The Value of Research

Im still waiting for links.

Thanks for the link, I have no concerns one way or another. If you can not hear the problems created by those possible standing wave then no one cares.

btw, nice way to start of your position I know one thing, you are not going to sell many speakers with that attitude.

For everyone else this guy wants to sell speakers, he is not here to be a DIYer or someone that wants to share their experience for free. He is using this forum to get more data/opinions only to steal IP and try to make a profit.

I said no thanks!!

That about validates everything I said.


Closed end pipe = Odd harmonics based on quarter-wave length. There are phase anomalies in between the resonances/driver, but that is normal , and has nothing to do with even ordered harmonics as there are none.

His first example clearly states the pipe was setup to have its Fb approximate the drivers raw Fs.

His second example lowers raw Fs an octave below Fp, the end result is the same resonate frequencies.

At no point does he say raw Fs has anything to do with pipe resonances. Only Fp, and as this was about classic TLs Fp is always at raw Fs, or an octave of.

Change the Fp to something that is not a multiple of raw Fs, and you will see that things follow the pipe, not the driver.

Sheesh, get a life and let it go, Villa. As usual, you flunk high school physics. No surprise there. Augsperger, who I respect very much, isn't claiming anything like what you wrote above. And Martin King, who you have so much contempt for, didn't just read one or two of Augsperger's papers; he corresponded with him extensively and got his input when he was writing his software.

What do you think that means? Try some reading comprehension.

You may also want to try it out in the workshop I assume you have. Swap out a driver in one of your TL's with another that has an Fs that isn't a multiple of the Fb, and see what happens.

I can show you plenty of sims, but you will just say they are wrong.

We will be waiting for your proof then.

Why don't you do the simple experiment Soho proposed? We've all done it, why haven't you?

What part of this impulse response is too hard for you to understand?

Unlike you, I've done actual measurements and they match the sims quite well, thank you very much. The only one with his head where the sun don't shine is you. Last I heard, you finally got a mic and some free measurement software? Try using them. Measure more, BS less.

See there is this thing called the real world. All you have to do is do the swap I mentioned above, it would take about 10min, and see for yourself.

I don't know where you are getting your cavitation stuff from, but you must be using it wrong. You need to really re-think this stuff. You also seem to have no real grasp of what the Fs is, and what happens to it when you mass load the driver.

Do the test, you will see yourr ideas do not hold when the Fb isn't tied to Fs, and your knowledge will grow.

Also, as you know nothing about me it is pretty dumb to think that I have never done any of this stuff for myself.

If soho54 stopped posting, that would be a big loss to the community. You on the other hand, it would be a welcome change. You may be very knowledgeable and experienced, but until you lose the condescending attitude, its just wasted walls of words. And with that said, I add you to my previously virgin ignore list - see, you really are special.

Unlike you I am not trying to impress anyone. Just correcting this stuff that you are throwing around here like you know something the rest of the world doesn't.

The fact that you can not explain your position on anything without alluding to some higher knowledge you have gained in the last 6 years, and us mere mortals with our real world measurements and tested models could not hope to grasp, does not help your case at all.

If you go back and read all the threads from all the different forums you will see who started what.

Your ideas where questioned, and instead of providing any proof, or even trying to better explain yourself you chose to belittle the intelligence of anyone who questioned your ideas, and then it got ugly.

All you see here is a continuation of these events.

That said I am willing to start over. Clean slate.

Hi there,

You have some interesting ideas there that do not seem to jive with the commonly held theory. Can you elaborate on your views a little more? I guess we can start on how a drivers Fs drives the standing waves in a TL instead of path length, and going even further how do those standing waves form, propagate, and sustain inside an open ended pipe?

Im calling BS again.

1. You have yet to ignore anyone simply because you continue to response to all replies.

2. Many of your FIRST posts in several threads have been onsolicited attacks. Do you really need me to point them all out???

3. Any so called attack has simply be a defense to you posting how stupid everyone else is in 99% of your posts.

How do you want people to reply when every post from you has a common insult like "bogus claims to knowledge "??

Besides all that banter Im still completely confused about your real beef??

I still do not understand why you are against DIY Horn subwoofer designs. I asked once before but I will asked again.

Please provide me with a solution that does around 115dB that costs under $100 and only needs 100Watts.

Honestly, This whole push about TL does not make sense when we are talking about subs. You have to realize that no one cares about full range main speakers any more. Subs are just superior, there is no reason for 2.0 when 2.1 offers superior in room response. You want 2.0 put a quality sub under the main speakers EQ them together with the MiniDSP....I just see little value in TL designs period, it just seems like a compromise to real bass setups.


TL designs just are not HT friendly so who really cares when HT is the predominant discussion???

There's nothing wrong with the TL's but they don't really bring anything to the table that a ported box with some stuffing doesn't bring. I came to that conclusion years ago, when I was interested in them, with measurements and (gasp!) sims, and then moved on. When Courtney does some real measurements for himself, he'll probably come to the same conclusion.

Where is Vas when we need him?

[He'll take care of this toot sweet.... ]

Actually, they do. When properly designed and implemented they use high Qts drivers, which are generally less expensive than the low Qts that work best in VBs. Response is a combination of VB and IB, so it's a bit of a best of both worlds alignment. But where subs are concerned IMO an eleven foot or longer pathway cab that's no more sensitive than a VB isn't worthwhile. I personally wouldn't do a TL below 40 Hz.

Good point, Bill. But, in the big scheme of things, I'm not sure saving 10 bucks on the cost of the driver is worth the added complexity of building a TL enclosure.

I don't do TLs to save money on the driver cost, that's just a side benefit of the design.

Im still confused on the entire comparison though and your point about TL below 40Hz, confirms it.

TL designs are main speaker designs but all of the Horn discussions/builds are all about subwoofer designs.

There just seems to be a disconnect here and misdirected anger at the wrong crowd.

Everyone is building horn type subs and he is pissed because they are not building TL speakers?

Good luck with that idea