How to clean the DC at mains. And ripple too.

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maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #80 on: 17 Mar 2018, 10:15 am »
Bruno Petzeys wrote too:

Quote
Large “audiophile” axial capacitors: Some of these are sold as “low inductance” or even “non - inductive”, but be not fooled. Apart from ye ole polystyrene caps, all film caps have schoopered (metal - sprayed) end contacts, shorting out all windings. Thei r inductance is dictated only by size. Some figures: a standard 0.2” pitch MKT: 5nH. A 1.5”x0.6” round axial cap: 20nH. Just putting one of these in an output filter increases conducted emissions by a minimum of 12dB compared to a humble MKT. If you see a large axially mounted cap in the output filter: groan in despair.

We can see a polystyrene cap:

nord NC500 buffer board

[IMG] https://static.wixstatic.com/media/bee373_e679de6402d24c97be5bf61f548adfff.jpg/v1/fill/w_992,h_614,al_c,q_90,usm_0.66_1.00_0.01/bee373_e679de6402d24c97be5bf61f548adfff.jpg

And in my cheap tweaked KEF Q100 crossover too:

[IMG] http://maty.galeon.com/WP-imagenes/kef-q100/KEF-Q100-crossover-styroflex-bypass.jpg

[IMG] http://www.diyaudio.com/forums/multi-way/218281-kef-ls50-post5363031.html

I still can not find the explanation of why bypassing the tweeter capacitor I experienced the improvement. The same with the Würth 150 kHz ferrite with the woofer cables (I have an hypothesis). But I can not deny the great improvement.

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #81 on: 17 Mar 2018, 10:33 am »
By the way, KEF, like other companies, spend very little on speaker filters. Why they use a 10 uF bipolar capacitor? I am sure Danny Richie could easily improve the crossover and sell it. Or like my cheap tweaks.

[IMG] http://maty.galeon.com/WP-imagenes/hard/KEF-Q750-crossover.jpg

Borrowed picture of:

[Polish review] http://www.avtest.pl/zestawy-glosnikowe/item/767-kef-q750

[IMG] http://www.avtest.pl/images/testy/kolumny/kef-q750/KEF-Q750-8-impedancja.jpg

[IMG] http://www.avtest.pl/images/testy/kolumny/kef-q750/KEF-Q750-9-zzz.jpg

http://www.soundstagehifi.com/index.php/reference-components/1146-recommended-reference-component-kef-q750-loudspeakers

Quote
Until now, the lowest-priced floorstanding speaker in our list of Recommended Reference Components was the KEF R500 ($2599.98 USD/pair), reviewed in August 2012, and added to the list the following month.

Hans Wetzel’s review of the KEF Q750 loudspeaker ($1499.98/pair), published in February 2018 on SoundStage! Access, changes that. In his review, Hans wrote of the Q750: “It’s one of the most neutral transducers I’ve ever heard, and for the money offers staggeringly transparent sound”...

-> https://www.soundstageaccess.com/index.php/equipment-reviews/856-kef-q750-loudspeakers
« Last Edit: 17 Mar 2018, 04:42 pm by maty »

Danny Richie

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Re: How to clean the DC at mains. And ripple too.
« Reply #82 on: 17 Mar 2018, 04:24 pm »
Quote
I still can not find the explanation of why bypassing the tweeter capacitor I experienced the improvement. The same with the Würth 150 kHz ferrite with the woofer cables (I have an hypothesis). But I can not deny the great improvement.

There is a well known reason for this. We use by-pass caps in several applications for the same reason. And yes the improvement can be fairly significant if done right.

Quote
I'm sure Danny Richie could easily improve the crossover and sell it. Or like my cheap tweaks.

There is still a lot of up-side potential for sure. If you want to take them up another level or two then I'll be glad to help you with it.

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #83 on: 17 Mar 2018, 05:13 pm »
There is a well known reason for this. We use by-pass caps in several applications for the same reason. And yes the improvement can be fairly significant if done right.

Reason? Maybe it has something to do with the harmonics, I speculate. xrk971 detected and measured what happened with a resistance from the new DIY class A ALPHA. He put a thin metal resistor and the harmonic profile changed to H3 predominant. It changed to a carbon and was H2 predominant again. Then changed to a thick metal and kept H2 predominant. Same values off course. But without measures it is only an speculation that I do not believe it much. It goes against everything I know. I have a better idea: maybe the HF distorsion. Well, I have no idea.

http://www.diyaudio.com/forums/solid-state/318102-aksa-lender-mos-hybrid-aleph-alpha-amplifier.html

I had planned to spend much more money in the capacitors -without bypass- with the Jantzen Superior Z-Cap but I liked the improvement so much that I decided that is how it stayed. And very cheap!

I am in love with my cheap tweaked KEF Q100 coaxial speakers. I suspect that the real sensitivity is closer to 84 dB than the 86 dB advertised.

I would like to change my big boxes with the KEF Q750. The sound coherence and uniformity sound level that creates a good coaxial speaker is a wonder, magic. Let is see if there are more measurements available soon, such as frequency response and, above all, dispersion.

Danny Richie

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Re: How to clean the DC at mains. And ripple too.
« Reply #84 on: 18 Mar 2018, 12:17 am »
maty,

Think of it like this. Capacitors charge and discharge energy. In between that time they actually store it. Larger caps have slower discharge rates because of their size. The signal is sent, they hold it for a moment, then discharge it. Huge caps are used in power supplies just for that ability. In a crossover this effect causes a slight smearing that reduces the space between notes and eats up detail levels.

