Back emf is what controls (stops) speaker movement right?
So when I put the zobel/Boucherot in front of (before) the the xo I noticed a rather annoying ringing on some frequencies, was that a result of blocking emf?
Because if it was, I’d say back emf is a good thing.
If i’m better off sticking to things that doesn’t involve electrocution just say so.......i’m Ok with that😀
So when I put the zobel/Boucherot in front of (before) the the xo I noticed a rather annoying ringing on some frequencies, was that a result of blocking emf?
Because if it was, I’d say back emf is a good thing.
If i’m better off sticking to things that doesn’t involve electrocution just say so.......i’m Ok with that😀
Yes I did Joe.
However, that was specifically addressing the situation of people here trying to discredit and smear your name WRT stealing ideas from Allen. I knew your relationship with Allen and felt this forum behavior crossed a line of being unacceptable. So I spoke up and corrected the situation.
When it comes to this whole speaker debate I have purposely stayed out of the discussion. I have my own ideas of why such directly driven, parallel networks are possibly audible but they will stay my own ideas. I certainly understand the physics being discussed. My time and energy are much better directed to areas more fruitful.
Mate, I honestly don't really understand your motivation to keep going when it's clear that it's an endless debate that will never be resolved. Time is precious Joe, I learned that lesson 5 years ago.
And that's all I have to say about that, or should It be 'thayet' ! 🙂
T
The measurement shown a couple of hours ago was measured at speaker terminals. At acoustical side, it makes no difference and distortion remains the same.
I hope you are joking, because parallel R (RC) used with a "normal" solid state amplifier has no effect on acoustical distortion. Only if you speak about a tube SE amplifier with distortion higher than the speaker has there may be some effect, or if the solid state amplifier is ill-conceived.
Maybe he can be reprogrammed, I stand by my opinion that there is more here than it seems. Joe is smart enough to ignore jn's inputs completely.
Extra loading on a HPF (tweeter) will cause raising of -3dB point so I'm curious about the spike.?
Compressed audio like MP3 will have a 15/16 k cutoff ?.
My experiments with RC/Zobel network mounted/soldered directly across the bass driver terminals yielded much clearer tighter differentiated and tuneful bass mids and highs....everything.
I used a sig gen sensing resistor and AC voltmeter to fine tune the values to give loudspeaker input terminal rising impedance nulling ie flat impedance to past 40kHz, this measurement can be done with soundcard nowadays.
I ran a very good stereo 150W/ch rack mount studio amp feeding the speakers via Canare star quad low inductance cable and the result was much better than the original with way better depth imaging and subjectively clearer and better power handling and 'presence'.
One key is to solder the RC network components directly to the driver terminals, anywhere else don't work the same.
This driver side RC network is not the same as what Joe is proposing which is the RC network across the loudspeaker input terminals to achieve same flat resistive HF load characteristic
I did not try Joe's method at the time but I did think about it and still agree that it is worth trying and is not great cost for the RC networks only.
I still say try 100R 1W at each end of the cable and then maybe fit suitable RC Zobel to set flat impedance, IME the resistors are a good start.
Ok thanks, IME I found fine tuned RC across direct connected 8" woofer did a whole bunch of good stuff.
What was the amp ?.
There are plenty of 'ill conceived' AVR's and amps out there and I find they can be quite sensitive to load reactance, the graph you gave shows significantly changing distortion wrt to frequency for the normal load, and although the EQ'd load causes higher distortion at the speaker terminals it is constant wrt frequency......perhaps this is a key ?.
You are measuring change in distortion of the voltage signal at the speaker terminals would that not by definition be audible ?.....or are you saying that the magnitude of the change is not sufficient to be audible ?.
I would say spot welding would not introduce any new metallics. No solder is used inside any 8-legs.
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Should I use Argon shielding gas to be sure?
It's why they sound so good.
Looks good in a magazine review as a benign load. Many speakers have impedance compensation after the crossover. Networks became easier with programs like LEAP and its ability to import measurements to its simulator.
Yes it's fine, but I disagree with how you came to this conclusion.
Your primary indicator should be the speaker response. Whether you achieve this with or without the RC (many ways to skin a cat), it isn't about Zobel, per se.
What do you disagree with my subjective path, process of elimination or ?
Would ringing cause a spike in fr? That might explain the spike I had at 1800hz
If that’s the case i’ve never encountered tweeter ‘ring’ before......it’s cringeworthy for sure.
Would ringing cause a spike in fr? That might explain the spike I had at 1800hz
If that’s the case i’ve never encountered tweeter ‘ring’ before......it’s cringeworthy for sure.
Back emf is simply the voltage generated by the voice coil velocity through the gap field. If it matches what the amplifier is trying to do, no current is drawn from the amp. It it does not match, the difference in voltage will cause a current proportional to the difference divided by the loop resistance.
It is easy to model, and quite a few here are actually experts in that domain. I post here (and only here) because so many here are very very good at this.
Jn
so, you said it anyway. Trust me, it is not cute.I could be cute and say something along 'maybe they are not the experts they think they are.'
so, my dad did it, so that means I am an expert..
I have real world experience in sitting on the bowl. I guess that makes me an expert???
except of course, electrical engineering, mechanical engineering, acoustic theory, energy conversion, or even people skills.
Sadly, the discussion requires you actually be familiar with what was taught in those textbooks.
I am on a first name basis with every janitor and waitress I deal with. That does not mean anything other than I know their first name..
Perhaps they simply yes you to death to get you to go away?
No. An expert is someone who is world renowned at what they do. One who does not have to denigrate others on a forum in a feeble attempt to pretend they are smarter or better.
So claiming that any response contrary to the drivel you post is now caused by "ego"?
I got where I am by learning the technology, hard work, questioning. As have many here. You are hanging your expertise on flinging stuff on the wall and hoping something sticks??? Your attempts at lowering others to raise yourself does not sit well with me (obviously). I am always available for dialogue, questions, discussion, whatever you or anybody wants. But your passive aggressive schtick is unacceptable. If you wish new orifices, I will be happy to oblige.
I do however, prefer spirited and nice dialogue. I hope you will eventually do so.
Jn
Ps. Using this IPad is horrible. Takes forever to post..
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