moray james Posted October 5, 2016 Share Posted October 5, 2016 http://www.ln271828.net/hornsys.htm also bt01.pdf Quote Link to comment Share on other sites More sharing options...
Schu Posted October 5, 2016 Share Posted October 5, 2016 Whos blog is that? Its an interesting collection of thoughts and opions... Quote Link to comment Share on other sites More sharing options...
DizRotus Posted October 5, 2016 Share Posted October 5, 2016 Start at home page. Quote Link to comment Share on other sites More sharing options...
Marvel Posted October 5, 2016 Share Posted October 5, 2016 He has a couple of pages about meeting PWK. I can't find the name of the site owner anywhere... Quote Link to comment Share on other sites More sharing options...
moray james Posted October 5, 2016 Author Share Posted October 5, 2016 his name is Robert. with so many Belle builds and interest these days I thought this would be of interest. Big but powerful. The Ciare design is the way to build a doghouse/divider if you want the wave to integrate you need to bring the doghouse to the end of the horn and make the horn as long as possible. Quote Link to comment Share on other sites More sharing options...
karlson3 Posted October 6, 2016 Share Posted October 6, 2016 I wonder if Belle would scale in the other direction with usable results as a midbass? - say 0.8 or a bit larger - use 12pe32 or similar Quote Link to comment Share on other sites More sharing options...
moray james Posted October 6, 2016 Author Share Posted October 6, 2016 that's about what a Belle (or LaScala) is now it needs to be crossed at 80 - 90 Hz to a sub. Quote Link to comment Share on other sites More sharing options...
JL Sargent Posted October 6, 2016 Share Posted October 6, 2016 Interesting. Never seen that before. Quote Link to comment Share on other sites More sharing options...
karlson3 Posted October 6, 2016 Share Posted October 6, 2016 scaled to 1.2:1 - there's still not much 1/4 wave path - rear chamber grows to ~100 liters = too large for sealed 15" speaker - put a couple of ports, use an 18 and it would be close to the old JBL 18" W-bin - It would be helpful for "Robert" to post the plan (hornresp says 240 liter airspace for the scaled Belle - if I did it right) M151 in University Classic 1 Pi 1 watt (hornresp says 400 liter airspace for the horn) Quote Link to comment Share on other sites More sharing options...
pzannucci Posted October 6, 2016 Share Posted October 6, 2016 I built a cross between a Belle and La Scala a long time ago using Frazier components. Due to the shorter path of the horn, I used all the available volume of the box to be able to include a large surface area port that was quite long. If you want any reasonable bass without supplementing with a sub, porting is a requirement to provide at least some low bass. Quote Link to comment Share on other sites More sharing options...
avguytx Posted October 6, 2016 Share Posted October 6, 2016 Am I missing where the dimensions of the Belle build design are? Or is that a more in-depth search? Quote Link to comment Share on other sites More sharing options...
moray james Posted October 6, 2016 Author Share Posted October 6, 2016 (edited) Robert's Belle was about the size of a Peavey FH1. I have written to Robert asking how he managed the low response. I agree with Peter so far as reflex loading the bass horn goes. The Ciare design (link above) is a very solid one to go by. Comment from Robert on his Belle. " My Belles didn't go down to 34 hz; the corner horns did. The Belles unloaded at about 45hz. The horn was about 36" long and since it was operating into pi steradians, the mouth area could be quartered. (4pi steradians is a sphere.) Below that point the system begins to act like a direct radiator. Edited October 7, 2016 by moray james additional info in form of comment Quote Link to comment Share on other sites More sharing options...
karlson3 Posted October 6, 2016 Share Posted October 6, 2016 here's my FH1 outdoors - I really prefer a Karlson K12 topped with K-tube to FH1 - of course the midhorn presentation is much different than a 12" cone in a cavity. (If you use a little Karlson with a woofer - pick a Kappa12a - give it some real power - don't monkey with flea power) Aqua trace = microphone laying on the ground. Green trace = mic at cabinet center height and around 30 degrees off horizontal axis. Quote Link to comment Share on other sites More sharing options...
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