Does tapped horn behave same as bass reflex ports?

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   So im interested in learning about tapped horns. From what I understand, the horn length is a quarter of the frequency they are designed to handle well. If the horn impact the sound waves just like a port in a bass reflex design, then the usable frequency response must me very narrow. Is horn different from ports? If so, what makes them different? What does a 1/4 wavelength do different than a small port, tuned to the same frequency? 

Edited by 0krizia - 17 October 2022 at 10:26am

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0krizia Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 15 February 2016 Location: norway Status: Offline Points: 79	Post Options Post Reply Quote 0krizia Report Post Thanks(0) Quote Reply Topic: Does tapped horn behave same as bass reflex ports? Posted: 17 October 2022 at 10:26am
	So im interested in learning about tapped horns. From what I understand, the horn length is a quarter of the frequency they are designed to handle well. If the horn impact the sound waves just like a port in a bass reflex design, then the usable frequency response must me very narrow. Is horn different from ports? If so, what makes them different? What does a 1/4 wavelength do different than a small port, tuned to the same frequency? Edited by 0krizia - 17 October 2022 at 10:26am

0krizia Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 15 February 2016 Location: norway Status: Offline Points: 79	Post Options Post Reply Quote 0krizia Report Post Thanks(0) Quote Reply Posted: 17 October 2022 at 4:24pm
	Is the usable frequency response of tapped horn wider than the frequency response of a normal bassreflex port? I might be bad at googling, but I have yet to find any good Info on this matter, or.. well… I have found some articles about horns but once I see complex math equations I tend to back of and look for something simpler to read.

carlosdelondres Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 21 June 2012 Location: London Status: Offline Points: 243	Post Options Post Reply Quote carlosdelondres Report Post Thanks(0) Quote Reply Posted: 17 October 2022 at 5:30pm
	You could do worse than start with this thread: https://www.diyaudio.com/community/threads/evolution-of-the-tapped-horn.135879/ Note the author of post #5 Lots more stuff out there of course.

toastyghost Members Profile Send Private Message Find Members Posts Add to Buddy List The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920	Post Options Post Reply Quote toastyghost Report Post Thanks(0) Quote Reply Posted: 17 October 2022 at 9:26pm
	I'd first begin with the basics of designs based on quarter wave propagation: http://quarter-wave.com/ Tons of stuff here which covers most bases, especially if you read it in order.

0krizia Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 15 February 2016 Location: norway Status: Offline Points: 79	Post Options Post Reply Quote 0krizia Report Post Thanks(0) Quote Reply Posted: 18 October 2022 at 5:30am
	Thank you guys.

Augusts Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 January 2017 Status: Offline Points: 180	Post Options Post Reply Quote Augusts Report Post Thanks(0) Quote Reply Posted: 18 October 2022 at 3:41pm
	From my experience, tapped horns and bass reflex have different dispersion in smaller rooms - BR fills a smaller room nicely but TH has more of a "throw"

0krizia Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 15 February 2016 Location: norway Status: Offline Points: 79	Post Options Post Reply Quote 0krizia Report Post Thanks(0) Quote Reply Posted: 19 October 2022 at 11:12am
	How can one soundsource make soundwaves behave differently than another soundsource? Soundwaves behavior should follow the laws of physics regardless of soundsource?

Xoc1 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 15 October 2012 Location: Devon UK Status: Offline Points: 397	Post Options Post Reply Quote Xoc1 Report Post Thanks(0) Quote Reply Posted: 19 October 2022 at 1:14pm
	Generally for a chosen driver an optimal tapped horn will be bigger in volume than an optimal bass reflex cabinet. Unsurprisingly the tapped horn being bigger is also louder - Being louder is often referred to as 'Throw'

Jo bg Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 08 March 2017 Status: Offline Points: 552	Post Options Post Reply Quote Jo bg Report Post Thanks(0) Quote Reply Posted: 19 October 2022 at 5:38pm
	Danley patents are very enlightening.

Augusts Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 January 2017 Status: Offline Points: 180	Post Options Post Reply Quote Augusts Report Post Thanks(0) Quote Reply Posted: 24 December 2022 at 9:54am
	We tried playing different sine waves in about a 70m2 and the TH had more spots of cancellation that BR. I dono. just saying, thats my experience, maybe its an illusion...

Augusts Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 January 2017 Status: Offline Points: 180	Post Options Post Reply Quote Augusts Report Post Thanks(0) Quote Reply Posted: 24 December 2022 at 9:56am
	Horns usually also do not work well in small rooms. We had a party in a 30m2 rooms and we turned the FLH facing the wall, then it worked great

Sypa Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 21 February 2013 Location: Croatia Status: Offline Points: 921	Post Options Post Reply Quote Sypa Report Post Thanks(0) Quote Reply Posted: 24 December 2022 at 12:36pm
	Have they been volume matched ? Maybe the TH excites the room modes more simply because of loudness. Also maybe it was peaky exactly in the room mode frequency . I mean I also witnessed this with reflex really filling up a room nicely like it's contained much more within it and pretty even response all around.