Which would sound better?

[mashypie]

A driver in a 1/4 wavelength tube or the same driver in its equivalent 1/2 wavelength tube?

Assuming size isn't an issue

Or would there not be much of a difference? I'm guessing that efficiency would be lower in the 1/2 length one...

[mashypie]

Maybe thats a bit of a subjective opinion...

Ok maybe I'm more interested in how they would differ in sound from each other, assuming they would at all

Wold one have more high freq attenuation than the other, would one be more efficient than the other, would one extend lower than the other? etc

[brucegseidner]

Originally Posted by mashypie

A driver in a 1/4 wavelength tube or the same driver in its equivalent 1/2 wavelength tube?

Assuming size isn't an issue

Or would there not be much of a difference? I'm guessing that efficiency would be lower in the 1/2 length one...

I think we had better get an operation or some kind of emergent triage to separate your lady friend avatar from the loudspeaker. With that kind of diffraction grading potential I don't know how one would tell the difference.

[planet10]

1/4 wl pipe will be open at one end, and has the potential to get some bass augmentation,

1/2 wl pipe is closed at both ends, and will essentially have the extention of a sealed box.

dave

[picowallspeaker]

So ,how do bass-bins (scoop) work ?

[planet10]

They are horns.

dave

[mashypie]

Originally Posted by planet10

1/4 wl pipe will be open at one end, and has the potential to get some bass augmentation,

1/2 wl pipe is closed at both ends, and will essentially have the extention of a sealed box.

dave

What if it were open though? ie like an extended TL

I've two drivers that I'm going to try this out with, just wondered if there was any input as to whether it would make that much of a difference

My initial feelings are that it wont, but then something tells me that while the 1/4 may be more efficient, the 1/2 will have more midbass attenuation

I've also got a little theory about some of the original TLs but I dont know if they had a different sound to more recent ones or not...

[planet10]

Originally Posted by mashypie

What if it were open though? ie like an extended TL

If it is open at one end it is a 1/4 w.l resonator. If its length is a 1/2 w/l of the Fs then it is tuned far too low.

dave

[mashypie]

Originally Posted by brucegseidner

I think we had better get an operation or some kind of emergent triage to separate your lady friend avatar from the loudspeaker. With that kind of diffraction grading potential I don't know how one would tell the difference.

Shes actually a special tweeter lens that improves imaging and soundstage, to remove her would be detrimental to the sound, I'm sorry

Originally Posted by planet10

If it is open at one end it is a 1/4 w.l resonator. If its length is a 1/2 w/l of the Fs then it is tuned far too low.

dave

So you're saying there is no real advantage to tuning to 1/2 wl?

I will prob still try my project either way. But I'm thinking some original TLs were tuned in a 1/2wl (or equivalent) enclosure rather than the thought of 1/4 length.

[planet10]

Originally Posted by mashypie

So you're saying there is no real advantage to tuning to 1/2 wl?

Any tuning below Fs decreases bass output.

But I'm thinking some original TLs were tuned in a 1/2wl (or equivalent) enclosure rather than the thought of 1/4 length.

Not that i recall ever seeing.

dave