kogeed Posted October 18, 2015 Share Posted October 18, 2015 Arash, you did not understand me. 402 not mine. I bought them for my friend here. He makes the photo on FB His name was Constantine. You need to negotiate with him. I can give you his direct mail. 1 Quote Link to comment Share on other sites More sharing options...
quadrokot Posted October 20, 2015 Share Posted October 20, 2015 402 production 4 Quote Link to comment Share on other sites More sharing options...
quadrokot Posted October 20, 2015 Share Posted October 20, 2015 more 3 Quote Link to comment Share on other sites More sharing options...
Gorm Posted October 20, 2015 Share Posted October 20, 2015 Quote Link to comment Share on other sites More sharing options...
The Dude Posted October 20, 2015 Share Posted October 20, 2015 I really like how you did the wood trim around the horn and incorporated it into the base/stand. 1 Quote Link to comment Share on other sites More sharing options...
quadrokot Posted October 20, 2015 Share Posted October 20, 2015 I used shellak to the inner surface of the horn 1 Quote Link to comment Share on other sites More sharing options...
quadrokot Posted October 20, 2015 Share Posted October 20, 2015 happened like this 3 Quote Link to comment Share on other sites More sharing options...
Arash Posted October 20, 2015 Share Posted October 20, 2015 (edited) Oh I'm dying here! I want to build K402 out of wood. please someone come up with a plan. I have a big vaccum press. it's pretty easy to form some layers of 1/8" plywood on a mold using vacuum press. Edited October 20, 2015 by Arash Quote Link to comment Share on other sites More sharing options...
quadrokot Posted October 20, 2015 Share Posted October 20, 2015 I have 402 of original. I made him a prototype. 2 Quote Link to comment Share on other sites More sharing options...
Arash Posted October 20, 2015 Share Posted October 20, 2015 I have 402 of original. I made him a prototype. quadrokot, your job is fantastic. pure art. could you provide us some details about K402 profile or the plan so we can try our skills? 2 Quote Link to comment Share on other sites More sharing options...
quadrokot Posted October 20, 2015 Share Posted October 20, 2015 not quite understand how to show drawings, if everything is done from the original horn. Sorry for my English. Quote Link to comment Share on other sites More sharing options...
spezjag Posted October 20, 2015 Share Posted October 20, 2015 not quite understand how to show drawings, if everything is done from the original horn. Sorry for my English. Were you able to take measurements and record your findings before you started construction? Those might be helpful to the people here who are interested in replicating what you have done (which, by the way, is fantastic!). Quote Link to comment Share on other sites More sharing options...
mikebse2a3 Posted October 20, 2015 Share Posted October 20, 2015 Wow.... very Impressive and beautiful..!!!! miketn Quote Link to comment Share on other sites More sharing options...
quadrokot Posted October 21, 2015 Share Posted October 21, 2015 it's not only the beauty, but the sound has changed. The attenuator crossover had to raise by 2 dB volume driver. I think this is due to the fact that the original horn resonated, these resonances and "cried" so that had to make mid quieter. The sound plywood horns was "calm", "fatter" s "tangibly". Speed is not lost, you can listen to everything from classical to rock. 3 Quote Link to comment Share on other sites More sharing options...
Arash Posted October 21, 2015 Share Posted October 21, 2015 does anyone know if it is possible to put K402 in a 3D scanner? Quote Link to comment Share on other sites More sharing options...
Arash Posted October 21, 2015 Share Posted October 21, 2015 it's not only the beauty, but the sound has changed. The attenuator crossover had to raise by 2 dB volume driver. I think this is due to the fact that the original horn resonated, these resonances and "cried" so that had to make mid quieter. The sound plywood horns was "calm", "fatter" s "tangibly". Speed is not lost, you can listen to everything from classical to rock. I would like to hear PSE-144 and K402 in a A/B test. I think PSE-144 will outperform K402. Quote Link to comment Share on other sites More sharing options...
djk Posted October 21, 2015 Share Posted October 21, 2015 (edited) "does anyone know if it is possible to put K402 in a 3D scanner?" Sure (but you will go broke). "I would like to hear PSE-144 and K402 in a A/B test. I think PSE-144 will outperform K402." Might. I intend to build a 27hz 100dB+ dual 12 PPSL crossed at 300hz to that style of mid-HF, it will be the same size as the LaScala. This is William Cowan's copy of a Danley product, I would use smaller drivers, perhaps 6-1/2's or even 5's (the Danley uses 8's and goes to 90hz). I can make the horn elliptical out of FG and resin. Edited October 21, 2015 by djk 1 Quote Link to comment Share on other sites More sharing options...
Chris A Posted October 21, 2015 Share Posted October 21, 2015 (edited) The attenuator crossover had to raise by 2 dB volume driver. I think this is due to the fact that the original horn resonated, these resonances and "cried" so that had to make mid quieter. The open and more compliant surface finish of wood attenuates, and the well-known effects of irregularities of the throat area will also attenuate, unfortunately. I'd like to see data in A-B fashion rather than opinions. About elliptical-mouth horns: http://www.diyaudio.com/forums/multi-way/256220-axis-null-horn-speakers.html There are no acoustic benefits that I see over rectangular mouth horns, in fact, there aren't any advantages that I see. As far as the PSE-144: I'd like to hear five drivers do better than one driver--over the same bandwidth. The crossovers must be really good, as well as the dimensional tolerances. Chris Edited October 21, 2015 by Chris A Quote Link to comment Share on other sites More sharing options...
Bjorn Posted October 21, 2015 Share Posted October 21, 2015 There is a possibility that the holes in the synergy horn will cause some audible diffraction and a poor impulse response. Geddes pointed this out in a discussion. Tom Danley said he was going to present better measurements with higher resolution. That was at least a year ago and he never showed anything. That might indicate something. Quote Link to comment Share on other sites More sharing options...
Chris A Posted October 21, 2015 Share Posted October 21, 2015 (edited) It's the extremely close midrange drivers next to the apex tweeter compression driver that I see are likely problem areas in practice to get right in the Unity or Synergy horn design--the sole difference between these two differently patented designs by two different companies apparently being in the method of choosing the frequency of crossovers and the passive crossover network time alignment of drivers in the crossover regions. The third tier of woofers in the typical Unity or Synergy horn is much more forgiving in terms of dimensional errors in the horn or driver locations, and crossover time alignment precision. Chris Edited October 21, 2015 by Chris A Quote Link to comment Share on other sites More sharing options...
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