rigma

K-31 woofers. rigma

I did RTA readings of my Jubilee Clone today and attached are the results. Roy, how does this compare with what I might expect to get with the real one under these conditions? Click on the attachment to open. rigma RTA.pdf

The pdf is much better. rigma

Here it is as a photo file. rigma

I did RTA readings of my Jubilee Clone today and attached are the results. Roy, how does this compare with what I might expect to get with the real one under these conditions? Click on the attachment to open. rigma RTA.pdf

Dean, I have an extra pair of Al's attenuator that I will try tonight. rigma

Tom, I sent you an email through this site with all my contact info. Let me know if you got it. rigma

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

Tom, if they are MQ I will take them for sure, even if the are something I may still want them but let me know the brand when you can. rigma

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

Tom, I am interested what trannys are the, Magnaquest? rigma

I will have to let Roy or someone else answer that, I just don't know. rigma

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

Yes that is the one. rigma

meagain, they are Roy's design for the Jubilee, only with all air core inductors. rigma

Here is the link with all the photos of the build of my Jubilee clones. www.jubilation.ws rigma

Mounted to the Jub bass bin. rigma

Here are the networks. I built a mirror image pair.

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

Dean, You beat me by a couple hours. I finished my passives about 4:00 pm today and just spent several hour listening. I just read your review and it mirrors what I found, I started with the 1 ohm resistor, then 2, then 3 and finally 4, all this before I read your review. I agree with every thing you said in your review, these things are awesome! 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. I will post more tomorrow, including pics of the passives, I am tired after about 8 hours of building and installing the passives. Question for Roy: Can we go to 5 ohms or maybe use an autoformer? I think the HF may need just a tad more attenuation. rigma

Dean, Interesting I was way off on that one it seems to be about the same as the Heritage line with passives. Rigma, What brand 300B amps and tubes are you running? The amps are Angela 91 the tubes are EH Gold. rigma

I will be running 300B's to power the Jubilee hopefully this weekend if I can get the passives done. That is what I used on my Khorns so it should be fine. rigma

OK you asked for it, so I will say everything bad I can think of about Roy! Uh I can't think of anything, I'll have to get back to you. rigma

Very nice work! rigma

Yea, I buy from them often, their service is great. I once bought a optical to coax converter from them that did not work. I called them and they told me throw it away and they sent me a new one. rigma