Thanks so much for the response Janos! After spending most of yesterday switching out amps and preamps, I finally came to a magical combination! When you mentioned the negative feedback being a problem it all made sense too. I first tried the pipes with a class A amp. Sound was terrible! Amp has lots of feedback…. Tried several more solid states ( I do not have a tube amp) with different preamps with more frustration when I came up with one more combo. Used my Schiit Valhalla 2 as a preamp and ran that to two heavily modded Aiyima A07’s running as mono blocks. Sound was so good I spent the rest of the night listening in amazement. Brought my wife down to listen and she was shocked too, said it sounded so much better than earlier listening trials. You nailed it Janos, the pipes don’t like certain amps. Thanks again for all your help and knowledge. These pipes ROCK!
Hi Janos it's Greg from Cube. Thanks for the great video as always ;) I'd add one more thing about the midrange balance. Fullrange drivers in Open Baffle have naturally louder volume of the mindrange than in any cabinet. Since the Bass depends on the cabinet and OB cancel the bass, that unless supplemented with additional bass drivers will make the midrange louder when it comes to balance itself. Additionally high frequencies are generated by the fullrange drivers from the front side of the cone and the midrange since in OB its not absorbed by the cabinet is propagated both ways from the front and the back of the cone making the midrange 6db louder than in any cabinet. Hence the difference. The Voigt Pipe is a great option for a cabinet for a Fullrange driver and it's still a compromise like all cabinets types and Open Baffles. However with any 8-10 inch drivers I'd go for a VP cabinet over OB if additional bass is not added to the OB ;)
Thank you Greg for the superb overview! Indeed, that midrange boost gives the OBs a lot of fantastic charm. Some music just sounds the best on them. Somehow Led Zeppelin and King Crimson sounds to me the best on OB... Indeed, I concur with you, VP are more versatile with the more extended bass compared to OB with a 8-10in driver. Happy Easter Greg! Janos
Hello Janos. Would it make sense to use a two-way design in Voigt pipes? The lower frequencies can be fine tuned by the shape, size, and mouth opening of the cabinet while the midrange and high frequencies contribution could be fined tuned by the crossover (and the choice of tweeter and woofer).
Try without any, and then add a progressively more and see how it changes. My experience is that stuffing is customization, and is a powerful means to get the balance between room / speakers / amp right. Feel free to find the right amount, there's no set amount that's guaranteed best.
janos, would there be anything to adding a smaller port halfway along the pipe at the upper section? allowing those higher frequency's to escape a bit before being merged into the lower frequencies at the bottom of the pipe. or would it simply not amplify that section of sound, and as such sound a bit crap?
The answer is no... but you are on to something important, and indeed there is a part of the pipe where the pressure needs to be relieved for the high frequencies. I have never heard this mentioned online about Voigt pipes, my mentor came up with the idea of how to deal with the issue. I'll dedicate a video to this answer. ;)
i picked up an old(90's-2000's) amplifier to fix up. its the first "old" amp ive had since owning a few a decade ago. and teah the midrange wasnt very present with it. i know back then it would have been an amp that had some life and heft to it, but it sounds anemic in the mids. did a little research and that could possibly be due to the caps being just old and a bit past it. 30year range is replacement age. so i bought new caps..but i havent fitted yet due to some potentially destructive glue they used on them. for sure it doesnt sound like it should, it makes sense that it could be the caps given its solid state, not much else that would slowly go wrong with those, chips just stop working generaly. so im wondering..how old is your amp?
Superb question about amplifier life & when to upgrade caps! I have several amps, my Ampex-es are 60+ years old and my SETs are a little over 20. I'd say after 20 years the caps are definitively ready to be changed. Even though they still work ookay (most of them), but their sound is massively degraded compared to how it was when amp was new. I will dedicate a few videos on this, as today the new capacitor technology allows to have caps that live longer than we do and still be healthy as new....
