DIY Synergy horn

[bwaslo]

No, Schroeder freq is not a cutoff, it is a frequency below which the response becomes dominated by standing wave modes in a room (and so a waveguide doesn't make much sense since directivity won't be much of an advantage anymore). A horn could get you some better sensitivity, if that's your goal, but it going to have to be either in a corner and/or huge to really do much down at frequencies you might consider to be "bass".

[Bigun]

well 'huge' is all subjective.

Macondo speakers from Romy the cat

These are Tractrix horns, single driver per horn. The largest one covers the upper base frequencies and goes low enough to cross-over to a sub. I have considered this option but the effort involved looks larger than the horn... one of those projects that you regret even starting

I thought a single horn, like the Synergy, looks like a much more practical option. But it's not a good option for me in this regard unless it goes low enough to cross over to a sub (and possible be useable even without a sub) or I still need another large box. I'm not necessarily afraid of making it fairly big like the one shown in the link. There will only be one - it's a mono project.

The constant directivity is a bonus, the more important benefit is that being a single horn it will be more practical to build it, install it and move it around compared to a multi-box option.

I'm still not sure what I'm missing here, before I discard the idea of a Synergy type horn I'd like to learn a bit more.

[AllenB]

A lot of the midrange bandwidths discussed around synergy horns wouldn't seem to get the most out of a compression driver in a home situation. It's really no big deal to have a 1" CD cross below 1kHz. Especially with the narrower horns discussed here. I'd personally prefer to see good pattern control to well below 500Hz, preferring to go down to f_schroeder and I'll gladly push the CD to make it all two-way.