henry218 Posted August 30, 2014 Share Posted August 30, 2014 This is my latest project using E JMLC Fibreglass horn from Poland. It is the most beautiful horn i have ever seen for a fibre glass, perhaps timber are more beautiful, but for modern looking horns, i think the work of Auto-tech Poland aspires truly high end. The horn is E-JMLC 600 with FaitalPro HF106 with their new Ketone diaphragm (its their answer to the more costly beryllium). The woofer is AE TD15M - 8ohm (actually this is more like 10ohm woofers) The Box is 140L in vented tuned to 40hz. I have gone all the way with the box, as this is as close as furniture grade kind of build i have ever done, with birch ply, Jarrah trims and Rock Maple sides for the front baffle. 4 Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 (edited) Now this may not be as excited as Paul Spencer's PSE , but after i set up the speaker and took some measurements (i have just finished 1, another one ready to be assembled), i know that this is going to be something special, i don't know how to say this for guys that never done measurements, but if your tweeter (mid-tweeter in this case) can make objects vibrating and excite the room with sweep tone, don't you think you will expect some dynamics goodness? So here are the E JMLC measurements, first is horizontal off axis from 0 15 30 and 45. Measurements conditions are : 1. Mic distance 1.2m 2. Axis is between Woofer flange and edge of the horn. 3. 1/48th smoothing 4. 4msec gating Edited August 30, 2014 by henry218 2 Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 E JMLC 600 vertical off axis I only did the negative (which means below the horn) as i think its more relevant considering the height of the horn is higher than most seats/lounge. Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 AE TD15m - 8 blended near field and far field. Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 Raw with no crossover for both TD15m and E JMLC HF106 Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 Now this is something that excites me... (please ignore the impedance wrinkles below 200hz, i only put temporary back panels and minimum stuffing, there are no box treatments yet) 2 Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 1 Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 4 Link to comment Share on other sites More sharing options...
zog Posted August 30, 2014 Share Posted August 30, 2014 Wow, very nice! Interested to hear your impressions of the HF106, I am using the HF144 which I like, which is a 1.4 inch CD with ketone polymer diaphragm as well, though it seems quite a rarely used device in DIY forum-land, Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 Wow, very nice! Interested to hear your impressions of the HF106, I am using the HF144 which I like, which is a 1.4 inch CD with ketone polymer diaphragm as well, though it seems quite a rarely used device in DIY forum-land, They have better HF than most CD i assumed. I can tell more after i build the other box and make the crossover for it. Im not that proud for having too many parts, as this will have 14 parts at least. Link to comment Share on other sites More sharing options...
Jehuty Posted August 30, 2014 Share Posted August 30, 2014 Very horny! What valve amp is it Henry? Are you using it yo drive the horn? Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 Very horny! What valve amp is it Henry? Are you using it yo drive the horn? Thats a chinese amp made by a friend of mine from HKG. They dont do bass very well but mid hi pretty good. Elson checked the design, its OPT is better than most and he measured it as well pretty stable to 40w, but gets more distortion after 10w. Link to comment Share on other sites More sharing options...
Newman Posted August 30, 2014 Share Posted August 30, 2014 ... if your tweeter (mid-tweeter in this case) can make objects vibrating and excite the room with sweep tone, don't you think you will expect some dynamics goodness? Lovely project there Henry, you can expect some high end results for sure. But re the quote, I say yes, but only if you fix every vibrating object! [emoji41] Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 Lovely project there Henry, you can expect some high end results for sure. But re the quote, I say yes, but only if you fix every vibrating object! [emoji41] Haha, unlikely, it vibrates my stairs railinga, not changing them soon! Link to comment Share on other sites More sharing options...
Newman Posted August 30, 2014 Share Posted August 30, 2014 Ugly truth, it will spoil the sound...[emoji53] Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 Ugly truth, it will spoil the sound...[emoji53] Its not a big concern, it just like some slap the railings rather than constant ringing 1 Link to comment Share on other sites More sharing options...
3G_ Posted August 30, 2014 Share Posted August 30, 2014 Exciting results and looks like a simple 2 way project. Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 Exciting results and looks like a simple 2 way project. There's nothing simple for the passive crossover! 1 Link to comment Share on other sites More sharing options...
Upfront Posted August 30, 2014 Share Posted August 30, 2014 What crossover slopes/frequencies are you thinking of using mate? Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 What crossover slopes/frequencies are you thinking of using mate? Its about 1.3khz, i have posted the summed response of my simulation, ill post the actual as soon as i build them Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 What crossover slopes/frequencies are you thinking of using mate? it looks like more of BW 3rd order acoustical @ 1.2khz for the woofer and BW 2nd order @ 1.55khz. the E JMLC itself can't go lower than 1.5khz, so in this case its pretty much as low as i can go. 1 Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 i have done more simulations, so as for now i have 4 revisions Link to comment Share on other sites More sharing options...
henry218 Posted August 30, 2014 Author Share Posted August 30, 2014 im leaning towards REV 4 Link to comment Share on other sites More sharing options...
henry218 Posted August 31, 2014 Author Share Posted August 31, 2014 well, after a sober and carefully zoomed in on SPL levels for all bandwidth, i found my initial crossover target response REV 5 Link to comment Share on other sites More sharing options...
henry218 Posted August 31, 2014 Author Share Posted August 31, 2014 (edited) Rev4 (Black) vs Rev5 (Red) Edited August 31, 2014 by henry218 Link to comment Share on other sites More sharing options...
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