Which would sound better?

[mashypie]

Yes.

dave

Thank you!

 

[mondogenerator]

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

yep, Dave knows his stuff.however maybe failing to mention one instance where both the OPs plan can be realised.....no ill wait

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

(correct me if im wrong Dave), a 1/2 WL pipe can also be open at BOTH ends.......or rather what im saying is that make the line 1/2 WL long, and leave both ends open, et voila! the only trouble is, the math cant be circumvented; it will still be a 1/4 WL resonator, even if it is 1/2 WL of the tuning Freq.



im pretty sure that right at least.....i seem to rememeber something about both odd and even harmonics being generated as a result, rather than just odds in a pipe open at only one end.

 

[mondogenerator]

IT WOULD APPEAR THAT AS USUAL I AM THE LAST TO THE PARTY

Furthermore, i stated what has already been said, albeit in less eloquent language as Line array. and scott. and Dave.

i shall hang my head in shame.....

 

[planet10]

a 1/2 WL pipe can also be open at BOTH ends.......

Yes. I think B&W Nautilus not B&@% wave canon when i think 1/2 w/l resonantor.

dave

 

[Bob Brines]

a 1/2 WL pipe can also be open at BOTH ends....

Indeed! Port resonance in a BR port is exactly that -- 1/2 wave resonance in a pipe open at both ends.

Bob

 

[mondogenerator]

Yes. I think B&W Nautilus not B&@% wave canon when i think 1/2 w/l resonantor.

dave

hahaha i dont relish the thought of pipe open at both ends either If i had the room id build a 1/2 WL sealed TL, rather than a TQWT; similarly to closed box vs SBB4, im sure the 1/2 WL 'nautilus' type would exhibit much better group delay at LF.

 

[germanach]

hahaha i dont relish the thought of pipe open at both ends either If i had the room id build a 1/2 WL sealed TL, rather than a TQWT; similarly to closed box vs SBB4, im sure the 1/2 WL 'nautilus' type would exhibit much better group delay at LF.

I have drawn a sin(x). One "U" tube with a speaker at one end and nothing in the other. So 1/2 will have constructive output each peak of the wave. But with 1/4 will have maximum output when at the other end is zero and vice- versa. So 1/2 lambda should output 2*output level and 1/4 1*output level. But this is not true, why 1/4 lambda sum the output? Or is just is not destructive?