I would like to build great horns for the bass as deep as possible and I use 4 woofer altec 416th.
Romy the Cat wrote:audiofilofine, you need to form a question in a format that would indicate you do the your do some homework. To bulb or even to design 20Hz horn is complex task and it usually made to the specifics of the given circumstances. As rule to use properly the 20hz horn even more complicated then to make it. So, before fantasizing about 20 Hz horns I would like to know that you are serious in your interest and have something to back up your interest.Rgs, Romy the Cat
Romy the Cat wrote:audiofilofine, you need to examine your room and your entire domestic environment in order to see where and how you might make your pair of bass horns. Also, if they will be 20Hz horn then are you planning to use next chelas up as Altec MF driver? The 806 driver is 700Hz tweeter. I do not believe it makes sense and if you planning to so then you need to do more home thinking. Also, why it shall be 20Hz horn why not 25Hz horn? Anyhow, audiofilofine, please do not take it to personally but until I see a well laid out plan of actions from your I do not think that it worth to talks about it. 90% of all answers is an ability to ask proper questions. I do not think that you so far asked yourself proper questions.The Cat
Horn Savant wrote:Before experimenting with the Hi power Electrostatic module, I used 416's in my large corner horn. They sounded extraordinary (ran with inf baffle to basementand made me realize how much Altec/JBL enclosures suck with their poor deep bassperformance
Horn Savant wrote:Window needs to be sealed with non resonant baffle. 416's sound spectacular in inf baffle ! May be possible to horn load to a corner using standardgood design precedents with good throat coupling like my previous pictureThis picture: Back of 416's in basement
Horn Savant wrote:Final exit ~ 1M x 2M crn loaded (yielding 1/4 given mouth cut-off frequency)With 416's bass can be devastatingly spectacular !The general public have no concept of the efficacy of large bass horns
Romy the Cat wrote:Audiofilofine, if you do not mind then can you name you posts more identifiably and not with the same name? The Cat
audiofilofine wrote: Romy the Cat wrote:Audiofilofine, if you do not mind then can you name you posts more identifiably and not with the same name? The Cat???????????plan window on 4,5 mt sideand photo
photohttp://2.bp.blogspot.com/_KH-wqciCnKk/Sj8h92JJHAI/AAAAAAAAAp4/kkazY0gHdco/s1600-h/DSCI0126.JPGhttp://2.bp.blogspot.com/_KH-wqciCnKk/Sj8h92JJHAI/AAAAAAAAAp4/kkazY0gHdco/s1600-h/DSCI0126.JPGhttp://1.bp.blogspot.com/_KH-wqciCnKk/SjebP6pUnXI/AAAAAAAAAmI/WopfpeXkqy4/s1600-h/DSCI0009.JPGhttp://3.bp.blogspot.com/_KH-wqciCnKk/Scqizd3p8YI/AAAAAAAAAbQ/KHAV9AERubU/s1600-h/DSCI0196.JPGhttp://2.bp.blogspot.com/_KH-wqciCnKk/ScqizKDxMBI/AAAAAAAAAbI/BLrV2a-Wy2s/s1600-h/DSCI0197.JPG
audiofilofine wrote: ???????????
audiofilofine wrote: photo of room
Romy the Cat wrote:. What was your resonant frequency after loading? The 416 are 25Hz drivers, after loading and with two drivers it might be deep in teens. From the picture it looks like you keep the back chamber of extra large space, or even wide open. Did you find in this situation that the cone is a bit “loose?”The Cat
audiofilofine wrote: Horn Savant wrote:Final exit ~ 1M x 2M crn loaded (yielding 1/4 given mouth cut-off frequency)With 416's bass can be devastatingly spectacular !The general public have no concept of the efficacy of large bass hornsthanks the woofers are on the floor? so I could implement them without problems. You can make a drawing of horn?
Horn Savant wrote: I think it's about the same as free-air resonance - backwave to entire basement. Precedent: pre-war theatre horns(open rear like Shearer/ERPI)(unlike post-war reflex tuned designs like Altec A4)(I don't like reflex boxes - did not like416 in Altec 620 box)that live with resonant amplitude rise. Cone control seems reasonable within moderate power limits. Modern movie/TVmixing has some massive deep low bass which could damage some drivers without subsonic hi-pass filter.
The KOSS Electrostatic unit was still installed , so I removed and checked resonance .The resonance was 136 HZ. I then tested it in horn assembly and the result was the same : 136 HZ. Appears to be rather poor throat coupling.But it was, as I suspected (in other thread ), outside its operating range < 80 HZ.I then tested the two 416's in free air and they were 28 HZ each. Then I tested them in thehorn - both drivers driven with signal and measured 23 HZ resonance. Better throat coupling- better than, say, a Shearer or Mirrophonic folded stacked "W". But, like these, probably more of a "waveguide" than true well coupled exponential loading. I think it's about the same as free-air resonance -
Horn Savant wrote: I then tested the two 416's in free air and they were 28 HZ each. Then I tested them in the horn - both drivers driven with signal and measured 23 HZ resonance. Better throat coupling - better than, say, a Shearer or Mirrophonic folded stacked "W". But, like these, probably more of a "waveguide" than true well coupled exponential loading.