JJkizak Posted April 9, 2007 Share Posted April 9, 2007 Rigma: Since that other thread got bumped do you still have the link to all your pictures? JJK Quote Link to comment Share on other sites More sharing options...
rigma Posted April 9, 2007 Share Posted April 9, 2007 Rigma: Since that other thread got bumped do you still have the link to all your pictures? JJK Here is the link with all the photos of the build of my Jubilee clones. www.jubilation.ws rigma Quote Link to comment Share on other sites More sharing options...
boom3 Posted April 9, 2007 Share Posted April 9, 2007 How much is MSRP for the Jubille KPT-535? Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted April 9, 2007 Share Posted April 9, 2007 Claude, Actually a 15" driver is 176.625 sq" and (2) 12" drivers is 226.08 sq" which is 28% more area, which is substantial.. rigma You are right it is more cone area. Does that include subtraction of the surround suspension (the non-radiating part) on both? I come up with 173 for the 12's vs. 143 for the 15" after subtracting 1.5" for the surround on both. The 12's are still 21% more radiating area and 2 motors, so it's in line with thoughts of improvement, except cost. Claude Quote Link to comment Share on other sites More sharing options...
meagain Posted April 9, 2007 Share Posted April 9, 2007 Well, what 'type' of networks are those? I see lots of parts. If one could translate that to Khorn networks either the stock types or aftermarket..... which would it be more akin to? Quote Link to comment Share on other sites More sharing options...
rigma Posted April 9, 2007 Share Posted April 9, 2007 meagain, they are Roy's design for the Jubilee, only with all air core inductors. rigma Quote Link to comment Share on other sites More sharing options...
Guest " " Posted April 9, 2007 Share Posted April 9, 2007 this one? Quote Link to comment Share on other sites More sharing options...
meagain Posted April 9, 2007 Share Posted April 9, 2007 OK - how about order type or slope type? Big or little slope? I'm trying to get a crude grasp. Quote Link to comment Share on other sites More sharing options...
Coytee Posted April 9, 2007 Share Posted April 9, 2007 How much is MSRP for the Jubille KPT-535? Check your PM's Quote Link to comment Share on other sites More sharing options...
DrWho Posted April 9, 2007 Share Posted April 9, 2007 they are Roy's design for the Jubilee, only with all air core inductors. It's my understanding that air cores have less DCR than the iron core types...is it possible that the extra 4ohms you're adding to the circuit is making up for less resistance in the inductors? And doesn't changing the value of the resistor slightly change the effective crossover point too? Quote Link to comment Share on other sites More sharing options...
rigma Posted April 9, 2007 Share Posted April 9, 2007 this one? Yes that is the one. rigma Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted April 9, 2007 Moderators Share Posted April 9, 2007 Dean: I've yet to figure it out. Perhaps it is a compliment as you're a respected member of the forum or perhaps some simply want to bust your a$$. I am happy for you & glad you are enjoying your investment. I'm going to venture to Hope this summer & see if Roy will give me an audition. I'll be packing ribs. no ribs required....just come on down and lunch will be on me..... have a blessed night, roy Roy, I sent you an email Quote Link to comment Share on other sites More sharing options...
DrWho Posted April 9, 2007 Share Posted April 9, 2007 regardless of what others think, i like the pursuit of good sound and really would like to know what you think about the jubs, good and bad......hey who knows, maybe we can make some mods to the system to make it better........i have gotten miketn's, coyotee-o's, ralph across the pond's, seti's, tonyr's, michael colters' and various others opinions on the jubs. like i have said on other thread, i am after performance issues. amplitude changes are like seasonings; add salt, pepper, what you like but the meal is in front you......what do you think... have a blessed night, roy delgado ............................................................. Hey Roy Something I believe might be of some help for anyone using an Active Crossover/EQ like the DX38 would be the ability to lower the High Frequencies a slight amount. Since variables like recordings, room, different type amplifiers(for instance I'm using a tube amplifier where as you have designed and listened with solid state) interaction with the K-69-A drivers impedance or even personal preferences can come into play. So what I've tried today was to take your basic paramaters programed into the DX38 for the K402/K-69-A and subtracted(ie: lowered) each one by (-1db) and saved that to One Program location on the DX38 and then again I saved to another Program with every thing lowered this time by (-2db). This gives me 3 options quickly to taylor the High Frequencies. It's early but so far in my situation the (-2db subtraction) seems to much and the (-1db subtraction) seems to be my preference. I want to add that at least to my ear if I vary the level by the DX38 between the two amplifiers for the LF and HF I'm using (once they have been gain matched) that just a (.5db change is noticable on vocals) and when the gain is perfectly matched it is at its optimum to my ears. So for the others using an active crossover I would make sure your different amps gain are matched as close as possible for the best sound. So do you believe this is a good way to very slightly taylor the sound of the HF Horn or would you go about it differently? mike tn[] Have you done any measurements to verify/quantify what your ears are telling you? With that fancy ETF and all I would be looking for resonances and stuff at the frequencies you're attenuating at. Or heck, maybe it's room related? I don't want to turn this into an amplifier debate, but I've read from numerous sources about how SET topologies tend to have a more difficult time with impedance swings. Namely rises in the frequency response and resonances at impedance peaks. I've been reading lately about crossover design techniques that will resonate opposite the driver to cancel out the effect. Another alternative is to simply use an amp with a higher damping factor (which will reduce, but not completely eliminate the problem). There's tradeoffs to every design so I hope I'm not busting any bubbles by proposing ideas that I'm not an expert on. I'm just proposing the argument in hopes of learning something. But seeing as you have a means to measure, I would be curious to see what they indicate (or if they don't indicate anything). Quote Link to comment Share on other sites More sharing options...
