If memory serves me, you felt in the end that you had burned up your brilliance control because your equalizer was boosting the signal by 10 or 12 db at a frequency that was traveling through the brilliance control. So that was in medical parlance iatrogenic. A problem you can easily get around by ceasing to cause it. anyway, I am sorry to learn of the demise of Plitron. They made good stuff. Sowter is also a very good company, and I am sure they can do a good job as well. To my knowledge they make only EI type transformers. Is that still correct? My other point was that you are taking a shot in the dark as to whether a single transformer with a 1 to 100 step up ratio can adequately drive the panel at frequencies as low as 100 Hz with vigor to satisfying levels. I wonder about this because Although I did not measure the frequencies involved, my memory tells me that when I tried to drive the panel full range with my 1 to 90 transformer the response was unsatisfying at frequencies that went well above 100 Hz, at least up to 200 or 300 Hz or so However, one could argue that because you are taking the onus of driving very low frequencies away from the ESL transformer, perhaps it will perform better at the higher frequencies (above 100Hz) that will be required. Anyway, you will find out if you do this experiment. I personally would not add a tweeter to Soundlab ESL or any othe high quality ESL, but that’s just me.
System that sounds so real it is easy to mistaken it is not live
My current stereo system consists of Oracle turntable with SME IV tonearm, Dynavector XV cartridge feeding Manley Steelhead and two Snappers monoblocks running 15" Tannoy Super Gold Monitors. Half of vinyl records are 45 RMP and were purchased new from Blue Note, AP, MoFI, IMPEX and some others. While some records play better than others none of them make my system sound as good as a live band I happened to see yesterday right on a street. The musicians played at the front of outdoor restaurant. There was a bass guitar, a drummer, a keyboard and a singer. The electric bass guitar was connected to some portable floor speaker and drums were not amplified. The sound of this live music, the sharpness and punch of it, the sound of real drums, the cymbals, the deepness, thunder-like sound of bass guitar coming from probably $500 dollars speaker was simply mind blowing. There is a lot of audiophile gear out there. Some sound better than others. Have you ever listened to a stereo system that produced a sound that would make you believe it was a real live music or live band performance at front of you?
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Dear @lewm : With all respect: I think that you posted this:
" This is perhaps not the place to discuss it, for fear of boring a few others...."
and seems now that you are just insisting with. You can follow doing but which is your target that could help us?
R. |
@lewm It was sort of iatrogenic. The processor was doing what it was programmed to do which was make the frequency response of the speaker flat. Because of that speaker's location there was a large dip in the high frequencies that the processor was correcting. I then poured the coal into that situation with very powerful amplifiers. New processors have programmable limits to keep such an event from happening. I corrected the problem by removing the window next to the speaker and replacing that brilliance control with a 500 watt resistor and a very large heat sink. Sowter does not make toroids. I used a 1:100 transformer successfully on the Acoustats using the same set up. It was one of their standard ESL transformers at the time. They may help design transformers to suit. I do not know yet. Using a super tweeter next to 8 foot ESLs is sonically risky. I would prefer a 6 foot ribbon out of a Magneplanar which would be less likely to call attention to itself as the radiation characteristics are the same. Above 12 kHz I think the tweeter will likely be less obvious. With the new processor I'll have four independent crossovers and I can experiment with less expensive equipment before I go to town. I can buy used Maneplanars, get new tweeters with their serial numbers then sell them. Perhaps I can get the local Magneplanar store to wrench a pair out of the company. I'll figure something out. What else is a retired guy going to do? |
Raul, You are right. I apologize to you and any others who were offended by my and Mijostyn's going off topic. It seemed to be permissible because no one else was trying to change the subject, back to the actual subject of the thread. But, dear sir, please also keep in mind that you do the same from time to time. Mijo, I will take our conversation private from here on out. |
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