Recommende Fostex backloaded horn project

[rho]

I'm thinking about building a fostex backoaded horn enclosure as a next speakerproject.
These 2 apeal to me most:
Fostex FE168Esigma backloaded horn
FE166E backloaded horn

I can't design this project myself (don't have time for that anymore). I would just like to do some nice woodwork and enjoy a nice full-range as a result.

Out of these 2, wich would you build and why?
Does one of these 2 need the recommended supertweeter to get a satisfying result?

[seanzozo]

According to common wisdom - The FE168 recommended is better than the FE-166 horn.

Other things I'd suggest
1) Austin A166 - http://homepage.mac.com/tlinespeaker...6Mk2-plans.pdf - IMHO - better than either of those, but slightly more complex in build. Planet 10 has no sims on the austin but my in-room measurements are here - Austin 166's in Austin
2) Planet 10's Hiro - http://www.frugal-horn.com/spawn.html - models well and should be easy to build.

Sean

[rho]

Thanks for the links. Your in room measurments look realy good to me. That makes me think about something. Does listening distance and roomsize influence the performance of such a horn alot? (besides the fact that the room is about the most important part of the set togehter with the speakers) I know that with a line aray it's better to increas the distance the bigger the arry gets. Is there such an effect with BLH's too? (listening distance <> mouth area ??)

The round version of the Austin would make a good looking speaker. Are there plans available with the dimensions?

Although the Hiro looks like a nice design, they don't appeal to me that much. (visualy) What about the Iris, using the Bruce plans and making it less wide? (as mentioned on the site)