60 degree quite compact 3 way Synergy horn

Curiosity and wanting to make something got me into looking at the feasibility of a 60 degree Synergy horn.

This would be purely for Hifi volume listening / Home Theatre use.

Using 2 x 8" LF drivers - Faital 8PR200s (as the SM60F) or Eminence Beta 8As (I know I like the Eminence Kappa 12A sound, but don't know if that counts for anything, but they are cheaper).. or plenty of other 8" drivers.

For MF and HF - instead of going coaxial, how about a 2.5" or 3" (if it would squeeze on), sealed back paper cone driver pair, or even 4 of?

There are plenty of 100Hz to too more than plenty high small drivers.
Peerless do a closed back one that's looks good.
Dayton and others do too.

Then on HF my trusty Vitavox S2 compression drivers.

I know I like the S2 sound - already used them on Tractrix and Le Cléac'h horns and have them currently on the SH50-alikes I made, after trying and not finding the BMS4550s to my taste.

I've been measuring up and jiggling a to scale'ish plan drawing.

Could be done with similar compact 530mm square flare as the SM60F.

I've not finalised the tap and port placings yet, but something like this.

Simple drawing for websites.PNG


What do the Synergy builders reckon?
Method or madness?
 
diyAudio Moderator
Joined 2008
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60 degrees is a nice angle in theory. You may end up with a slightly longer waveguide and wider mouth for the same lower frequency compared to wider. The range of a waveguide of this size might be coverable by the average 1" CD, so the benefits you see here might be in the area of the upper cross.