!["สนธิ" ห่วงมีขบวนการปกป้อง "ทนายตั้ม" : [THE MESSAGE]](http://i.ytimg.com/vi/2GQNp3EoMc0/mqdefault.jpg)
Thanks so much for the response Janos! After spending most of yesterday switching out amps and preamps, I finally came to a magical combination! When you mentioned the negative feedback being a problem it all made sense too. I first tried the pipes with a class A amp. Sound was terrible! Amp has lots of feedback…. Tried several more solid states ( I do not have a tube amp) with different preamps with more frustration when I came up with one more combo. Used my Schiit Valhalla 2 as a preamp and ran that to two heavily modded Aiyima A07’s running as mono blocks. Sound was so good I spent the rest of the night listening in amazement. Brought my wife down to listen and she was shocked too, said it sounded so much better than earlier listening trials. You nailed it Janos, the pipes don’t like certain amps. Thanks again for all your help and knowledge. These pipes ROCK!
Wonderful!!! I'm so glad that it worked out so well. :)
Hi Janos it's Greg from Cube. Thanks for the great video as always ;)
I'd add one more thing about the midrange balance. Fullrange drivers in Open Baffle have naturally louder volume of the mindrange than in any cabinet. Since the Bass depends on the cabinet and OB cancel the bass, that unless supplemented with additional bass drivers will make the midrange louder when it comes to balance itself. Additionally high frequencies are generated by the fullrange drivers from the front side of the cone and the midrange since in OB its not absorbed by the cabinet is propagated both ways from the front and the back of the cone making the midrange 6db louder than in any cabinet. Hence the difference. The Voigt Pipe is a great option for a cabinet for a Fullrange driver and it's still a compromise like all cabinets types and Open Baffles. However with any 8-10 inch drivers I'd go for a VP cabinet over OB if additional bass is not added to the OB ;)
Thanks for your input Greg, vey useful info.
Thank you Greg for the superb overview! Indeed, that midrange boost gives the OBs a lot of fantastic charm. Some music just sounds the best on them. Somehow Led Zeppelin and King Crimson sounds to me the best on OB... Indeed, I concur with you, VP are more versatile with the more extended bass compared to OB with a 8-10in driver. Happy Easter Greg! Janos
"If you have solid state amps, God bless you and good luck" 🤣🤣🤣
😂
Amazing you can help troubleshoot from description. Lots of awesome info in this video. 👍
Hi Janos, that is a great video and well put together.
Hello Janos. Would it make sense to use a two-way design in Voigt pipes? The lower frequencies can be fine tuned by the shape, size, and mouth opening of the cabinet while the midrange and high frequencies contribution could be fined tuned by the crossover (and the choice of tweeter and woofer).
How much stuffing does an Altec A5 needs .I have built short flare horns fro m a block of joined MDF sheets.
Try without any, and then add a progressively more and see how it changes. My experience is that stuffing is customization, and is a powerful means to get the balance between room / speakers / amp right. Feel free to find the right amount, there's no set amount that's guaranteed best.
janos, would there be anything to adding a smaller port halfway along the pipe at the upper section? allowing those higher frequency's to escape a bit before being merged into the lower frequencies at the bottom of the pipe. or would it simply not amplify that section of sound, and as such sound a bit crap?
The answer is no... but you are on to something important, and indeed there is a part of the pipe where the pressure needs to be relieved for the high frequencies. I have never heard this mentioned online about Voigt pipes, my mentor came up with the idea of how to deal with the issue. I'll dedicate a video to this answer. ;)
i picked up an old(90's-2000's) amplifier to fix up.
its the first "old" amp ive had since owning a few a decade ago. and teah the midrange wasnt very present with it. i know back then it would have been an amp that had some life and heft to it, but it sounds anemic in the mids.
did a little research and that could possibly be due to the caps being just old and a bit past it. 30year range is replacement age.
so i bought new caps..but i havent fitted yet due to some potentially destructive glue they used on them. for sure it doesnt sound like it should, it makes sense that it could be the caps given its solid state, not much else that would slowly go wrong with those, chips just stop working generaly.
so im wondering..how old is your amp?
Superb question about amplifier life & when to upgrade caps! I have several amps, my Ampex-es are 60+ years old and my SETs are a little over 20. I'd say after 20 years the caps are definitively ready to be changed. Even though they still work ookay (most of them), but their sound is massively degraded compared to how it was when amp was new. I will dedicate a few videos on this, as today the new capacitor technology allows to have caps that live longer than we do and still be healthy as new....
Why not use a baffelstep filter?
Seems like too much poly filling.
Get a graphic eq.