rigma Posted April 9, 2007 Share Posted April 9, 2007 they are Roy's design for the Jubilee, only with all air core inductors. It's my understanding that air cores have less DCR than the iron core types...is it possible that the extra 4ohms you're adding to the circuit is making up for less resistance in the inductors? And doesn't changing the value of the resistor slightly change the effective crossover point too? That is what I was wondering about the crossover point Mike, but all the inductors are in parallel in the HF section so I don't see less resistance to the 402.. Maybe Roy will chime and let us know. In my case the DCR is less but I had to go with real big air cores to make it that way. Based on cost iron or SLC have less DCR per dollar and size. rigma Quote Link to comment Share on other sites More sharing options...
rigma Posted April 9, 2007 Share Posted April 9, 2007 OK - how about order type or slope type? Big or little slope? I'm trying to get a crude grasp. I will have to let Roy or someone else answer that, I just don't know. rigma Quote Link to comment Share on other sites More sharing options...
DrWho Posted April 9, 2007 Share Posted April 9, 2007 With the actives I felt the bass was a little boomy, that is now gone with the passives. I don't know if this is due to the active or the fact that I was using a Crown SS on the LF and now I am using my 300B for the whole speaker. Do you have any acoustical treament in the room? Is the boominess perhaps room related and you're not noticing it as much with the 300B because it rolls off the low-end. I would be curious to read about your impressions after employing some acoustical treatment in the room. Or have you done that already and I just missed it? Quote Link to comment Share on other sites More sharing options...
DrWho Posted April 9, 2007 Share Posted April 9, 2007 OK - how about order type or slope type? Big or little slope? I'm trying to get a crude grasp. I will have to let Roy or someone else answer that, I just don't know. I would defer to Roy too, but it looks like 24dB/octave on both sides with 2 sets of EQ on the HF and 1 set of EQ on the LF. I just wanted to chime in and mention that 24dB/octave is considered steep in the pro audio world. It's certainly not a little slope [] Quote Link to comment Share on other sites More sharing options...
Guest " " Posted April 9, 2007 Share Posted April 9, 2007 "It's my understanding that air cores have less DCR than the iron core types.." It's typically associated with the gauge of the wire used in the inductor. Partsexpress has good charts for DCR and inductance based on wire size. Quote Link to comment Share on other sites More sharing options...
rigma Posted April 9, 2007 Share Posted April 9, 2007 With the actives I felt the bass was a little boomy, that is now gone with the passives. I don't know if this is due to the active or the fact that I was using a Crown SS on the LF and now I am using my 300B for the whole speaker. Do you have any acoustical treament in the room? Is the boominess perhaps room related and you're not noticing it as much with the 300B because it rolls off the low-end. I would be curious to read about your impressions after employing some acoustical treatment in the room. Or have you done that already and I just missed it? No acoutical treatment yet, that is my next project. I bought the EFT from http://www.etfacoustic.com/RPlusDSite/index.html but have not hooked it up yet. You could be right about the Crown vs. 300B but to me the SET sounds so much better. rigma Quote Link to comment Share on other sites More sharing options...
rigma Posted April 9, 2007 Share Posted April 9, 2007 Rigma--- Are you running the Angela "Model 91" amplifier? Is that the 300B you refer to? If so, I very much doubt the low end is rolled off. Mark, Yes, that is what I am using but with an added 10 mh choke and 100 mf cap in the power supply. I don't think roll off is an issue. The boomyness seemed to be(according to RTA) in the range of 80-140 hz, and it is gone with the passive and 300B. rigma Quote Link to comment Share on other sites More sharing options...
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