Dunlavy vs Coincident

Coincident has come out with a new series of speakers UHS ( ultra high sensitivity series loudspeakers) "specifically designed to take advantage of the inherent sonic benefits of single ended triode tube amplifiers". The top of the line is called the 'Victory' 97 db 14-ohm response down to 36 Hz. I'm going to here it as soon as Chicago dealer has it in.

Sean, how did you make out with the Seas drivers you got from the Coincidents? Did you graft them into a new project? I have been meaning to ask you, but this thread put it back in my memory. Were you able to contact Israel in regards to the differences from an off the shelf Seas driver(if any), and crossover design? Is he running these mids flat out, or with crossover components? His newer designs feature high impedence(10 - 14 ohms), and I was wondering if he was running the drivers in series, in order to double it(from 6 - 8 ohms). Any information you are kind enough to pass on would be appreciated. Thank you.

I tried emailing Israel a couple of times with no response. Even though i did my best to reassure him that i was NOT a competitor or manufacturer of any type, he probably thought that giving such information as to specific make and model of the drivers he uses is "proprietary information". As such, the drivers are still sitting in the boxes. One of these days, i'll throw them on my puter with the driver testing equipment and come up with the T / S parameters. Once i've got that and a frequency response chart, then i can do something with them.

As such, the only thing that i can tell you about them now is that they were the mids in a set of Eclipse's. From what i can remember the original owner telling me, they only had one crossover component hooked up to them and they were not running in a band-pass configuration. Israel is obviously a believer in the "simple crossover" school of thought. While this can be done with great results, you obviously have to select your drivers and driver placement VERY carefully. While i doubt that the new models use the same drivers due to differences in sensitivity, i can measure the DCR of these and get back to you. Sean
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Thanks for the update Sean! I am regret that Israel did not respond back. As I said, I do feel the drivers are probably wired in series(via their advertised impedence). After you perform your measurements, for fun you might want to try wiring them in series, and running them flat out(no crossover components in the circuits). Do some analysis of this configuration, and proceed from there. I have also migrated to the simpler is better philosophy in terms of crossover design. I feel it lets more of the soul of the music through, in addition to being the most benign load a dynamic driver can present to an amplifier. The success and great sound of Coincident is living proof to me that others also agree. I do feel that a capacitor on the tweeter leg is necessary. Especially, if the speaker will ever see a good deal of power, which we cannot ever discount during the design phase. As you have four drivers, do you feel more inclined to use a D'Appolito configuration, or go with both midranges below the tweeter? From my experience, Seas drivers offer a very fast sound. Perhaps their strongest of attributes? It makes sense to design a lively speaker around them, to show them in their best light. As they say, the midrange is 85% of the speaker. Woofers lagging behind would not integrate well into a holistic loudspeaker, in my opinion. Just one man's opinion. However you proceed, and whatever you do, GOOD LUCK! Again, thanks so much.