hi,
i don't like my name is in the title in this thread,
or where it is going, tedious, boring, OP opinions,
rgds, sreten.
i don't like my name is in the title in this thread,
or where it is going, tedious, boring, OP opinions,
rgds, sreten.
The only way to see if you prefer a 2nd order vs a 4th order design is to use a DSP based crossover
** I have never used a DSP. But I believe that this is a situation where the higher order filter is not an issue. We were discussing passive filter. You have not yet mentioned about distortion. To me this distortion is an "unknown" (may be not to you?) but I can only correlate what I hear to the distortion. I'm more than convinced that it does exist.
Well I have experienced it and the difference I heard was simply down to the different vertical off axis responses putting a little bit more energy into the presence band, other then that it sounded identical. Both the second and forth order also summed flat and were as close to identical as you're going to get on axis. This is a design with a wave-guide where the directivity of the wg is matched to the mid, the horizontal off axis was essentially the same for each filter - ie no holes off axis and CD after the wave-guide took over. The fact the two filters sounded different isn't a surprise because the C2C spacing is a somewhat high given the xover point, so that you're going to get comparatively larger differences in the lobing between the 2nd and 4th order. But in this case I wasn't technically hearing the difference between the 2nd and 4th order filters, I was hearing the difference in the polar plot.
Some would argue that what I was hearing was because of the filter and to a degree I agree. I preferred the 2nd order filter in that design precisely because of the way it affects the vertical off axis and therefore the 2nd order is better. This isn't quite the same thing as saying the 2nd order filter is better simply because it's a 2nd order filter though.
**To make it simpler, I wasn't arguing about the order of the slope, but the effect of the slope. I strongly believed that perceived sound is not affected only by those parameters you just mentioned/measured.
Either you have a design that phase tracks well or it doesn't. If you can't make it work with one type of filter then naturally you're forced to try something else.
**If what you mean with "type of filter" is the electrical slope/order, then with the same order we can achieve many possibilities with phase tracking.
I know how to read an audiogram. My wife is a nurse for a group of ear nose and throat doctors that employ several audiologists.
Audiologic Evaluations are done at 125, 250, 500, 1000, 2000, 4000 and 8000 hz. I have a slight dip of 10 db at 4000hz. 100% speech discrimination at 40db in right ear.
The hearing in my left ear is the same at every frequency.
Speech Reception Threshold 0db.
I have a copy of the evaluation.
I use hearing protection around loud noises.
The last time it was tested was five years ago.
Audiologic Evaluations are done at 125, 250, 500, 1000, 2000, 4000 and 8000 hz. I have a slight dip of 10 db at 4000hz. 100% speech discrimination at 40db in right ear.
The hearing in my left ear is the same at every frequency.
Speech Reception Threshold 0db.
I have a copy of the evaluation.
I use hearing protection around loud noises.
The last time it was tested was five years ago.
Phil Bamberg states some pretty useful ""rules"":
Thanks. I will check those numbers in real life examples, later.
That's not because of the electrical aspect, though. Acoustically they won't measure the same.
Yes, agree. But sometimes I got confuse when people mentioned something such as "acoustically" will measure the same or different, without mentioning what acoustical parameters actually being measured/referenced.
System7 needs to visit New Orleans to see live voodoo.
If Streten does not like this thread why does he keep posting?
In between posts I am on constant surveillance for deer engaged in crop damage on my farm ha ha
If Streten does not like this thread why does he keep posting?
In between posts I am on constant surveillance for deer engaged in crop damage on my farm ha ha
I have been laughing myself silly. It took a farmer to explain it. Most people still can't understand it. Read books first and foremost.
But I always excelled in math My father taught Physics, Calculus and Trigonometry and got sick of it and went back to tree farming.
I can't wait to read the next post. Every time I try and explain something it becomes a thesis.
But I always excelled in math My father taught Physics, Calculus and Trigonometry and got sick of it and went back to tree farming.
I can't wait to read the next post. Every time I try and explain something it becomes a thesis.
To make it simpler, I wasn't arguing about the order of the slope, but the effect of the slope. I strongly believed that perceived sound is not affected only by those parameters you just mentioned/measured.
As far as I'm concerned there isn't much more to it then properly integrated drivers with respect to SPL and phase. Taking into consideration the drivers useful bandwidths with regards to distortion and giving a desired set of off axis curves. This to me means no off axis holes laterally and a main vertical lobe on the listening axis that is wide to allow for a variation in listening height.
If what you mean with "type of filter" is the electrical slope/order, then with the same order we can achieve many possibilities with phase tracking.
No I meant acoustic target. The electrical transfer function of any loudspeakers crossover is basically meaningless, the only thing of any real interest is what the driver does after you've applied the filter.
