internal choas and TL's

[trusound]

would this be a good thing? or should the air flow through the TL as quickly and efficiently as possible?

and by chreating choas I mean doing the layer technique and making the internal enclosure with random bumps etc..

Discuss.....

[Cal Weldon]

Originally posted by trusound
or should the air flow through the TL as quickly and efficiently as possible?

I think this is the right idea.

[trusound]

so if that is the case... do you thing finishing the inside lets say with fiberglass...smoothing it out and painting to make the inside as slick as glass would be beneficial?

[Moondog55]

Making it smooth would allow the high frequency to bounce around and come out through the vent wouldn't it??

[Cal Weldon]

Originally posted by trusound
so if that is the case... do you thing finishing the inside lets say with fiberglass...smoothing it out and painting to make the inside as slick as glass would be beneficial?

Perhaps if you had done everything else like radiusing the corners first, that could be your last step. Questionable as to its return on your investment.

Originally posted by Moondog55
Making it smooth would allow the high frequency to bounce around and come out through the vent wouldn't it??

Stuffing up to and including aperiodic loading will help control that.

[Scottmoose]

Right. In which case, it shouldn't make any difference anyway.

Depends on what you're trying to achieve. A TL by definition is damped to ~aperiodic levels, with minimal, if any, output from the terminus, the object being to provide the flattest possible impedance -the 'perfect' load for the amplifier. Ergo, it shouldn't make any difference at all, as the damping entirely supresses the back-wave.

However, what people call TLs and what actually are TLs is another matter -many use a hybrid line (like the old IMFs, for e.g.) where you're preserving some of the cabinet 1st mode to prop up the LF while using the damping to supress line harmonics. Even then, I'd be wary about smoothing things too much -the LF couldn't care tuppence about bends as the wavelengths involved are too long. Midrange & HF hate them, but naturally, they're not an issue (or shouldn't be!).

[MJK]

Originally posted by trusound
would this be a good thing? or should the air flow through the TL as quickly and efficiently as possible?

Maybe it is just a wording issue, but there is really no net flow in a TL. There is only air moving back and forth some small amount. I am not sure, but I would guess that fiber in the center of the line would be more effective than surface roughness for damping the air vibrations at resonance.

[Scottmoose]

Should be AFAIK. I line MLTLs / ML QWRs as they're inherently resonant designs; with TLs (as in ~aperiodic TLs) you're way better off with stuffing, rather than fiddling around the boundaries.