twistedcrankcammer Posted November 11, 2015 Share Posted November 11, 2015 Carl, You are correct, I should not have thread Crapped. Feel free to move it if you will. BUT... You are wrong in that it is too short of a time for the Human brain to perceive (You really need to listen and hear it in person)and it wouldn't matter if the wave form is in phase, that only is important to the amount of output the sub will make. You will still be hearing a note decaying from the second harmonic that will be time miss matched time wise with the bottom end of the sub that you will not be able to correct for electronically. My guess is the very best we could do is a split in time of the first and second signals. Roger Quote Link to comment Share on other sites More sharing options...
jason str Posted November 11, 2015 Share Posted November 11, 2015 If we were to build a compression type driver sub like that of the Klipschorn or La Scala that is long enough to reproduce the frequencies down to say 15 Hz and produce a lot of output, then these are the qualities I am looking for! The Cinema F-20 is a front loaded horn (non tapped if you will) that will reproduce bass down to 22 Hz. It's not 15 Hz as you've cited wanting but it's pretty darn good. You could build a 15 Hz FLH but it'd be a big boy for sure. Not front loaded horn. 1/4 wavelength folded bass horn would be the proper term. The Table Tuba is actually similar to a tapped horn but the driver is not in the horn path like the others i have seen. 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 You are correct, I should not have thread Crapped. Feel free to move it if you will. No problem. Here's a 16Hz Front loaded horn. This should be what you're looking for. See how I steered us back? LOL http://www.avsforum.com/forum/155-diy-speakers-subs/1485120-submaximus-large-front-loaded-horn-uxl18-stereo-integrity-ht-18-a.html 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 Not front loaded horn. 1/4 wavelength folded bass horn would be the proper term. FLH is easier to type and is commonly used to refer to these type horns The Table Tuba is actually similar to a tapped horn but the driver is not in the horn path like the others i have seen. To me its more like a FLH (I mean 1/4 wavelength folded bass horn ) with an open driver chamber. I've never seen a TH without the driver in the horn path. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 You are wrong in that it is too short of a time for the Human brain to perceive Which tapped horn subs have you been listening to Rog? Quote Link to comment Share on other sites More sharing options...
jason str Posted November 11, 2015 Share Posted November 11, 2015 (edited) Not front loaded horn. 1/4 wavelength folded bass horn would be the proper term. FLH is easier to type and is commonly used to refer to these type horns The Table Tuba is actually similar to a tapped horn but the driver is not in the horn path like the others i have seen. To me its more like a FLH (I mean 1/4 wavelength folded bass horn ) with an open driver chamber. I've never seen a TH without the driver in the horn path. Sorry, front loaded horn sounds so generic, technically yes but so are most if not all of the DIY tapped horns and i figured it could lead to confusion. You own one Carl i thought, it is a type of tapped horn just a different layout. That is why the distortion figures are higher than the THT. Edit: Tapped horns and the Table Tuba are rear loaded horns not front loaded as previously mentioned. Edited December 13, 2015 by jason str Quote Link to comment Share on other sites More sharing options...
jason str Posted November 11, 2015 Share Posted November 11, 2015 We should keep the Tapped horn discussion out of this thread as the THT is fully horn loaded so not to confuse. The two are very different. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 You own one Carl i thought, it is a type of tapped horn just a different layout. That's correct. I thought that to be considered a tapped horn, the driver HAD to be in the horn path. 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 We should keep the Tapped horn discussion out of this thread as the THT is fully horn loaded so not to confuse. The two are very different. Not a problem. Quote Link to comment Share on other sites More sharing options...
jason str Posted November 11, 2015 Share Posted November 11, 2015 You own one Carl i thought, it is a type of tapped horn just a different layout. That's correct. I thought that to be considered a tapped horn, the driver HAD to be in the horn path. Same concept, different layout. Not sure if BFM considers it a tapped horn or not but feel free to ask on his forum if it matters to anybody. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 Here's a definition of a tapped horn from cyclecamper at diyaudio Tapped horns...well...in accessible terms I'll freely invent and use wrong...the general idea starts with a nearly typical bass horn, where the driver's 'primary" output "works" into a small space with a small opening which acts as an acoustical low-pass filter and defines the beginning of the horn throat. As the horn continues expanding along its path, it folds perhaps once or more times so that approx. the 1/2 wavelength distance along the horn the horrn wall is again adjacent to the driver. At that point the opposite-side "secondary" reverse-phase wave of the driver is now IN-phase with the "primary" output which has been delayed by a half-wavelength. In a conventional bass horn, the output of one side of the driver powers the horn and the opposite side of the driver is absorbed in a closed box. In a tapped horn, useful output is derived from both sides of the driver and added in-phase. Somewhat like the port in a bass-reflex reverses phase of the secondaray back-wave secondary output so that it adds supportively, in a TH the horn distance to the 'tap' reverses the phase of the front-wave primary output so the 'tap' adds supportively. Makes intuitive sense, if you consider the delay and phase-change as the sound travels along the horn. I have not thought about exactly how much extra output you get from the technique, but it's significant. (back to me) From what I understand the open driver chamber of a Table Tuba is more like a port in a conventional sub that's not designed specifically to be in phase with the horn output like a tapped horn. I've never heard BFM refer to this as a derivative of a tapped horn but I haven't spent time on his site in quite a while. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 Scott, please let me know if this is of no interest to you. Quote Link to comment Share on other sites More sharing options...
jason str Posted November 11, 2015 Share Posted November 11, 2015 Found something. Link Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 LOL "sort of". Good article BTW, thanks for posting. 1 Quote Link to comment Share on other sites More sharing options...
jason str Posted November 11, 2015 Share Posted November 11, 2015 Reading this explains all the above 60 Hz or so nastiness of all the DIY tapped horn models that everybody is building. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 11, 2015 Share Posted November 11, 2015 Yes, you can't cross them over as high as other configurations. 1 Quote Link to comment Share on other sites More sharing options...
SWL Posted November 12, 2015 Author Share Posted November 12, 2015 Scott, please let me know if this is of no interest to you. It's cool....keep em coming. Quote Link to comment Share on other sites More sharing options...
SWL Posted November 12, 2015 Author Share Posted November 12, 2015 What are you using to power it? Behringer EP4000. Quote Link to comment Share on other sites More sharing options...
Rowan611 Posted November 12, 2015 Share Posted November 12, 2015 What are you using to power it? Behringer EP4000.That's a lot of power for a THT. Sent from my HTC One_M8 using Tapatalk Quote Link to comment Share on other sites More sharing options...
SWL Posted November 12, 2015 Author Share Posted November 12, 2015 That's a lot of power for a THT. I know it's not needed but I already had two of these amps handy. They're working out very well. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.