Multiple Entry Horn - thoughts?

DIY
21

Amazing, thanks for Sharing

22

I’d see that video before but hadn’t watched it yet.

Tried to listen while troubleshooting a computer. No go. Kept turning to pay closer attention to the video. I’m going to have t set aside time to watch it. Seems like there is a lot of good content in there, even if I have already read the Hinson paper.

23

I’d been wondering if compression drivers, high end drivers or active crossover were necessary for MEH. I read Newell and Holland 2007 “Loudspeakers” horn chapter.

  • I think the active crossover requirement is being driven by the standing waves that get created in the horn due to unsmooth transitions causing pressure impedance mismatch that triggers reflections. Bill Waslo’s Synergy work is also using a passive crossover.
  • High end drivers feeding taps does not seem to be a requirement, especially given the taps functionally acoustically filter out higher order distortion. Though they may be required based on driver excursion limits similar to how a driver can rip itself apart inside a bandpass cabinet, but the listener won’t know it is creating nonlinear distortion until it physically breaks up.
  • Compression driver does not seem to be a requirement. Thought the DCX464 is a nice driver.

Searching “unity horn driver selection” rather than MEH or multiple-horn related led to a passive crossover “entry-level” build exercise by rkhunter on diyaudio: https://www.diyaudio.com/community/threads/proof-that-anyone-can-unity-horn.426515/. He is using Peerless by Tymphany XT25TG30-04 and 2 8 ohm Dayton TCP115 woofers. Not sure I’d call that a reference design, but it is definitely a different perspective.

This project is still in the investigation phase (probably will be for awhile, too many projects). Need to watch the video posted and then consider the ATH thread on horn design to see if there is a path that allows fewer standing waves.