understand the question, but all speakers have diminishing response at the frequency extremes. So if I get what you mean, the at 35Hz the output is 3dB down on the rest of the frequency range, meaning it's there, but with less SPL, and by 20Hz the output is down 15db. The same will happen at the upper end.
Speakers don't have flat response across the frequency range, but obviously the flatter the curve the better.
Thanks, it kinna make sense. Oh and ART Emotion signature have a flat response across the range, the only pair that I known of anyway.
JohnDuncan:johnnyjazz:By the way a guitar is standard tuned to 440Hz, is 40Hz not quite low? Yes it is. 440Hz is a fifth-string A on a standard-tuned guitar, and if you halve the frequency you go down an octave. Ergo, 40Hz is somewhere lower than 3 octaves below that - round about the last E on a piano... Or a low B on a five string bass, very low indeed, sounds like you play the guitar john
John Duncan
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John Duncan
Well-known member
- Jan 8, 2008
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I'm the handsome one. I think the photos on there have me playing a Godin, which has been usurped by a Parker Nitefly. But I have a few others...
And no, an archtop would be nice to have but a) it's not really my style and b) I have enough trouble finding the space for the solid bodies I have already (though I do have a rather nice handmade acoustic).
And no, an archtop would be nice to have but a) it's not really my style and b) I have enough trouble finding the space for the solid bodies I have already (though I do have a rather nice handmade acoustic).
Thaiman:Oh and ART Emotion signature have a flat response across the range, the only pair that I known of anyway.
If they do, then they a) are the only speakers in the world that do, and b) probably defy several laws of physics
If they do, then they a) are the only speakers in the world that do, and b) probably defy several laws of physics
JohnDuncan:I'm the handsome one. I think the photos on there have me playing a Godin, which has been usurped by a Parker Nitefly. But I have a few others... And no, an archtop would be nice to have but a) it's not really my style and b) I have enough trouble finding the space for the solid bodies I have already (though I do have a rather nice handmade acoustic). Also if your playing rock at high volumes i think an archtop would feed-back far too much. Every time i,ve played beside saxophones if they play a certain note then my guitar resonates the open A string and just keeps getting louder even if its sitting on its stand
Andrew Everard:
Thaiman:Oh and ART Emotion signature have a flat response across the range, the only pair that I known of anyway.
If they do, then they a) are the only speakers in the world that do, and b) probably defy several laws of physics
I know it is a high claim indeed. fwiw, they sound fabulous...
Thaiman:Oh and ART Emotion signature have a flat response across the range, the only pair that I known of anyway.
If they do, then they a) are the only speakers in the world that do, and b) probably defy several laws of physics
I know it is a high claim indeed. fwiw, they sound fabulous...
johnnyjazz:Sorry guys, think i,m a bit thick on this, my understanding on tuning is that when you tune an instrument you alter the pitch of the note, therefore if a hole has not got a note to start with then how can you alter it,s tuning ie pitch. By the way a guitar is standard tuned to 440Hz, is 40Hz not quite low ? I,m so confused
What you are doing is tuning a resonant cavity, or a mass of air. A quick Google on Helmholtz Resonator will give you more detailed info.
The port tube in a speaker is tuned to resonate at a certain frequency - say 65Hz. This moves the energy around under the frequency response curve. It doesn't extend the bass in absolute terms. A closed box will generally have a more extended bass response. It just allows the designer to move the energy around - within limits.
Two ports tuned to the same frequency (i.e. having the same mass of air) but with different diameters and lengths will have different effects.
The same effect is used to absorb energy in a bass-trap. At a certain frequency the bass-trap resonates rather than the room.
The same principle applies with hollow-bodied guitars. The cavity has a certain resonant frequency. This contributes to the individual sound of an instrument. It also provides the resonance that creates feedback.
What you are doing is tuning a resonant cavity, or a mass of air. A quick Google on Helmholtz Resonator will give you more detailed info.
The port tube in a speaker is tuned to resonate at a certain frequency - say 65Hz. This moves the energy around under the frequency response curve. It doesn't extend the bass in absolute terms. A closed box will generally have a more extended bass response. It just allows the designer to move the energy around - within limits.
Two ports tuned to the same frequency (i.e. having the same mass of air) but with different diameters and lengths will have different effects.
The same effect is used to absorb energy in a bass-trap. At a certain frequency the bass-trap resonates rather than the room.
The same principle applies with hollow-bodied guitars. The cavity has a certain resonant frequency. This contributes to the individual sound of an instrument. It also provides the resonance that creates feedback.
Thaiman:I know it is a high claim indeed.
And from the reviews I've seen where they are measured, only a claim...
And from the reviews I've seen where they are measured, only a claim...
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