My latest iteration of the batcave system is a cheap 2" driver loaded into a tractrix horn
I am getting useable response from 200hz to 16khz. Below is a 15" woofer in a U frame with response down to 35- 40hz in room. Subwoofer support is in progress
The clarity is exceptional especially in the lower midrange and upper bass. The sound is very accurate and clear on axis with the point source covering most of the audible range
Next ill try some 3.5"-4" drivers in a JBL conical midrange horn pictured below
Anyone else had success with this setup?
I am getting useable response from 200hz to 16khz. Below is a 15" woofer in a U frame with response down to 35- 40hz in room. Subwoofer support is in progress
The clarity is exceptional especially in the lower midrange and upper bass. The sound is very accurate and clear on axis with the point source covering most of the audible range
Next ill try some 3.5"-4" drivers in a JBL conical midrange horn pictured below
Anyone else had success with this setup?
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I've had success loading a fountek fr88ex 3" into a 360hz tractrix.
Crossover is between 140hz and 5916hz ,.
http://www.diyaudio.com/forums/multi-way/279475-finished-horn-open-baffle-build.html
Crossover is between 140hz and 5916hz ,.
http://www.diyaudio.com/forums/multi-way/279475-finished-horn-open-baffle-build.html
How do they compare to your 1.4" CD system?
Where are you sourcing all these great-looking horns?
Note, the JBL is not a conical 🙂 They have some daft 4-letter acronym for this type, which loosely translates to "a normal horn with a bit of butt cheek mixed in"
http://www.jblpro.com/pub/obsolete/2404.pdf
Where are you sourcing all these great-looking horns?
Note, the JBL is not a conical 🙂 They have some daft 4-letter acronym for this type, which loosely translates to "a normal horn with a bit of butt cheek mixed in"
http://www.jblpro.com/pub/obsolete/2404.pdf
Hi Scott,
The current set up uses a 2” Hivi / swans aluminium driver. The woofer is a PRV 15W700; this driver has a low Fs for a pro woofer and highish QTS so works well in the U frame.
Amps are alternating between a JLH class A amp (10W) and a GU50 tube amp (10W) for the horn and a pro audio amp for the woofers. Crossover is a minidsp 2 x 4
That looks amazing, what a great effort
Hollowboy,
The 1.4” CD in the azurahorn sounds a TOUCH more dynamic and open. It worked better in my old room but in the highly reflective batcave they are harder to tame. In this room the tight dispersion of the large tractrix horn wins (at the expense of he sweet spot size) as does the ability to have one driver covering such a wide range
Thanks for the correction on the JBL horn profile. I stumbled on a second hand pair on ebay but I believe they can be purchased from JBL suppliers in oz. They have a 100mm diameter throat which should fit the scan speak and seas 4" full range drivers
The current set up uses a 2” Hivi / swans aluminium driver. The woofer is a PRV 15W700; this driver has a low Fs for a pro woofer and highish QTS so works well in the U frame.
Amps are alternating between a JLH class A amp (10W) and a GU50 tube amp (10W) for the horn and a pro audio amp for the woofers. Crossover is a minidsp 2 x 4
That looks amazing, what a great effort
Hollowboy,
The 1.4” CD in the azurahorn sounds a TOUCH more dynamic and open. It worked better in my old room but in the highly reflective batcave they are harder to tame. In this room the tight dispersion of the large tractrix horn wins (at the expense of he sweet spot size) as does the ability to have one driver covering such a wide range
Thanks for the correction on the JBL horn profile. I stumbled on a second hand pair on ebay but I believe they can be purchased from JBL suppliers in oz. They have a 100mm diameter throat which should fit the scan speak and seas 4" full range drivers
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Nice build! I believe this would qualify as a horn-loaded FAST. Any chance of getting measurements and/or an audio clip sample?
Hi, i have a small dayton phone mic. I wonder if this will record a sound clip when I use the phone video camera?
I'll see if i still have the measurements. This was meant to be an experiment but i havent been able to stop listening to it!
The horn boosts the low end a lot and allows the fullrange driver to play easily down to 200hz without sounding anemic. I think in that sense it is better than a standard FAST arrangement at the expense of size.
Ive ordered the SB acoustics 2.5" and a biradial horn as well. More updates to follow.
The clarity is really amazing particulary in the midrange and upper bass. I guess this is what the unity horn folks have been talking about. The concept is similar.
Any other projects that people have to share?
I am sure you caught this thread. Its the same sb65 full range driver I loaded into an xt1464 horn
http://www.diyaudio.com/forums/mult...synergy-unity-horn-spherical-proportions.html
http://www.diyaudio.com/forums/mult...synergy-unity-horn-spherical-proportions.html
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What are the dimensions of those waveguides? They look to be about 22 inches wide by 14 inches tall by 10 (? complete guess) inches deep. Did you make them yourself?
That little A2S driver (that's what it looks like anyway) only has a sensitivity of 78dB at 1W/1m and Fs of 150Hz. You should try different drivers. Horn loading the Tectonic Elements TEBM35C10-4 would be pretty interesting. With slightly better sensitivity and more xmax it might have even more dynamic bass. There are lots of other 2 inch drivers out there that are more sensitive as well.
F.A.S.T. = Fullrange and Subwoofer Technology
A fullrange crossed to a larger driver below.
Bushmeister's horn crosses much higher than most FAST designs tend to.
The Aura NSW2-326-8A would be interesting to try and are pretty cheap. Higher sensitivity and much more x-max. The dropping top end might need more EQ or not work at all on the horn. Looks to be almost identical physically from the front.
View attachment 296-252_AuraSound_NSW2-326-8A_Specifications.pdf
View attachment 296-252_AuraSound_NSW2-326-8A_Specifications.pdf
The horn is a tracrix expansion with dimensions 24w x 16h x 21d in inches
I wil be trying other drivers soon. The SB acoustics one should work well
Yes, thats how I found out about the SB acoustics driver. Your solution is more sophisticated than mine with the multiple drivers acting as a point source in the one horn. My setup is the lazy mans "synergy" 🙂
Yep, that driver looks good for this application. I might give it a try as well. Thanks
That's a lot deeper than it looks! Did you make it yourself?
Looking forward to your comparisons with other full range drivers mounted in that horn.
I've experimented with loading several small drivers in various tractrix horns. Works very well. The problem is directivity of HF response and lack thereoff in bigger drivers. You either go for "magic" mids, or amazing highs or just build additional horns for seperate drivers. I've had best results with loading a 30 cm x 30 cm square tractrix loaded with 1" alu driver, with highpass at cca 800-1000Hz.
I aquired the horns from a local DIYer. They are made of stacked MDF fillets and sanded smooth. I dont have the time or patience to build curved horns myself 🙂
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