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- #421
He is there. Go to follow on posts....thanks very much! However the link does not include the postal panther. I hope it doesn't indicate our leader is going postal!
He is there. Go to follow on posts....thanks very much! However the link does not include the postal panther. I hope it doesn't indicate our leader is going postal!
Found him. Now I can get some sleepHe is there. Go to follow on posts....
Very interestingly, I have a feeling that this is exactly what Amirm noticed on the Kef R3.
A perfect speaker for all parameters, but ...
https://www.diyaudio.com/forums/multi-way/352846-justice-kef-q100-2.html#post6165759
[ In my opinion, this speaker sounds better than the LS50. But...
As with the LS50 as well as the R300 also with this speaker, I have problems with two things. The first is the ferrofluid in the tweeter. The tweeter sound is great but it can be better. I have repeatedly found that removing ferrofluids from the tweeter has a very beneficial effect on sound, which is logical. But because of the bad crossover it was necessary to protect them somehow.
The other is a stupid thing is rubber ring they put in to control resonance membrane. I understand the engineering (since I am an aircraft engineer) approach to having a goal and now looking for a way to reach it, but you have to be aware that it is all a matter of compromise. Now, either they were aware that the sound would be compromised or they relied too heavily on measurements, and they didn't care much for the sound. Again on the other hand if they didn't do it I wouldn't be able to use the 6db / Oct switch with AL drivers.
I still enjoy these speakers, but I know it can do better, and that's what annoys me. The sound of the piano is slightly blurred because of the rubber that exists between the voice coil and the membrane. The voice coil and membrane must be firmly attached in order for even the smallest vibrations to be transferred to the diaphragm and converted into an acoustic signal.
I hope Dr. Jack Oclee-Brown is aware of this problem.
This phenomenon is also present in the R series of drivers, and is also present in bass drivers. It measures ok or doesn't sound good. Goes deep but sounds muffled. ]
Just because I reproduce his comments does not mean I share them in full. For example, he complains about how the piano sounds but in mine (modified) it sounds great.
The woofer breakdown problem can be solved with a slightly more complex filter.
What is a shame are the thin walls of MDF. Or material damping is addeed by us or we build new boxes. I opted for the former and the improvement was very substantial. Now they weigh more than the LS50. I said, the driver is very good, they saved the rest. Presumably the Q150 driver will be better, but they saved on the driver skeleton and in the inductor (woofer filter).
@amirm THANK YOU! Finally proper, real reviews. I just registered for the forum as I found the Holy Grail -- spinoramas
I am still new to digesting this info and would like to ask one clarification question. Assuming the Q300s are similar to the Q100, when you guys say that they perform better at 20 degrees - what does that mean? Does 20 degrees mean no toe in at all? Basically have the speaker pointing straight towards the back wall?
@maty thank you for these pic from the manual; I never read it. After years of playing around, I discovered for myself that the speakers are better integrated with subs when plugged. And now I see it is in the manual
But going back to my question, the manual suggests a toe in of ... 30 degrees?
You know, you can improve a lot the sound of the Q100 without to spend a lot of money. First with soft (Rephase), then inside (walls) and finally the crossover. Step by step.