Voigt Pipe questions & considerations

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Voigt Pipe questions & considerations

Рет қаралды 514

Күн бұрын

Answering questions on VP design & compromises. Again, I failed at giving it a trendy KZfaq-style clickbait title... sigh....
About time for a KZfaq title that truly embraces the platform's legendary traditions - you know, the clickbait, the outrage, and that irresistible blend of contentless, yet wildly popular dipshittery. Brace yourself for an opening shot that's as disconnected from content as it gets! Surprise - surprise, find ACTUAL HELPFUL CONTENT that will take you to the next chapter in you audiophile journey. ENJOY! 🚀
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Пікірлер: 16

@danbuffington75 2 ай бұрын

6:30 Good point about the synergy of the system. First things first starting with the room.

@danbuffington75 2 ай бұрын

Placement is important. Sound travels roughly 1 foot per millisecond, and every room will measure differently. I heard that a 6 millisecond delay is what many find pleasant in the soundstage.

@hugobloemers4425 2 ай бұрын

My gut feeling tells that the sound waves inside a Voigt Pipe are predominantly propagated vertically and that there is hardly any energy in lateral sound waves (the ones that can create standing waves at the side walls with the right frequency). The conclusion is that the parallel sidewalls of the Voigt Pipe should not create any issues at all. I could be wrong and I have no math to back up my thoughts, but in my mind this is very plausible. I also agree that the elegance of the Voigt Pipe is its simplicity. The most difficult part is to make the diagonal cut to create the side walls. I would love to see a video with one or more methods to do that, using DIY tools.

@jimmiedean8035 2 ай бұрын

👍

@danbuffington75 2 ай бұрын

The dipole effect will neutralize the modes that would otherwise be created on the sides. The Voigt pipe, well, and other sorts of transmission lines behave similarly to open baffles. In engineering and physics, there are constant trade-offs. Pick your poison.❤

@ThePerkri 2 ай бұрын

The “pyramid” speaker you are referring to, is commonly known as a “Metronome”. And as far as getting an exceptional sounding Vogt Pipe, I think Martin King may have a thought or two on how much subtle changes in design parameters will effect the ultimate outcome of the speaker’s performance… I agree that a Vogt pipe is a simple speaker to build, and one will be rewarded with a unique sounding speaker. To make an exceptional sounding Vogt pipe, is not an easy thing to pull off. Look at Cain & Cain speakers. They look common, but they are not. And having built dozens of different enclosure types for full range drivers, the Voigt pipes rank at the top with a couple of other designs that perform at a really high level. Sadly, the Le Grande, for all the time and effort it took for me to build, ended up being set aside and the wood being recycled, as it did not work for me at all. I agree that Voigt pipes are a basic, inexpensive speaker to build. With a small amount of effort being put into damping/stuffing the line, and looking into the implementation of either/both a baffle step or notch filter to address nasty peaks, will reward you with a special sounding pice of kit.

@realworldaudio 2 ай бұрын

Thank you for the detailed feedback, much appreciated! The La Grande is really a stepping stone in direction to the Voigt pipe. I did not design it to be ultimate in any category. It has one purpose: it is an indicator of the systems tone, balance, and synergy. A stepping stone and a calibration tool to develop / voice the rest of the system. If the rest of the chain is on point, it sounds very remarkable, I can even listen to it instead of the Voice of Lancelot (in my living room - main system). Any issues, and it will report it - in my office they sound relatively UTTER GARBAGE. Same speakers.... in the office they are superlative for zoom calls, but very very far below even a mediocre commercial setup. And it's the exact same speaker. ;) . I am not saying your system has problems, I'm pretty sure you have voiced it very carefully and it sounds very good... just going in a different direction than what I call as my golden path. (It's not the only golden path, just the one that I know of how to achieve...) In my experience the nasty peaks of a Voigt pipe are the (almost) exclusive problem of the amplifier and the chain, which excite those otherwise dormant issues. When the chain synergizes, then those peaks entirely disappear without any filters. Of course, depending on your room / amp / cabling, you might need the filters, and I did run into such situations before. My experience was that in those situations I did not reach the potential of those speakers.

@realworldaudio 2 ай бұрын

And thank you for mentioning Martin King! He has a fantastic online resource for TQWP / pipes: www.quarter-wave.com/

@germangesse8233 2 ай бұрын

Hello Janos! Thank you so much for such a detailed answer! As I understand it, the general principle of a hollow tube (!) is that sound waves move up and down a column, and for moving this column, parallel side walls are a very suitable solution. And a change in the parallelism of the walls, as you said, leads to a change in the principle of operation of the hollow pipe... Thank you very much again for your answer!

@naren.freak1c 2 ай бұрын

Front baffle to back is 2:1.5 ratio in width and the sides are slightly curved to meet the back. Top and bottom are slanting( angled inwards from front to back) as from the front baffle to the back side, and back side is smaller in height compared to front baffle. Does building speakers like this has any benefit, like reducing one resonant frequency? I think borresen speakers are built like this.

@hugobloemers4425 2 ай бұрын

Hey Janos, I noticed you are at 4k9 subscribers. It would be nice to celebrate the 5K mark some how. I am looking forward to your thoughts on that.

@realworldaudio 2 ай бұрын

Indeed.... thank you for catching that! I have stopped looking at the metrics over a year ago. Subscribers slowly rising, but actual views (number of people interested) has sharply declined a good while ago and never returned. Global crises have a very deep effect on everyone.... especially audiophiles. Now I have doubled the subscribers since, but have as many views when the channel had 500 scribes... or less. Not just me though. Pretty much everyone who has quality content on YT reports their support base took major hits. I'm doing this channel for you, for Gerald, Lou, Frank, Eduard..... and do not really mind the stats. Indeed, though. I will think about something for the 5K! Never thought I would ever reach even 100, so cause to celebrate. ; ).

@hugobloemers4425 2 ай бұрын

@@realworldaudio The economical situation does affect us all including audiophiles. So much more reason to benefit from a channel that helps us with low cost audiophile results as alternative to the spending carousel. It was always going to be a niche channel, but it must somehow be frustrating that reviewing Fossi Audio Amplifiers and SMSL DACS can support an army of KZfaqrs whilst a unique audio channel is more a work of love than an income on the side.

@zixzysm 2 ай бұрын

I am happy to say we are close to finishing the Voigt pipes :) will try sending a few pics. I managed to get a nice little home built tube amp for them, and soon they will be playing. It is going to be a work in progress, drivers and front+back baffle material will probably change over time. For now a pair of TBs but there are some old green cones in my boxes that I would like to try too.

@datdudeinred Ай бұрын

Hey Janos. Hope you are doing well. I have a question. I was wondering if using a single woofer say purifi 10" & using it with closed back mid & tweeter like bliesma beryllium domes instead of full range driver ofc xo will make it worse than single driver but it should otherwise be identical to the working of your cube audio right?

@tarasian666 2 ай бұрын

Hello Janos! I've built 2 folded voight pipes using calculator, first one with 6.5inch speaker driver, second with 8 Inch. What i have noticed that speaker driver position in that calculator is always somewhere 1/3 of pipe length from the closed part and you are telling that it should be 1/2 of the length. What does the driver position affect? And my second notice is that my pipes always resonate at second harmonic (annoying spike), to flatten that spike I put polyfill in the middle of pipe, but that resonance is still noticeable. Is that related to driver position or something else wrong? Different pipe length, different drivers but the same problem... Also that calculator relies on driver resonant frequency, pipe resonance = driver Fo / 1.333