Richard Long's Waldorf restoration

[Mike F]

Damn. You are 100% correct. And this is definitely a nice exemple of plagiarism. ;-)

Look at it as "Imitation is the best form of flattery" I wonder if TAD quality components are used.

[Lee in Montreal]

I wonder if TAD quality components are used.

The Bertha is designed for twin 18" woofers. TAD makes four different 18" drivers.

[louped garouv]

there is no mention of TAD components being utilized in the pioneer offering that I could locate....

[Lee in Montreal]

there is no mention of TAD components being utilized in the pioneer offering that I could locate....

You are correct. Not much tech info. But I don't see what other woofer Pioneer would use in its professional offering.

[Horn Fanatic]

I just found this thread today. I'll try to put this as tactfully as I can. I'm a bit disappointed at how little some folks on this forum know about rear loaded horn design.

This comment especially caught my eye;

"I still think that a back loaded horn with a 2.9m path (9.5ft) tuned to 30Hz..."

I don't know what he means by "tuned", but as a matter of fact, the path length of a rear loaded horn has nothing to do with the horn cut-off frequency. Horns are not "tuned", bass reflex enclosures are tuned.

And this one;

"Experimentation will also be done by increasing the rear chamber volume..."

A comment by one who doesn't understand the relationship between the chamber volume, horn throat, and horn length.

I don't mean to offend, but I'm reading some misinformation here that begs to be cleared up.

[speakerdave]

I'm sensing a lot of bated breath. Perhaps you could fill us in or provide links to good information.

[Lee in Montreal]

Well, I am awaiting enlightement.

[more10]

Anyone who wants to educate himself about horns and horn theory, http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=82144. It is in Swedish but the links still works :-)

Everything there should be sound engineering and science, except for the stuff written by Jonathan Weiss .

[Horn Fanatic]

Well, I am awaiting enlightement.

Allow me to ask you a question.

Do you know what the function of the chamber in a rear loaded horn is, it's relationship to the throat, and why in concert as an acoustical element, they dictate the length of the horn?

Have you ever wondered why, in JBL literature regarding the 4530 and 4520 enclosures, where it's written that the speaker acts as a direct radiator above 150 cycles?

Do you know how the proper horn cut-off frequency is determined for a given driver? Hint, it's not fs.

Last question for now. Are you familiar with filter math?

[Horn Fanatic]

I'm sensing a lot of bated breath. Perhaps you could fill us in or provide links to good information.

I'm sensing sarcasm. As for links? What I reveal here does not come from links, it comes from years of study, research, testing, and practice based on the writings of a who's who of acoustical and electrical engineers dating between 1919 to the mid-seventies. It is those articles and books I used as a basis for writing my horn design program, not buying into canned software. It hasn't failed me yet.

[Horn Fanatic]

Anyone who wants to educate himself about horns and horn theory, http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=82144. It is in Swedish but the links still works :-)

Everything there should be sound engineering and science, except for the stuff written by Jonathan Weiss .

I found a translation to that forum thread some time ago. Nothing there piqued my interest except for mention of a rear loaded horn enclosure designed by a chap named H.H. Klinger. I actually obtained a copy of his book on loan through the library in Malmo. Oddly enough, he recommended loading his enclosure with an EVM 15L.

[Lee in Montreal]

Yowsah!!! Did anybody piss in your cereals this morning? Just out of nowhere, you revive a 4 year old thread and give shit to everyone...

[NickH]

it seems some replies here need a bit of tact. Get some.

[Horn Fanatic]

Yowsah!!! Did anybody piss in your cereals this morning? Just out of nowhere, you revive a 4 year old thread and give shit to everyone...

I see now it was pointless of me to impart some knowledge about horn design on this thread. It's a shame I had to encounter someone who feels that I insulted his delicate sensibilities. It's obvious you're unable to answer any of my questions, so your tack is to display indignation and victimhood, rather than curiosity. I was under the impression this forum was a place of learning, but I see that I was in error.

It's not my loss, it's yours.

Good day.

[1audiohack]

I have learned a lot here and I was hoping to learn something more.

Barry.