Reason the port works is there's little (no) pressure in one end and chamber in the other, by stickin a horn behind the port, you change this so the port sees pressure in both ends, so as a result you "just" get a front loaded chambered horn, Now that can work very very well, but you don't get any benefit from the ported design....
There's no such thing as a free lunsh...
There's no such thing as a free lunsh...
Cal? Red, green,black and blue units??
Don't see no red, don't see no green.
I see something that looks like a hf horn in blue??
Large grey monsters...
_-_-bear
Don't see no red, don't see no green.
I see something that looks like a hf horn in blue??
Large grey monsters...
_-_-bear
Actually I was the proud owner of a pair of Altec A2's in the 80's. A funny thing happened, a couple of guys from Nasa / Stennis came into my studio started taking tape measurements and bought them for a price I cant bear to think about. Grrrrr. Stupid kid. (me)
Yes the ones near the outsides of the picture.
Yup, all the cabs that look like that meet the description. Those horns are actually ports, double ended if you will. The difference in the colour is because I had a bunch of old spray paint cans laying around. Guess how much was left in each?
Maybe turn up the brightness on your screen my friend.
Yes and to think they used to keep us awake at night when we were kids. Now we welcome them into our homes.
Oh wait...they don't fit through the door. Good thing, they can scare away all the bogie men outside.
Cheers. 😀
Cal,
Back in the day a port of that size was called a venturi port, not a horn loaded port.
All a matter of size and semantics though 😉.
Art
Art,
I can appreciate that and I'm glad you posted. If I used that term nowadays I might confuse the masses.
Who remembers a squawker, a drone cone, what a subwoofer used to mean or what a waveguide was? The evolution of the audio language I suppose. It's not talked about or utilized too much so I thought I'd 'describe' it instead.
Man, I miss the old days.
Cheers Art.
I can appreciate that and I'm glad you posted. If I used that term nowadays I might confuse the masses.
Who remembers a squawker, a drone cone, what a subwoofer used to mean or what a waveguide was? The evolution of the audio language I suppose. It's not talked about or utilized too much so I thought I'd 'describe' it instead.
Man, I miss the old days.
Cheers Art.
The folks @ Klipsch probably remember. As far as Im concerned the Heritage stuff is as good as it gets.
Hi, read up about Danleysoundlabs Synergy horns. To my understanding many of these are front loaded horn, with a fairly short horn, loading down to maybe 100Hz, with a port tuned for maybe half that, to fill in the bass below where the hornloading drops off.
Hornresp should simulate this general concept fine.
Hornresp should simulate this general concept fine.
Well hell, Danley did exactly that and achieved 100 db full range
speakers. So it is a brilliant idea, but as usual nothing new (-:
speakers. So it is a brilliant idea, but as usual nothing new (-:
The Synergy style horn can be simulated as an offset conical horn with bass reflex.
If the ports are located towards the mouth, the simulation should be fairly close to reality in the horn passband.
are we talking about a klipsch lascala ?
Something like that ?
There are ported W-bins (I had one), but the port doesn't firing into the horn (least ones I've seen).
The tuning frequency is probably way lower than what the horn mouth/length is loading at, so I doubt if it was ported into the horn, that it would have helped any.
here is a thread on porting W-bins.
http://www.diyaudio.com/forums/multi-way/25493-folded-horn-w-bin-porting.html
Something like that ?
There are ported W-bins (I had one), but the port doesn't firing into the horn (least ones I've seen).
The tuning frequency is probably way lower than what the horn mouth/length is loading at, so I doubt if it was ported into the horn, that it would have helped any.
here is a thread on porting W-bins.
http://www.diyaudio.com/forums/multi-way/25493-folded-horn-w-bin-porting.html
This post actually really excites me! A while ago I posted something about "a vented horn"
Heres a link to my post
Heres a link to my post
My guess is that it would shift the port freq way out of what it should be in free air. Think about it. The whole idea of a horn is that it serves as an acoustic transformer, to convert high pressure at a low volume of air motion to low pressure at a high volume of air motion. It's not a bad idea. I just don't think you can start with a system that was tuned for free air and stick a horn on it. If you had a way to measure things, you might be able to make adjustments to the port and box size to get it right.
Last edited:
- Status
- Not open for further replies.