D-MAN Posted July 5, 2006 Share Posted July 5, 2006 I resorted to the archaic... here's a pic. It however has a great effect. I'm using felt, of course. If you are experiencing "peaky" or "shrillness" give this a try before you go off the deep end. You will be suprized at the degree of control it can give you. DM Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted July 5, 2006 Share Posted July 5, 2006 Are there strips of the felt INSIDE the horn throat? Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 5, 2006 Author Share Posted July 5, 2006 Indeed, there are. But not exactly in the throat, per se, that kills the high end. Slightly outside, to influence the dispersion characteristics. That is the trick. Also use "removable" non-hardening adhesive, I'm using 3M 2 sided adhesive strips applied to the felt. That way, it is completely removable, non-marring, and non-permanent PLUS you can position the strips as needed repeatedly. DM Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted July 5, 2006 Share Posted July 5, 2006 D-Man, Is this pic the same horn in your avatar? You might have posted on this before, but I'm wondering the make and model of the horn. Looks very good. Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 5, 2006 Author Share Posted July 5, 2006 Yes, same horn. That's a P-Audio 4525 (400Hz Fc), 2" throat. I didn't have any problems with it until I switched to the BMS driver. The felt "mods" have tamed it down. Now it doesn't have any glare, and is a natural balance with good dispersion characteristics. I'm pretty happy with it FINALLY. It's cheap and so am I, although I would like to try a tractrix with a 2" throat like Jordan's. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted July 5, 2006 Share Posted July 5, 2006 Thanks D-Man. Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 5, 2006 Author Share Posted July 5, 2006 See the metal dust screen in the throat of the driver? I read that some recommend that you remove it. (Typically the screen is attached to the driver). That leaves a dust intrusion problem, but regular vacuuming can eliminate that (in a relatively clean environment) somewhat. Question is, is it worth doing? Have any of you guys tried this? I'm seriously thinking about it. DM Quote Link to comment Share on other sites More sharing options...
ZAKO Posted July 5, 2006 Share Posted July 5, 2006 I suggest not removing the dust screen. It should be renamed the spider screen. Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 5, 2006 Author Share Posted July 5, 2006 Nature is indeed relentless! If I can do it reversably, I'm thinking that I'm going to try it. DM Quote Link to comment Share on other sites More sharing options...
Guest " " Posted July 5, 2006 Share Posted July 5, 2006 Never tired it, but these folks mention it during their mod of a k-horn http://guerrillaaudio.com/store/bunker/klipschorn.html Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 5, 2006 Author Share Posted July 5, 2006 That's pretty good, all the mods in one fell swoop! I'll bet it did sound pretty good after all that. DM Quote Link to comment Share on other sites More sharing options...
Guest " " Posted July 5, 2006 Share Posted July 5, 2006 Good pic's and story line.... Quote Link to comment Share on other sites More sharing options...
3dzapper Posted July 6, 2006 Share Posted July 6, 2006 "It's cheap and so am I, although I would like to try a tractrix with a 2" throat like Jordan's." DM, I can loan you a pair of trachorns to try. The first pair I made. Not as pretty as Jordan's!-( The original Edgar design is for a 2" throat. I can make a rear plate, You will need to fab a mount for your BMSs. If you like them, like Jordan, you can build a pair with the information in Dr Edgar's "Speaker Builder" article and bendable birch ply. Or buy a pair from Al but, I think, he reduced the throat area a tad from Edgar's specs. I have one on top of a Belle right now. Not only is it out standing, it is outstanding. Rick Quote Link to comment Share on other sites More sharing options...
DizRotus Posted July 6, 2006 Share Posted July 6, 2006 Rick, You were going to send a poster board template. I'd be grateful and would reimburse you and/or pay it forward, whatever your pleasure. Thanks Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 6, 2006 Author Share Posted July 6, 2006 Rick, Thank you very much for that extremely kind offer. Without seeming to be ungrateful and overly picky, is it a 2" throat horn? I feel bad to even question it, but I'm concerned that the BMS coax driver (2" throat) would suffer in a smaller throat and not give a true indication of the capabilities of the tractrix horn. I feel bad about having any reservations in light of such an offer. Talk about looking a gift horse in the mouth! I appologize for my lack of good manners (and bad spelling). Dana Quote Link to comment Share on other sites More sharing options...
DrWho Posted July 6, 2006 Share Posted July 6, 2006 I didn't have any problems with it until I switched to the BMS driver. Interesting... Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 7, 2006 Author Share Posted July 7, 2006 The difference is that a good driver will highlight the deficiencies of a particular horn, where a less high-performance driver will not. The high-performance driver will take the horn to the edge of its operating envelope, so to speak. I would say that this is a matter of dynamic capability more than anything else. Also I would point out that the difference in SPL/sensitivity ratings between the two drivers in question is about 12db. Even when the BMS is severely attenuated, the difference in dynamic capability is very apparent to even the casual listener. But once heard, it's quite "addicting" for its realism. So the BMS drivers stay. That's a no-brainer. Had a buddy from high school come over and had a listen over the weekend. His response was "I've been to concerts that didn't sound this good!". From me, that wouldn't mean much, because I have been to lots of concerts that sounded BAD, but his point of view was that live music was "best" and that these are right up there with live music as a reference point. I thought it was interesting that he went to his experience with live music vs. comparing to other audio systems (like I would have), but he isn't an audiophile, so that makes sense, I guess, "you go with what you know". We were listening to the system at less than 1/3 of a watt per channel, which is comfortable but enough to fully "blossom". He didn't want it any louder. I took it as a great compliment. They DO sound good. Took along time to get here, though. DM Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 7, 2006 Author Share Posted July 7, 2006 Got a new camera, so been taking shots all over the place. Some are better than others. I'm running "flat" with no EQ on these. DM Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 7, 2006 Author Share Posted July 7, 2006 Current lashup - like the horn mount? Told you I was cheap - did I mention lazy? Well, someday, I'll figure out a horn mount for these when I put my table saw back together. DM Quote Link to comment Share on other sites More sharing options...
3dzapper Posted July 7, 2006 Share Posted July 7, 2006 Rick, Thank you very much for that extremely kind offer. Without seeming to be ungrateful and overly picky, is it a 2" throat horn? I feel bad to even question it, but I'm concerned that the BMS coax driver (2" throat) would suffer in a smaller throat and not give a true indication of the capabilities of the tractrix horn. I feel bad about having any reservations in light of such an offer. Talk about looking a gift horse in the mouth! I appologize for my lack of good manners (and bad spelling). Dana Dana, The original Edgar design calls for a 2" square throat which is how I built these. For the 1" throat K-55 I used a 1 3/4" step drill at the adapter end for the contour. Niel, I could not do it in cardboard so I started making one from plywood. It needs a bit more sanding on my little 1" bench belt sander. The belt broke and I have been meaning to get a new one but it keeps getting pushed back in my feeble mind. Now that you have reminded me, for which I am chagrinned ( I told you once I hadn't forgotten) I have written myself a note, will stop at HD in the AM on my way home from archery practice to get a belt, finish sanding, then put it in Monday's mail. Now that it is public, if I fail I hope to be severly chastized.[:$] Rick Quote Link to comment Share on other sites More sharing options...
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