Frugel-Horn XL for Alpair 10.3/10p, Fostex FF165wk, more

Apologies for brevity, but most of the house is ripped apart thanks to a 90 year old lead pipe finally deciding it didn't want to carry water.

They need different quantities (and even locations) of damping, so direct comparisons are difficult, though (unusually) both designs can run both drivers, albeit on different alignments. Silbury is high gain [very, with 11MS] so be prepared with a bag of dacron in case of need. This is good. The more gain the better -you can always get rid of what you don't need. 😉
 
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If I would try both speakers on both enclosures, how can I manage the need of rebate of the 10.3 vs no need of the 11MS?

So you would enhance the gain of the Silbury with the 11MS?

How can I understand where and how to place the dacron (I have sheep hairs actually).

Thanks,
Roberto
 
Is this not XL? The amount of damping you are using is that specified for FH3. FHXL uses about 2x as much.

dave
Bringing back a question about amount of polyfill. The quoted message from Dave suggests that the amount of polyfill should be 90g total per cabinet: 60g in the back and 30g in the front. Am I understanding the messages correctly?

If so, then it's extremely different from the recommendation from Stefan (KJF Audio), who recommends a total of 350g stuffing equally divided front and back:

I am in the process of adding the stuffing to the flat pack I bought from Stefan. Attaching a photo of what it looks like right now. Does this look about right or is that way too much? It shiuod be around 350g total.
 

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Right, I have a five minute window before they start in on the plastering again. As noted, I do not make any specific recommendations about 'should I use xyz'; however, since your FHXL is already cut for 11MS, then I'd use that for obvious reasons, and install 10.3 in Silbury. The 10.3 may have been around for longer but it's still an excellent driver of its size & type, and since it's a smaller unit, the extra efficiency provided by the larger horn is a good thing. It was designed predominantly for the 10 series with other units as options, so overall, a good combination of drivers / cabinets.
 
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60 g in the point, 0-80 g up front.
I've searched, but probably with the wrong words. I'm sorry if I'm asking something you explained many times.

What are the parameters to define the front damping?
EG: more/less grams, more/less density, more on top or bottom or uniform?
  1. an amp with more damping needs?
  2. muddy bass needs?
  3. other parameters that will affect the damping parameters?
Thanks in advance