This thread will follow my build of the Halcyon speakers, designed by Curt Campbell. I'm not sure if this is technically a F.A.S.T design, but I think it is. There is a single Alpair 10p and two SB Acoustics SB17 midwoofers. Curt described the design: "The Alpair is housed in a semi open back cylindrical enclosure, while the SB17's perform in individual transmission lines that are merged at the port in a mass loaded configuration"
Curt shared that one of his friends, a professional opera singer, preferred the Halcyon's to any of his other higher-end designs. This raises my already high expectations that this is going to be a fine speaker indeed. Strangely, other than Curt and Jim Holtz, I don't know of anybody who has heard them and I don't know how many pairs have been built. Madisound says they have sold several kits, but I haven't been able to find a build thread or any pictures of completed Halcyons other than the original test mules.
Bob Berner ([email protected]) made a terrific flat pack for the Halcyons. Everything fits perfectly and the BB plywood is very high quality. Bob is very helpful and prompt. From idea to delivery for a brand new design with no CAD drawings, Bob completed the whole process in just a few weeks. He is great to work with (he also built a FruglHorn XL kit for me) and I encourage anybody interested in a flat pack to contact him. He has good prices, great service, and a very supportive approach.
Here is Curt's website section on the Halcyons:
Speaker Design Works
This is the the only finished Halcyon I have seen images of:

Curt shared that one of his friends, a professional opera singer, preferred the Halcyon's to any of his other higher-end designs. This raises my already high expectations that this is going to be a fine speaker indeed. Strangely, other than Curt and Jim Holtz, I don't know of anybody who has heard them and I don't know how many pairs have been built. Madisound says they have sold several kits, but I haven't been able to find a build thread or any pictures of completed Halcyons other than the original test mules.
Bob Berner ([email protected]) made a terrific flat pack for the Halcyons. Everything fits perfectly and the BB plywood is very high quality. Bob is very helpful and prompt. From idea to delivery for a brand new design with no CAD drawings, Bob completed the whole process in just a few weeks. He is great to work with (he also built a FruglHorn XL kit for me) and I encourage anybody interested in a flat pack to contact him. He has good prices, great service, and a very supportive approach.
Here is Curt's website section on the Halcyons:
Speaker Design Works
This is the the only finished Halcyon I have seen images of:

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