Guest David H Posted January 31, 2010 Share Posted January 31, 2010 I took on this project out of pure curiousiy. Here is a 200Hz Tractrix horn using a 6 1/2 driver. I have Johnny 5 to thank for much of the labor due to a hand injury. Here is the BatHorn flair, in compison to my Fastrac Lascala. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 Build Pics. Maybe the designed will come in and comment. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 Pic 2 Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 Pic 3 Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 Driver Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 Back Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 Ready for testing. This is on "BIG @$$ TRACTRIX" Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 Ran some curves last night to see if the horn will make to 6k. These curves were done with a standard mic and no calibration file, my phantom power will be here next week for more accurate measurements. This is on axis no smoothing. There are unexplained humps below 200hz that are possibly caused by my heater or some other unknown source. Quote Link to comment Share on other sites More sharing options...
hklinker Posted January 31, 2010 Share Posted January 31, 2010 You should call it "Monstrix"![] Herb Quote Link to comment Share on other sites More sharing options...
hklinker Posted January 31, 2010 Share Posted January 31, 2010 You should call it the "Monstrix"![H] Herb PS Sorry bout the double post something squirrely goin on! Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 30 deg off axis no smoothing. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 30 deg off axis 6 octave smoothing. I apologise for the crued use of Real RTA, I have had it about a day, and am just starting to learn its abilities. Quote Link to comment Share on other sites More sharing options...
Marvel Posted January 31, 2010 Share Posted January 31, 2010 Is that a B&C 6PEV13? I've been looking at those for 3 1/2 years, thinking they would make a great mid driver. Very cool, Dave. How wide is the horn...[:|] Bruce Quote Link to comment Share on other sites More sharing options...
kevinmi Posted January 31, 2010 Share Posted January 31, 2010 That thing is huge! What size throat is that? Looks like you could stuff a cat through it Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 31, 2010 Share Posted January 31, 2010 It is a B&C and is a great mid driver. the Horn is 37 wide. The jury is still out on the horn, more testing should reveal its true nature. Quote Link to comment Share on other sites More sharing options...
Deang Posted January 31, 2010 Share Posted January 31, 2010 I think the curve speaks for itself -- excellent work Dave. Quote Link to comment Share on other sites More sharing options...
Bill H. Posted January 31, 2010 Share Posted January 31, 2010 Well you learned one thing........................ The Horn is a Huge......................BAT out of Hell.................[8-|] Quote Link to comment Share on other sites More sharing options...
jwc Posted January 31, 2010 Share Posted January 31, 2010 Outstanding. This cone loading is something that has been on my mind for awhile.... Beautiful work. Couple of questions..... How far away was the mic from the horn on the off axis curve? The FR is perfect to TRY on Khorn. You could XO at 300-400Hz and go out to the typical 5000-6000Hz. The thing is......what is the SPL? A good test would be to run the curve as you have done on axis......leave all the testing parameters the same and take the driver and driver box off the horn......then run the curve again with the driver the exact same distance away from the mic (performance of that driver in a sealed box). This would answer....what the "compression" is doing for the driver. If the spl only increased "a little"....may have to change the throat dimensions. This type of combo could offer "Possible" more midbass thwack for the Khorn. Of course...it has to sound good. The curve sure looks great.......I'm pleasantly suprised. Gothover.....you do great work with amazing speed. I love the quote: This is on "BIG @$$ TRACTRIX" jc Quote Link to comment Share on other sites More sharing options...
runandwin Posted January 31, 2010 Share Posted January 31, 2010 Boys, boys, boys....I do not approve! We do not have room for another pair of big @$$ anything in our storage or house. I'm already anticipating that our realtor will tell us that we need to get rid of the tractrix bass horns sitting next to the MWM top sections at the back corners of our basement.[] Quote Link to comment Share on other sites More sharing options...
mikebse2a3 Posted January 31, 2010 Share Posted January 31, 2010 Wow..! impressive work GotHover I might be wrong but I do believe the curves you posted for the on-axis and 30 degree off-axis are in error. They are identical in response which doesn't seem logical and I also noticed that their file name and time are identical. I'll be very interested to see more of the off-axis curves..! mike tn[Y] Quote Link to comment Share on other sites More sharing options...
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