The forum is contaminated by the same phenomenon that dirties the open Internet: personal disqualification as a substitute for argumentation.
Just now,
Questions For Interview With Bruno Putzeys & Lars Risbo About Purifi Audio - Page 9 - General Forum - Audiophile Style
There I mentioned the purchase and I could not resist at such a low price and try before that to buy the Jantzen.
630 Volt Polystyrene Audiophile Capacitors - on sale
I bought from: LOT 3 Condensateurs Styroflex - NEUFS 10nF - 600V - 0.010uF - 10000pF - 10% | eBay
After doing a search in the FTP where I keep the images since 1998, I found the package I received from France.
Questions For Interview With Bruno Putzeys & Lars Risbo About Purifi Audio - Page 9 - General Forum - Audiophile Style
I wrote some comments about polystyrene caps in a Spanish audio forum, closed some years ago.
There I mentioned the purchase and I could not resist at such a low price and try before that to buy the Jantzen.
630 Volt Polystyrene Audiophile Capacitors - on sale
I bought from: LOT 3 Condensateurs Styroflex - NEUFS 10nF - 600V - 0.010uF - 10000pF - 10% | eBay
After doing a search in the FTP where I keep the images since 1998, I found the package I received from France.
An externally hosted image should be here but it was not working when we last tested it.
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Funny thing, the power supply snubbers and the ferrite choke are pretty much different suppressors of the same real of imagined impingement:
1. both address super-sonic radiation which has been let loose in the system and cause distortion
and/or
2. both address super-sonic issues that most people (and most manufacturers) think are bogus or inaudible.
I'm pretty sure both snubbers and ferrite bead suppression "fix" problems that are bogus, trivial, or inaudible. But then I think factors like edge diffraction, point source, or phase are trivial or inaudible.
B.
Just for giggles, I read through much of the preceding thread.
Resurrection of this does seem to be somewhat futile - I assume you will take the advice on confirmation bias as read and ignored. Pity, as they are surely correct.
That said, that crossover looks simple and indeed cheap to the point of begging for a proper redesign.
Have you thought about turfing the "bling" in the trash can, and doing a proper XO design job on it?
Resurrection of this does seem to be somewhat futile - I assume you will take the advice on confirmation bias as read and ignored. Pity, as they are surely correct.
That said, that crossover looks simple and indeed cheap to the point of begging for a proper redesign.
Have you thought about turfing the "bling" in the trash can, and doing a proper XO design job on it?
It should be there now.
Zvu redesigned the filter to flatten the response on-axis. After thinking about it I decided to keep the current one since the spinorama at 30-40-50º is fantastic, so with two soft touches of equalization it is enough.
Original
Proposed by Zvu
Minimum Phase vs Linear Phase | Page 7 | Audio Science Review (ASR) Forum
Minimum Phase vs Linear Phase | Page 16 | Audio Science Review (ASR) Forum
In addition, its redesign also implies a second order with the woofer, so that the ferrite would surely affect the sound in another way, if so. I have more bass and better, drier, thanks to it.
In the end I am also supposed to change the cheap M.D.L. yellow cap by Jantzen Superior Z-cap. And then rebuild the filter by connecting everything point to point, changing the internal wiring (star quad, Canare 4S11) and new binding posts with low mass from ETI.
Step by step, so I check if the modifications improve the sound. The current sound is fantastic!
Original
Proposed by Zvu
Minimum Phase vs Linear Phase | Page 7 | Audio Science Review (ASR) Forum
Minimum Phase vs Linear Phase | Page 16 | Audio Science Review (ASR) Forum
In addition, its redesign also implies a second order with the woofer, so that the ferrite would surely affect the sound in another way, if so. I have more bass and better, drier, thanks to it.
In the end I am also supposed to change the cheap M.D.L. yellow cap by Jantzen Superior Z-cap. And then rebuild the filter by connecting everything point to point, changing the internal wiring (star quad, Canare 4S11) and new binding posts with low mass from ETI.
Step by step, so I check if the modifications improve the sound. The current sound is fantastic!
Attachments
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I thought I'd heard somewhere about the problems the class D amp people were having suppressing the RF. I looked around and found this which might be helpful.
https://hal.archives-ouvertes.fr/hal-01103584/document
https://hal.archives-ouvertes.fr/hal-01103584/document
Well, it's your pair of speakers. If you believe you hear an improvement, go ahead with it.
The other, more scientifically minded ones, including myself, surely will scratch or shake their heads on this expectation biased thang that won't become more reasonable by repeating it again and again and again - here and in another thread.
Best regards!
The other, more scientifically minded ones, including myself, surely will scratch or shake their heads on this expectation biased thang that won't become more reasonable by repeating it again and again and again - here and in another thread.
Best regards!
I commented to add the old image.
The improvement is so obvious that it cannot be denied even though it lacks or lacks a logical explanation at this time.
The modifications and subsequent tests have always been accompanied by the same person to try to make sure. ALWAYS first only a box to compare with the other. Except for the previous bypass with the NOS styroflex, the rest of the improvements - including the addition of mass and damping to the furniture - are undeniable for anyone.
Some seem that only they have advanced academic training and deny that others also have it
if they do not match, very unprofessional.
The improvement is so obvious that it cannot be denied even though it lacks or lacks a logical explanation at this time.
The modifications and subsequent tests have always been accompanied by the same person to try to make sure. ALWAYS first only a box to compare with the other. Except for the previous bypass with the NOS styroflex, the rest of the improvements - including the addition of mass and damping to the furniture - are undeniable for anyone.
Some seem that only they have advanced academic training and deny that others also have it
if they do not match, very unprofessional.
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If I did not notice the improvement in bass would try to implement the filter proposed by Zvu, maintaining the Mills MRA resistors and the bypass with Miflex KPCU-01 0.01uF 600Vdc. If I am so reluctant, it is because I like the bass very much. The problem has always been the treble, if the on-axis boxes are heard, but the coaxial ones almost always sound better off-axis.
About 3 cm I think.
BTW, they are not the first boxes I modify, mine or others. The first was about 26 years ago. Then with irritating fiberglass.
I have also checked the ferrite tweak with other loudspeakers, with first order filters too. Same impressions. Big 3-ways.
About 3 cm I think.
BTW, they are not the first boxes I modify, mine or others. The first was about 26 years ago. Then with irritating fiberglass.
I have also checked the ferrite tweak with other loudspeakers, with first order filters too. Same impressions. Big 3-ways.
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