Hey all - I recently had the opportunity to hear the Pearl Acoustics Sibelius and decided I wanted to build some speakers based on the cloned designs I've seen here on the site. I have decent woodworking skills, and started right in with building the cabinets - and then realized it was going to be a bit more difficult to get the 10.3 drivers than I thought. I have a pair of Alpair 11 MS gen 2 drivers on hand, and am looking for some thoughts or recommendations. I'm not an expert when it comes to the engineering or physics, but I know there are designs very specific to the Mark Audio drivers. I was curious if it's even worth attempting to put the 11 MS into the Sibelius enclosures I've been working on, or if there are obvious reason's it's not even worth giving it a try and just try to find the 10.3. If not, I plan to just stick with one of the tried and true designs I've seen here (Pensil, Sea Stack, Water Buffalo). Would also love any general opinions about the difference in sound between those 3 designs.
Thanks in advance for any thoughts or info!
Thanks in advance for any thoughts or info!
Pretty sure a Sibelius would need a re-design for the 11MS. I have no data to back this up thou, and no way at present to model a TL style enclosure. Just looking at the TS values and a comparo in Winisd.
I thought the Sea Stack with 11MS was great. That's the only enclosure I've heard with the 11MS. I'd be very tempted to try them in FHXL boxes.
jeff
I thought the Sea Stack with 11MS was great. That's the only enclosure I've heard with the 11MS. I'd be very tempted to try them in FHXL boxes.
jeff
No.
The A11ms and A10x that Harley uses are beven further apart in terms of load than A10.2 or 3 in Sibelius copy.
dave
The A11ms and A10x that Harley uses are beven further apart in terms of load than A10.2 or 3 in Sibelius copy.
dave
many thanks for the replies - the Sea Stack it is! dave where are you located? we're pretty close to Montreal - but I'm guessing you're near Toronto?
Is an over-engineered Pensil a good choice? You could take the Sibelius approach and make all the walls from thick wood (or ply), keep the internals the same?
I ended up going with 2 designs - the Sea Stack and the Pensils (I was able to use the wood I had already cut for the Sibelius copy). The boxes are pretty much together, and just have a few questions.
1. For the bracing is it recommended to go with both horizonal and vertical? I saw that on the Pensil 12 design, but wasn't sure if I needed/should do that on the ones I'm making.
2. On the Sea Stack is there any noticeable difference based on the shape of the port? If I go with the 3 inch circle, should I recess the bracing where it would cross it?
3. I have a bunch of rock wool left over from a home project. Can I use that as damping material on the internal surfaces? If so, how thick should it be?
4. For the removeable back is it worth lining the braces with think felt or something to help with vibrations, or will it being tightly screwed work well enough?
Thanks in advance for any insight - I'm having a hard time not just putting the drivers in already!
1. For the bracing is it recommended to go with both horizonal and vertical? I saw that on the Pensil 12 design, but wasn't sure if I needed/should do that on the ones I'm making.
2. On the Sea Stack is there any noticeable difference based on the shape of the port? If I go with the 3 inch circle, should I recess the bracing where it would cross it?
3. I have a bunch of rock wool left over from a home project. Can I use that as damping material on the internal surfaces? If so, how thick should it be?
4. For the removeable back is it worth lining the braces with think felt or something to help with vibrations, or will it being tightly screwed work well enough?
Thanks in advance for any insight - I'm having a hard time not just putting the drivers in already!
Keep it all vertical.
Adding horizontal bracing breaks a prime rule/generalization for bracing: the aspect ratio of the subpanels created by the brace should be greater than the panle being braced. Corallary: and ideally the subpanels will have different — slightly at least.
Based on Tappan’s work shown in the AES Journal.
dave
I think I asked the wrong question - do I need braces that run horizontal but perpendicular to each other like the 2 in the diagram for the Pensil 12? If so, does the height of the smaller ones matter?
:check:
A horizontal brace woukd be parallel to the bottom of the box. And in both these ML-TLs the braces should be in he same direction as the line/eigen mode..
dave
A horizontal brace woukd be parallel to the bottom of the box. And in both these ML-TLs the braces should be in he same direction as the line/eigen mode..
dave