I don't have any pain listening to high volume in my 4365..Originally Posted by bubbleboy76
That is a simple way to do it. But... I remember the severe UHF comb-filtering in the anechoic measurement of the 4365.
The stock 4365 was painful to the ears at high volume, in my setup.
I do not know if you remember my little conspiracy theory about the "detuned" 4365 filter?
If I do it, I will do it the way pos advices me to do it.
Newer. Not released yet.
I do not doubt that. I have seen very rolled-off UHF measurements on gearslutz-forum from your system, if I remember correctly.I don't have any pain listening to high volume in my 4365..
Maybe your room takes the edge off?
Aha...cool
What measurement are you refering to, 4365 or Cinema Screen Array?
Don't know. It was your thread on gearslutz.
What is the appropriate protection-cap value for the 045ti-1?
It is 4ohm, and crossover will be somewhere 8-15KHz.
I have 6.8uf and 0.68uf caps laying around, can they be used?
If it is like the 045Be it has its fs around 4.5kHz, so you need to aim for a corner frequency lower than that to avoid having that big impedance spike messing up the response. The other solution is to use an lpad to somewhat linearize the phase beforehand.
http://www.audioheritage.org/vbullet...l=1#post339108
(any pointer to the curves for the 045Ti ?)
Aiming for a 2kHz corner frequency looks to be a reasonable solution here, and that would translate into a 20uF cap.
Hallo!
All the measurements in Gearslutz is at the listening position, around 5meters and both speakers fireing. So, of course the HF is rolling off. To me, I can be wrong here, UHF is beyond 20000Hz.
We are not testing how the loudspeakers is performing, we trust fully in the JBL engineering department, but more how the room is performing.
Is this the new waveguides?
http://www.jbl.com/arena-series/
http://www.jbl.com/loudspeakers/CONT...=Black#start=1
http://www.jbl.com/loudspeakers/STUD...=Black#start=1
"If they sounded like this stock, JBL would sell miliions!"
Quote from my friend after hearing my system with this active setup for the first time.
He is an old JBL fan, and tricked me into being one, once upon a time.
You're killing me! Grrrrr.
Barry.
If we knew what the hell we were doing, we wouldn't call it research would we.
It's the extra bass that got him going, I think.
And you have subwoofer with yours, right?
I do run a pair of Array 1500's with them.
I just know what you can get with high quality DSP and getting some of the passive stuff out of the way. It's a fight to leave anything alone.
Barry.
If we knew what the hell we were doing, we wouldn't call it research would we.
My current 4365 active 2-way dsp settings with a 650Hz 48dB/oct Linkwitz-Riley acoustical crossover.
HF :
68uf Jantzen cross-cap
high-pass filter Butterworth 24dB/oct 810Hz
-4.3dB Q=5.0 520Hz
+2.3dB Q=4.0 740Hz
-12dB Q=1.0 1600Hz
-2dB Q=3.0 4200Hz
-1dB Q=2.5 6100Hz
+3dB Q=1.0 11kHz
-3.3dB Q=2.0 16000Hz
LF :
low-pass filter Butterworth 36dB/oct 600Hz
Delay 0.5ms (valid at 1m)
This is the settings I have gotten from POS, based on my measurements.
Then, I have added a shelf in the bass to my taste. Low-shelf starting at 135Hz, +8dB, 4.5dB/oct slope.
I also have low-shelf starting at 30Hz, 6dB/oct slope, down to -12dB, to not put unnecessary power below the port tuning.
Barry, try it you might like it...
But, you have to measure and set HF/LF relative gain levels, phase, and delay, correct according to your own system.
Attached are also POS "rephase" phase linearization files that can be used with MiniDSP OpenDRC. One correcting only the crossover, and one correcting crossover+bass reflex port.
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