Zalytron had a rather large radius on their cabinets. No clue what that radius actually was. Anyone?
Amir at ASR points out where the rounding might have an effect. I know ASR is controversial, but it seems pretty silly to downplay measurements, even if you think they aren't the whole story. Notice his note at the bottom.
https://www.audiosciencereview.com/...chano23-open-source-diy-speaker-review.54066/
https://www.audiosciencereview.com/...chano23-open-source-diy-speaker-review.54066/
As I progress the Halcyon Speaker design and Madi sound Kit has arrived I have but one issue. The kit did not have Sonotubes - which might not be an issue in the USA - but 200mm Sontube/Formatube is not readily available outside of the USA it so seems. I am thinking of constructing the wave guide out of MDF! Any thoughts?
That sucks! The Sonotubes never came in the kits. They come in slightly different diameters because they were shipped nested inside each other. What you were supposed to was go down to Home Depot, with the dimensions, and pick a tube that closely meets the correct diameter. Mine was a little larger than the cavity width, so I had to force it in, creating a little distortion in the round shape of the tube.
I kept my extra tubing for a few years and just threw it out recently. Sorry, I could have sent it to you. If you are willing to pay the shipping, send me the dimensions you need and I’ll go get one and cut it down to a little longer than you need and ship it to you. I’ll try to get the next larger size also to add some extra crush protection. Not ideal, but a legit option.
Didn’t the wave guides come with the kit? i thought they were pretty standard parts.
I kept my extra tubing for a few years and just threw it out recently. Sorry, I could have sent it to you. If you are willing to pay the shipping, send me the dimensions you need and I’ll go get one and cut it down to a little longer than you need and ship it to you. I’ll try to get the next larger size also to add some extra crush protection. Not ideal, but a legit option.
Didn’t the wave guides come with the kit? i thought they were pretty standard parts.
Alan, Thanks for the offer. How amazing this community really is..... and this offer from the other side of the planet. (It is the other side of the planet thing that really blows my mind!). When my forbears came to Australia in 1863 - it took them 6 months and mail was at best 13 months return. In todays world - that could be 0.5 Light Years away!
But I digress. No, the tube did not come in the kit and I did not think this would be an issue. I have found 250mm in Australia - BUT - not in Brisbane and they won't ship. I was over in North America recently and could have sourced then.......
Any thoughts on creating waves guide using MDF - seems like a reasonable non-resonant option. Labour is pretty cheap in Cambodia and it would only add ~~8kg to the overall mass.
But I digress. No, the tube did not come in the kit and I did not think this would be an issue. I have found 250mm in Australia - BUT - not in Brisbane and they won't ship. I was over in North America recently and could have sourced then.......
Any thoughts on creating waves guide using MDF - seems like a reasonable non-resonant option. Labour is pretty cheap in Cambodia and it would only add ~~8kg to the overall mass.
I suspect that the best material would be MDF. There would be 28 laminated elements per enclosure - which is not a particular issue.
I figure the midTL would be better if it was heavily tapered. Make a 10:1 midTL about the same volume as the sonotube. This is an example:
Doing so should improve one of the shortcomings of the design. The other would be to figure out how to get the woofers closer to the midTweeter.
And why are you using MDF instead of quality plywood?
dave
People say it will ring, but it will ring at frequencies well up above where those would get excitedby the music.
dave
Could use plywood - but none commercially available here. As an Alternative I can manufacture plywood using local timbers - but doubt that it will make much difference and will be more expensive.
jmenzies,
That's the beauty of DIY - you can make to with what you have... if no commercially available plywood at your place then it should be ok to build with MDF; for the front baffle perhaps consider 1" material (instead of 3/4"), so that you can accommodate the rebate/rabbet for flush-mounting the drivers. This can be achieved by using 1" MDF or adding a 1/4" layer on top of 3/4" material.
Your question regarding resonance of the PVC plastic pipe for the mid-tweet enclosure - the Linkwitz LX Mini also uses PVC pipes of the bass enclosure and mids, so it should work for you in this application.
That's the beauty of DIY - you can make to with what you have... if no commercially available plywood at your place then it should be ok to build with MDF; for the front baffle perhaps consider 1" material (instead of 3/4"), so that you can accommodate the rebate/rabbet for flush-mounting the drivers. This can be achieved by using 1" MDF or adding a 1/4" layer on top of 3/4" material.
Your question regarding resonance of the PVC plastic pipe for the mid-tweet enclosure - the Linkwitz LX Mini also uses PVC pipes of the bass enclosure and mids, so it should work for you in this application.
Hi all,
I have seen in many treads that properly teasing the filling stuff takes hours. I will have to do that next month. Can someone explain how to do it / why it takes so long.
Excuse my ignorance,
Walter
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The poly stuff wants to stick together. You grab a chunk and pull it apart until it is well teased out. It takes time because, in a box this big, there is ALOT of it. Some stuff, like Acoustastuff, is harder because it has littlebarbs that hold the fibers together.
So liek walking 10 km it takes some time.
dave
So liek walking 10 km it takes some time.
dave
I just finished the Halcyons today. Acousta stuff not done yet.
They produce bass, lots of bass! More air, bigger sound stage, effortless, it plays loud.
If in the future, i would prefer less bass, what are my options? Putting some sort of absorbant inside the transmission line?
As for now: WOW!
Walter
They produce bass, lots of bass! More air, bigger sound stage, effortless, it plays loud.
If in the future, i would prefer less bass, what are my options? Putting some sort of absorbant inside the transmission line?
As for now: WOW!
Walter
The Acousta stuff manages bass, but here’s your chance to learn from our mistakes. Start with a modest amount in each speaker (well-teased per above) and keep adding incrementally until you are happy. I, and others, put way too much in before we figured out the right amount. You want enough to tame the bass to your liking, but not so much that it gets mushy or boomy.
Put the acoustastuff in. It is an integral part of the tline. Your bass section will be producing a whole lot of unwanted resonances.
dave