😴That's where this thread has taken me.......
I quite agree, apart from the off topic stuff, this thread really has nothing going on.
As far as I'm concerned there isn't much more to it then properly integrated drivers with respect to SPL and phase.
I'm a proponent of more aggressive slopes, but there is more to it.
The reality is, the majority of drivers people choose to use, lack resolution (however you want to measure it). This is especially true of typically inadequately treated paper cones played right into/through their breakups, mated to very resolving drivers (like planars and ribbons)
The shallower slope does mesh the drivers together better, because the transition isn't as abrupt.
But that's not as true when you get to truly/equally resolving drivers. It's only true with drivers that, in their intended passband, have notable sonic signature.
RockLeeEV that is why I stated driver choice is critical. You can't compare a Scan Speak split cone woofer to a Dayton.
RockLeeEV that is why I stated driver choice is critical. You can't compare a Scan Speak split cone woofer to a Dayton.
The scanspeak split cone isn't magic, though.
Wasting time on drivers made to play wide bandwidths, just so you can get away with an electrical circuit that makes you feel good, is a waste of time.
The best drivers IE Seas W18, don't actually play all the wide a bandwidth, but sound good in the bandwidth the play in.
Why would you pidgeonhole yourself to losing resolution, just to keep the electrical crossover less complex?
Why would you choose a driver that can play with a series crossover, 1st/2nd order slopes, as your criteria?
Sure there's some drivers where such crossovers work, but you're then restricted to them.
I want the speaker that sounds the best, so i'm going to use my choice of drivers as a starting assumption. Not "good drivers that work within my self-imposed handicap because I think it's probably better based on..um...yeah"
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this thread really has nothing going on.
It much depends on whether we look at ourselves as an empty glass or a full one.
Jay if the thread has nothing going on why do you keep posting ? I was using the driver price as examples RockLeeEV .
RockLeeEV I am not using self imposed drivers. I am using some the best oem drivers for my own use..
I have designed many systems for private use that achieve the goals using off the shelf drivers..
No forum user has yet answered the question for the I don't know how many times I have asked.
What COMMERCIAL louspeakers with seires crossovers that accomplish second order rolloffs after the 2nd octave has anyone heard?
I think the main goal for most forum users is to argue with each other. That is sad.
Maybe between posts they should do their ab work ha.
I have designed many systems for private use that achieve the goals using off the shelf drivers..
No forum user has yet answered the question for the I don't know how many times I have asked.
What COMMERCIAL louspeakers with seires crossovers that accomplish second order rolloffs after the 2nd octave has anyone heard?
I think the main goal for most forum users is to argue with each other. That is sad.
Maybe between posts they should do their ab work ha.
And you can think what you want- you are welcome to do so.
I don't have a beef with you, and you started with the personally demeaning comments. I just mentioned it was the same old thing as usual.
I would like it if you would cease,
Wolf
Wolf-teeth you and many othe people on that forum had a beef with me. First of all nobody really knows who is who on these forums.
Many forum users who use to post on Parts EXpress and this forum are sick of being put down. If a persons car breaks down and the mechanic makes fun of the customer for not understanding the reason why their car broke down there will be very few repeat customers.
People in the industry take offense when an ouside source discover trade secrets. I deduced Fried designs about 20 years ago it's a hobby.
One former owner and I discussed the simplicity of these designs. he now races cars on television broadcasts he is also a nuclear engineer. He also owned several prominent audio companies One sold Muse amps. He left Mi he was sick of the nonsense in the industry and is in upstate NY
Many forum users behave like children They throw the first punch and get hurt and cry foul. If other forum users want to trade insults and can't take it get a more challenging hobby. Instead of being nice I might as well turn to the darkside. People want to call me boring , imply that I am stupid I wiil return the favour.
It would seem mentioning anything about Fried speaker designs or another way to design t-lines without a computer program is forbidden. It all comes down to formulas.
If a person really understands theory it only takes the math.
Read Sytem7's quotes how every law of physics requires a formula. not an exact quote but you should understand the meaning.
.
Allen B was nice enough to do a simulation. I asked him because I saw what kind of a person he is helping novices with questions.
He is a very good role model.
If other forum users want to play this game I am up for the challenge.
If a person really understands theory it only takes the math.
Read Sytem7's quotes how every law of physics requires a formula. not an exact quote but you should understand the meaning.
.
Allen B was nice enough to do a simulation. I asked him because I saw what kind of a person he is helping novices with questions.
He is a very good role model.
If other forum users want to play this game I am up for the challenge.
Jay if the thread has nothing going on why do you keep posting ? I was using the driver price as examples RockLeeEV .
I don't know who was asking this. But I'm not the one who said that the thread has nothing going on. I've learned a few things from this thread.
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