Horn system pictures

[Hoerninger]

More Info:
http://audioheritage.org/vbulletin/s...ad.php?t=13637
___________
Peter

[Woofer]

More Info:
http://audioheritage.org/vbulletin/s...ad.php?t=13637
___________
Peter

Thank You Peter.....
Very impressive bit of insight.

[cvengr]

My small horn speakers. In VietNam too...

Very nice work, Huynh.

[Zilch]

I do it myself too!
Nothing unusual in that, if a wide dispersion is what you want.
One could ask the same question, "why do you mount horns horizontally and not vertically?"

Nope. Very NARROW horizontal dispersion in that orientation, with lots of reflections coming off the floor and ceiling. It's the diffraction slot edges that produce the wide dispersion in that design:

http://www.jblpro.com/pages/pub/components/2405.pdf

Horns have directivity, also. That's kinda what they're about, mostly, anymore....

[Woofer]

Nope. Very NARROW horizontal dispersion in that orientation, with lots of reflections coming off the floor and ceiling. It's the diffraction slot edges that produce the wide dispersion in that design:

http://www.jblpro.com/pages/pub/components/2405.pdf

Horns have directivity, also. That's kinda what they're about....

Hmmmmm...... (deep thought)
Not meaning any disrespect, but yes you're right to a point Zilch, but I've found in past experience that what's on paper, may not necessarily always hold true.
It can sometimes be a bit of a 'try and see' experiment.
What works for some, doesn't always work for everyone, especially depending on your listening environment.
I agree with what you say but, I've experimented with my slots and at the moment, horizontal seems to work best.

Cheers,
Woofer.

[Zilch]

I've found in past experience that what's on paper, may not necessarily always hold true.

It can sometimes be a bit of a 'try and see' experiment.

We have tried, and we have seen:

http://audioheritage.org/vbulletin/s...ead.php?t=6368

Generally, JBL specs are reliable, especially when it comes to the fundamental design and performance characteristics of drivers and systems. We all use that information to our own purposes and pleasures, but in my experience, it's folly to ignore the specs.

If my perception was that 077/2405 had wider horizontal dispersion with the slot oriented horizontally, i.e., opposite of the way JBL employed it in every system incorporating it, I'd sure be wanting to figure out what was going on with the specific application of the device in my design....

[Woofer]

We have tried, and we have seen:

http://audioheritage.org/vbulletin/s...ead.php?t=6368

Generally, JBL specs are reliable, especially when it comes to the fundamental design and performance of drivers and systems. We all use that information to our own purposes and pleasures, but in my experience, it's folly to ignore the specs.

If my perception was that 077/2405 had wider horizontal dispersion with the slot oriented horizontally, I'd sure be wanting to figure out what was going on with the specific application of the device in my design....

I should elaborate. My slots are about 7 feet up, and I sit fairly close to my speakers. If I had them the right way, they'd focus straight over my head.
Maybe it might help if I should cut back on the stuff that I'm smokin' too.

[Huynh Chau]

Very nice work, Huynh.

My system :
1. Tact S2150XDM (use EQ & Room correction) ----------------- Low Bass JBL 2235 (2) cabinet 4350 (DIY)
2. Tact S2150 ----------------- Mid Bass JBL 2226 cabinet 4350 (DIY)
3.Tact M2150 ------- Mid-high JBL 2441 (horn A290A)& Altec 291-16A (horn multicell) (DIY)
4.Tweeter 077
It s' nice sound !!!

[00Robin]

wow,whatcha guys listening to through those monsters?

[Maron Horonzakz]

The 2405 is a diffraction slot tweeter and will give you 120 degree dispersion when the slot is verticle,,

[Woofer]

The 2405 is a diffraction slot tweeter and will give you 120 degree dispersion when the slot is verticle,,

140 degrees Horizontal x 40 degrees Vertical, when the slot is vertical @ 10KHz.
90 degrees Horizontal x 35 degrees Vertical @ 16KHz, and
65 degrees Horizontal x 30 degrees Vertical @ 20KHz.

[Maron Horonzakz]

In an anachoic chamber.

[Woofer]

In an anachoic chamber.

Yes, a very valid point.

[Joe Alesi]

My system :
1. Tact S2150XDM (use EQ & Room correction) ----------------- Low Bass JBL 2235 (2) cabinet 4350 (DIY)
2. Tact S2150 ----------------- Mid Bass JBL 2226 cabinet 4350 (DIY)
3.Tact M2150 ------- Mid-high JBL 2441 (horn A290A)& Altec 291-16A (horn multicell) (DIY)
4.Tweeter 077
It s' nice sound !!!

Hello Huynh,

Congratulations- wonderful workmanship. Can you tell us about the crossover points you are using in the system?

Best
JA

[Akira]

per side: All drivers are compression loaded
2x 15" JBL 2225 bass
2x 12" ATC bass
4x 12"ATC mid horns
1x 2441/ 2393 Lens plate (2404 HF added later)
2x 2470 phonelic drivers
4x 2405 slot radiators