Hi Scott, I can confirm this. I spoke with Czar after his presentation AES San Francisco 2008: Tutorial T13
Meanwhile I don’t have any records
These are Chinese MF, right? Any thoughts about their own sonic contribution compared to the more boutique types?
That terminator will not work optimally Dan. Period.
You’ve twisted the resistor leads clockwise and in the Southern Hemisphere it needs to be anti-clockwise. Remember the Coriolis effect will spin electrons against the wire surface to a greater degree in the former case, raising the HF impedance. This will manifest itself as constricted mid range but at the top end you are likely to suffer from harsh treble. This is due to two reasons
1. The lack of damping (because the Zobel impedance has increased at HF) means the tweeter diaphragm is over excited so resonances that are normally not there when using a Zobel are now present
2. Magneto restriction of the tweeter coil/motor interface results in a distinct rise in 5th and 7th harmonics and as JC has pointed out numerous times, this is certainly problematic.
Again, always twist wires as follows:-
Clockwise in the northern hemisphere
Anti-clockwise in the Southern Hemisphere
Your system will sound better for it. Seriously.
You’ve twisted the resistor leads clockwise and in the Southern Hemisphere it needs to be anti-clockwise. Remember the Coriolis effect will spin electrons against the wire surface to a greater degree in the former case, raising the HF impedance. This will manifest itself as constricted mid range but at the top end you are likely to suffer from harsh treble. This is due to two reasons
1. The lack of damping (because the Zobel impedance has increased at HF) means the tweeter diaphragm is over excited so resonances that are normally not there when using a Zobel are now present
2. Magneto restriction of the tweeter coil/motor interface results in a distinct rise in 5th and 7th harmonics and as JC has pointed out numerous times, this is certainly problematic.
Again, always twist wires as follows:-
Clockwise in the northern hemisphere
Anti-clockwise in the Southern Hemisphere
Your system will sound better for it. Seriously.
Hi Zung.
These resistors are what's available from my local hobbyist component store so yes very likely that you are right, I would be very surprised if they were Roederstein or or the like.
Yes I have thought about cleaner/low tempco resistors from known sources......I got these because the store is 10mins return trip by E-Bike.
.I will take a close look at what's suitable and available at Farnell, RS etc.
Demian mentioned using 25W TO-220? type resistors, I intend to grab a few chemistries in suitable power ratings and take a listen.
In earlier experiment CF wired across loudspeaker terminals definitely sounded coloured......subjectively warm and fat/rolled out highs and lacking/losing fine detail which was ok for a day or so until I got bored with Muzak sound.
I haven't burned any 0.5W ones yet, 3W rating would be plenty of safety margin, do you have any ideas/recommendations on suitable resistors ?.
Wilson big bux loudspeakers have crossovers filled with capacitors. Now, that is a place where caps can do some real harm, because there will be significant voltage over them. Plus, the ratio between load and capacitor parasitics will be much worse than in a coupling situation.
No, you have it wrong, CW twist for L Ch and CCW twist for R ch.
I tried CCW for L Ch and then CW twist for L Ch, CW twist is definitely better and this also neatly avoids hemisphere issues.
.Try this for yourself, you will see/hear that I am right about this.
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But what does it mean?
Does it mean that you would really write down something for selling purposes even if you know it is wrong?
Does it mean that you would write some fiction for selling purposes and present it as fact?
Or does it mean, that you would try to carefully find out - including listening tests - what is going on and if some parts could lead to audible differences?
As stated before, our first attempt on blind listening tests were a comparison of film type capacitors (polypropylen vs. polyester) as coupling cap.
The polypropylen cap was audibly better.
I did a couple of years later a similar comparison with a line stage and again the capacitors made an audible difference.
As said numerous times before, obviously it is much more difficult to find out what exactly the reason is for such effects and one can never be sure that no other capacitor exist that might not have this impact.
The light blue color gives it away; I've got a bunch of them because they're cheaper than dirt, but I haven't done any listening yet...
I agree the CF types sound a bit dull, and these field battered old ears need a bit of a boost in the upper end.
Nah. I’m not insulting John. This must be the 50th time you’ve disparaged designers on this forum as being at the level you were 40 years ago. So, I am really only holding the mirror up to you here but it seems you don’t like it when it that happens.
As for the inductor claim, it only works if you lower the loop gain to the point where your amp will tolerate a capacitive load without breaking into oscillation. You only need 0.5 to 1 uH to ensure stability with any load - so it’s of the same order as a speaker cable. Taking the output inductor away is sub-optimal. Besides, you’ve never ever explained how it makes the amp sound better.
I tried CCW for L Ch and then CW twist for L Ch, CW twist is definitely better and this also neatly avoids hemisphere issues.
Try this for yourself, you will see/hear that I am right about this.
I don't think he's as suggestible as you.
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