But is it designed to go much lower when multiple stacked, like early cinema (mid) bass horns?
The Alpha Horn is intended for home hi-fi, and it becomes a true 2-way with a different compression driver.
Haigner also designed this stack:
In view of this, my audio related experience during New Year's Eve might be worth sharing.
First a quote I came across:
"although I disagree that its hard to make good speakers sound bad – the room and setup has far more impact on the sound than the speakers, as an extreme example imagine putting some Wilson audio speakers costing £100k’s in a bathroom!"
After 2 private lockdown parties, 'we' were able to attend a public party again. This time in a venue that opened in 2017 as a pop-up club for a period of originally 4 months. In the best Berlin tradition, the site breathes large-scale industrial activities from the past.
From the outside:
Entrance hall:
Although the building looks and is huge, the actual club only occupies a small area, divided into 2 rooms. The party was (fortunately) also small-scale > 1200 tickets were available.
When you see this:
You wouldn't immediately expect this:
Almost literally a bathroom, or more precisely: a former washing room.
How on earth do you get acceptable or even good sound here?
Exactly as you can see in the picture: Triple flown Funktion One Resolution 5Es in stereo setup + a 'baffled' horn subwoofer wall in the middle, with 2 Resolution 4Es as infill halfway.
I even doubt whether it is an official installation with new speakers, but anyway this is the work of a knowledgeable FOH engineer, because there was hardly anything to complain about.
When you see this:
You wouldn't immediately expect this:
Almost literally a bathroom, or more precisely: a former washing room.
How on earth do you get acceptable or even good sound here?
Exactly as you can see in the picture: Triple flown Funktion One Resolution 5Es in stereo setup + a 'baffled' horn subwoofer wall in the middle, with 2 Resolution 4Es as infill halfway.
I even doubt whether it is an official installation with new speakers, but anyway this is the work of a knowledgeable FOH engineer, because there was hardly anything to complain about.
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Tony Andrews tends to contradict himself in his marketing fueled comments, which seems to generate outspoken fans and haters of the brand.
This blog post is interesting and be sure to read the first/newest comments for some nuance.
This blog post is interesting and be sure to read the first/newest comments for some nuance.
I like this approach, a lot, but for my design, crossing at 200hz, I think the design I have going suits me better. I can skip the flair, increase enclosure volume by using a straight CSA. The slot null in my case serves to steepen the crossover at 200hz. This design is the same height as my PPSL and 4 inches wider but it doesn't have half the internal volume I bet. That will effect lf efficiency. Thats all I got, the above design is pretty awesome lol.
I would suggest that I have a little more efficiency than the Haigner.....There would be a difference in the shape of the response towards the cutoff of the lines in front of each design, but sub bass would be similar, my PPSl has a larger internal volume from what I can see here. My HornResp shows me around ~9mm at 30hz/115db/1m half space.
Hmm, we seem to be having a 'failure to communicate' 🙁, but thanks anyway, it was just idle curiosity.
Possibly this one? Edit: sticker at 10s with
I don't know if this is marketing speak or not, but apparently it is a paper cone that is horn loaded with a special Axe shaped phase plug to get the range.
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Maybe a bad case of Simmitus??? Lol
....that looks really whacked vs any measurement I've made of my ppsl subs.
And synergy sections' impulses don't show anything remotely like that kind of double peak either.
I am here for the measurements😊...I predict multiple peaks...lets see it. 1" in front of slot
Keep in mind that SIMs of IRs are always going to be cleaner than the real thing. The measurements will likely be a slightly smeared out version of the SIM. Assuming the SIMs are correct.
There is a law of impulse responses that for any system that is HP (which all loudspeakers are,) the sum of all the points must be zero - zero response at 0 Hz. I don't see how those double peaks could ever average to zero, which maybe makes me suspect some error somewhere.
PS: Looking back again, it is possible that it all sums to zero. Its still cleaner/sharper than any acoustic impulse response that I have seen.
There is a law of impulse responses that for any system that is HP (which all loudspeakers are,) the sum of all the points must be zero - zero response at 0 Hz. I don't see how those double peaks could ever average to zero, which maybe makes me suspect some error somewhere.
PS: Looking back again, it is possible that it all sums to zero. Its still cleaner/sharper than any acoustic impulse response that I have seen.
Hi, what does "HP" mean? thx.
Looking at the sim again, seems to me two such sharp peaks would be remarkable, even for a compression driver.
A sub? nooooooo way
...like you say, cleaner/sharper than seen
It makes sense to me. By less clean, I think blurred....by blurred, I mean multiple peaks..
I can see the two significant peaks can you? My measurement has the peaks going down, does that mean its opposite phase? Thank you btw @David McBean 😊 Nvr would of pulled the trigger without the simulation experience I've had with this program.
All you have to do is imagine, the radiation source in the slot, sound energy, travelling in any direction and possibly traveling to your ear due to the angles. So in so many words the slot provides more surface area for reflections that are closely timed to the true impulse had from directly the driver and no slot. The back wall of my slot, facing the listener, increases the coincidence that a path from the driver to the ear happens. I think for bass, this is acceptable. TH also has strong, additional ,transients due to the backwave, hence multiple peaks. I imagine most vented designs have this trait to some extent. The stronger additional peaks represent some high coincidence area of reflection or backwave etc...
A waveguide on a compression driver is likely a better performer, but any driver faced side ways, in a line, is going to increase ringing in some shape of form is what I would think. A constant CSA line like a slot, like in my PPSL, probably is worse case scenario, possibly with tapering being worse or interesting lol, but for sure, expanding lines, are going to make things better.....just not better than being at the beginning of the line, front/backloaded.
Thinking about bass, I would take into considering cycle time. 200hz is 5ms, lets say my additional transient is slightly below 2.5ms....I have no training on the topic but I've heard(read) people discuss rules of thumb about GD in bass design. Keeping GD no higher than half of cycle time. I think the same ideas could be applied to slot reflections. You could just leave it up to perception, I wonder what science says about it. I can see why a strict person would not want to use a Slot, from a technical stand point, regarding these reflections but....it is the headroom and bandwidth. If the flaws are out of perceptions view, why not is the real question. With the right design, it maybe possible that dual 18"s can be used like this in 2 ways to a higher than 200hz, dual 15;s even....the headroom and lf extension is welcome. A ported single 18"/15" cannot compare. A sealed single 18" or 15" cannot compare. Its the headroom per sqinch. In regards to a 2 way, there is no other way to increase headroom without increase the amount of space the cabinet takes up, yet it consolidates the outputs of the additional driver into a coupled output, out the terminus. The magic of a 2 way is the small acoustical footprint that in particular, allows close monitoring, but generally speaking better summation. This is due to the shorter distance from the top to the bottom of the radiation sources combined. The more headroom you can cram into the smaller amount of distance, the more like a point source it is and the better it sounds.....as long as its not producing additional distortion as a result, that can be easily perceived. The directivity character makes it not suitable to make to a waveguide. Is this true? For a driver section that needs to play to 200hz....I but it can't be beat PPSL sealed/vented.
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