I have compared the ripole and the PPD many times. The PPD sounds much more accurate and can be used even with a first-order filter, since the parasitic overshoot due to the fairly long channel of the ripole is practically absent.
Sorry, your personal oppinion about something you think you invented, while simply modifying something well known a little.
No measurments with bone on the flesh, no true comparison. The pictures of your measurements only show you manipulated the set up until it showed what you wanted to see or show others. Nearfield nonsense. If you know how wrong you measure, that is lies. If you don't know, learn some basics as you need them in a world of facts.
What you write, for what reason it may be, doesn't have more value than any kind of propaganda.
No measurments with bone on the flesh, no true comparison. The pictures of your measurements only show you manipulated the set up until it showed what you wanted to see or show others. Nearfield nonsense. If you know how wrong you measure, that is lies. If you don't know, learn some basics as you need them in a world of facts.
What you write, for what reason it may be, doesn't have more value than any kind of propaganda.
If your post was intended for me, then you haven't read the thread carefully. Firstly, I am in no way laying claim to Axel's laurels (by the way, aren't you Axel yourself?). I wrote that the PPD is a modification of the ordinary ripole. Secondly, I believe that patent law has long since degenerated into a money trough for bureaucrats. Therefore, I simply shared my experience for free with those who want to get a real result. This thread has everything you need to achieve it. Anyone who wants to can easily repeat it and see for themselves whether there is a positive effect from such a modification.
Then call it the "Modified Ripole" or "Ripole Mod", but don't give it your name. That implies you invented something new.
Did you understand why your near field measurements don't give a picture of acoustic reality? Most people use a subwoofer for listening in a room, not only measuring. Try at least a 1 meter distance, like most manufacturers do, if you are used to sit so close to your speakers.
See, I do speaker building for about 50 years now and because I'm a technician, I'm always checking practice and science/ theory. If they don't match, something is wrong.
I can say of my self that I had read any available theory around before I turned 20. Before the internet was invented. I programmed TSP based simulation on a calculator, when major speaker driver companies called TSP "trade secrets". Those were the days, my friend...
Even the Ripole was done long before Axel R. patented it, only seen as useless because of high power demand, lack of cheap amp power and no large, high excursion speaker. By the way, cheap amp power was the main thing that changed speaker building and driver construction in the last decades.
Suddenly, old ideas, that did not work in the past, because of hardware limitations, got re-discovered and now can be used with some success.
The open baffle or folded baffle speaker is in deed the oldest cabinet principle used and tried in any thinkable variation.
Did you understand why your near field measurements don't give a picture of acoustic reality? Most people use a subwoofer for listening in a room, not only measuring. Try at least a 1 meter distance, like most manufacturers do, if you are used to sit so close to your speakers.
See, I do speaker building for about 50 years now and because I'm a technician, I'm always checking practice and science/ theory. If they don't match, something is wrong.
I can say of my self that I had read any available theory around before I turned 20. Before the internet was invented. I programmed TSP based simulation on a calculator, when major speaker driver companies called TSP "trade secrets". Those were the days, my friend...
Even the Ripole was done long before Axel R. patented it, only seen as useless because of high power demand, lack of cheap amp power and no large, high excursion speaker. By the way, cheap amp power was the main thing that changed speaker building and driver construction in the last decades.
Suddenly, old ideas, that did not work in the past, because of hardware limitations, got re-discovered and now can be used with some success.
The open baffle or folded baffle speaker is in deed the oldest cabinet principle used and tried in any thinkable variation.
I'll tell you even more, you don't even need a speaker in the traditional form, and even more so, you don't need any boxes. PPD is also yesterday. Learn to make the right DML loudspeakers and you will refuse to listen to traditional speakers forever.
Attachments
Sorry, I cant afford Boa Constrictor sized wires. I will keep my speakers. They work with less frightening snakes.
I have finished my test cabs for the PPD sub with integrated baffle for low-mid and horn.
In the bottem on the back the Hypex FA503 amps with dsp will be placed.
Next step is mounting the drivers and amps and have some measurements for crossover and tuning.
Woofer is Precision Devices PD.153C002
Mid 18 sound 10NMBA520
Horn with CD Beyma CP755ND Al
In the bottem on the back the Hypex FA503 amps with dsp will be placed.
Next step is mounting the drivers and amps and have some measurements for crossover and tuning.
Woofer is Precision Devices PD.153C002
Mid 18 sound 10NMBA520
Horn with CD Beyma CP755ND Al
