small horn for 2inch comp. driver

[panduro]

Hi all,

complete newbee in the horn/waveguide department. read the first ten pages on geddes on waveguides, but to advanced for me...

im gonna build 3-way active ht speakers, using jbl drivers, 12", 6,5" and a 2" compression driver(jbl nd276). the horn that came with the driver is to wide(38cm) for my design. I need a horn within 20cm wide, 15cm tall.

I dont know much about horns yet, but figure(hope) i should not have a prob with crossin at 2000hz with a smaller horn.

so a well sounding small horn available in europe, any suggestions?

best regards

pandro

[whgeiger]

15" wide for horn vs. 12"+ for the woofer. Recommend +3" to enclosure width and leave tweeter as designed.
Regards,
WHG

[Defo]

Why not use a 1" compression driver instead when crossing that high? Better high end extension and dispersion then a 2" driver.

[panduro]

First thanks for the answer, i appriciate it!

Hmm sorry i dont really understand what you mean.

i am gonna build a 3-way, basreflex for 12", sealed 6,5 midrange and a horn loaded 2 inch compression driver for the hf.

You mean i should use the 15 inch wide horn that came with the tweeter to mate it well to a 12 inch bass? and that i should do a 18 inch wide enclosure?

The jbl compdriver, is close identical to the rest of the 2 inch jbl comp drivers (in mechanical build). which i suppose is ued with alot of different horn for different applications.

The horn was designed for very wide horizontal and little vertical dispersion applications. high spl long range wide soundpicture.

I would like my speakers to have a bit more vertical dispersion, as i dont need so much horizontal dispersion or as high spl at a long range distance, with seating position is only 6-8 feet away

hope you will take the time to reply and indlighten me as i need all the help i can get.

ps sorry fore the bad language!

BEST REGARDS

panduro

[panduro]

Hi Defo,

2 reasons and an oppinion..

first: I got a really good deal on 5 2inch drivers.

second: gonna do 3-way for the 3 front speakers, but 2-way on the rear(2" and 8" midbas).

oppinion: 16khz-20khz not really that important in a speaker only for ht, and the should do 18khz.

thanks for the reply, and please feel free to comment or give advice!

best regards

[Flaesh]

it would be understandable if you have named your drivers\horns.

[panduro]

cool, here it is!
bas Driver jbl le120h-1 12 inch
midrange jbl 726 gs 6,5 inch
compression driver jbl nd276 2 inch throat
horn:? 15inch wide/ mouth 3,5 inch tall and 6,3 inch deep

best regards

panduro

[moray james]

Originally Posted by Defo

Why not use a 1" compression driver instead when crossing that high? Better high end extension and dispersion then a 2" driver.

Defo: I recently spent some time looking into the possibility of upgrading the mid and high frequency compression drivers on a set of Klipsch Forte ll speakers. After a long hard look I decided to keep the stock drivers. During that time I found that the compression drivers which had the smoothest most extended range (ie.flat out to 20K) were two inch throat drivers. I don't think that I found a single one inch compression driver which was smooth and flat out to 20K. I did find a few tweeter combos, driver with horn which fit the bill but no comp drivers alone.
So I am wondering what you may have seen to prompt your comment? Further why would a one inch comp driver have better dispersion than a 2 inch unit assuming that both used design specific horns? Thanks Moray James.

[panduro]

Hi all,

I appriciate all the answers and help to guide me in the right direction!


I can only find small 1 inch horns, yes im am awere that its kind of logical: small driver small horn, high cross frequency, but none the less i got 2 inch drivers an want a smaller more domestic appeeling horn!

If somebody know of relativly compact horns for 2 inch drivers, round, square or some where in between please let me know!

best regards

panduro

[Pano]

Hi,
I think you are going to run into the problem that most 2" throat horns are meant for midrange duty and thus are large, just like your JBL. 40-46 cm is common.

But there are some smaller 2" horns made. Have a look at these, just as an example:

• Eighteen Sound XR2064
• BEYMA TD-460/N
• Eminence TI2000
• Selenium HL14-50

Look for a smooth inside curve. Some of these are diffraction horns with abrupt changes in the horn profile. Not the best choice for home use.