Smaller caps however charge and discharge pretty quickly because of their size. Curtain types of caps can be faster as well. So when you by-pass the larger cap with a smaller one then the smaller one tends to discharge the larger one so that there is less stored energy. The result is a cleaner sound, more space between notes, and better detail levels.

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #85 on: 18 Mar 2018, 08:38 am »
The yellow capacitor of tweeter: 3.9uF 100V.

Polystyrene: 10nF 600V = 0.01uF 600V

Both have very small capacitance.

The ATL Hi-Fi DC blocker have a small 0.47uF Vishay to by-pass the very big electrolytics EPCOS/Mundorf too. And a resistor too.


Quote
Schematic is similar to this one used in well known Vladimir Shushurin’s Lamm-1 amplifier.

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #86 on: 18 Mar 2018, 08:52 am »
The components that I almost bought for the KEF Q100:


The Neotech SOCT-16 hookup wire does not appear because I was unable to dismantle the speaker for fear of damaging the crown, that must be very well stuck in my boxes.
« Last Edit: 18 Mar 2018, 10:31 am by maty »

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #87 on: 18 Mar 2018, 12:23 pm »
Searching images about the PSU of Lamm-1 amplifier, the expensive Lamm Industries ML2.2 single-ended-triode amplifier (*):

-> https://audiofederation.com/hifiing/2005/HE2005NYC/day1/track5/index.htm

[IMG] https://audiofederation.com/hifiing/2005/HE2005NYC/day1/track5/IMG_5139.jpg

We can see a RF/EMI filter (little steel box). And a star connection over the big caps. And... the power section is very worked.

Lamm ML2.2 monoblock power amplifier Measurements

https://www.stereophile.com/content/lamm-ml22-monoblock-power-amplifier-measurements

H2 very predominant harmonic profile. Like DIY SS class A MoFo!

[IMG] https://www.stereophile.com/images/413Lammfig12.jpg

(*) single-ended-triode -> H2 predominant.


maty

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Ferrites to attack!
« Reply #88 on: 19 Mar 2018, 04:28 pm »
I have just read it here: http://www.diyaudio.com/forums/multi-way/320206-jbl-lsr305-tweaking-post5377059.html

He also used ferrites to improve a speaker, in this case the cheap active monitor JBL LSR305.

https://www.gearslutz.com/board/showpost.php?p=11396795&postcount=4&

Quote
Here's the full text from the above amazon review (now deleted)

Quote
By NotaSecondTime.

...I'm an engineer who has been experimenting in high-end audio/video since the dawn of home theater. This speaker is one significant breakthrough I've been waiting for, but IM discriminating HO, only sounds really good with the following $8 modification.

After a week of break-in, i made an inexpensive but audibly significant internal upgrade to the JBL LSR305 monitors.

For those who are electronically inclined, the mod replaces the two amplifier output ferrite o-rings with four of [Gino 10 Pcs Movable 7mm Inner Diameter Black Ferrite Core Ring Cable Clip UF70B] available from Amazon. So for two speakers a total of 8 new ferrite clamps is required. Cost $8 and will void your $119 investment (actually its uneconomical to send back the entire speaker for warranty service, I'd isolate & send just the amplifier module or the speaker driver)...

The modded speaker sounds considerably more refined & coherent as if cut from the same cloth. Also less distortion. Imagine seven channels for $960, or eleven bi-amped speakers for $1320. Add a powerful subwoofer and you're good-to-go...
« Last Edit: 20 Mar 2018, 10:16 am by maty »

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #89 on: 19 Mar 2018, 09:11 pm »
Re: Review and Measurements of SMSL M8 DAC

https://audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-smsl-m8-dac.2457/#post-70554

Quote
I too have this DAC and have been very pleased with its performance. But at the same time, also has been susceptible to noise/hiss, which was remedied with ferrite cores on the cables.


Old pictures:

[IMG] http://maty.galeon.com/WP-imagenes/hard/ODAC-with_rear_RCA_outputs-Wurth-ferrite-150Khz.jpg

[IMG] http://maty.galeon.com/WP-imagenes/hard/RCA-cables-Wurth-150-khz-ferrites.jpg

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #90 on: 19 Mar 2018, 10:51 pm »
By the way, I think that my DC Blocker prototype with Mundorf 47,000uF 125ºC is already stabilized. During these weeks I have noticed that the sound has been fluctuating, improving and getting worse. Now it takes several days sounding great with TV and the movies with my old Western HDTV.

When it sounded bad, my second system (Marantz) sounded good so by elimination it should be the burning of those fat capacitors.

In the next few days I will make the change and check if it sounds better than the more cheap EPCOS 18,000uF 105ºC (out of stock for now; Factory Lead Time: 32 weeks in Mouser).

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #91 on: 20 Mar 2018, 09:13 pm »
I just optimized the windows a bit more and I got a clearer sound. I hope it is not fatiguing, it is in the limit. I have lowered the LPF to 19,550 19,350 19,150 Hz to alleviate it. More clear -> less emotion?

I will need a few days to get used to the new sound. After which I will do the test with the DCB with Mundorf.

Better sound? without spending a penny.

[Update]

Now it is OK. More clear sound but less than before and EMOTION, with more bass too! LPF at 19,850 20,050 Hz. One process now always works in Real Time.

Very good sound without emotion is less, much less, addictive.

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #92 on: 21 Mar 2018, 05:54 pm »
Love ‎– Forever Changes (1967)  2016 MFSL 45 rpm, 24/192 vinyl rip

https://www.discogs.com/es/Love-Forever-Changes/release/9015970


Amazing clarity. From 1967 year! Very great sound/music/album.


CD edition and vinyl, no MFSL

[Customer Review] https://www.amazon.com/Forever-Changes-LOVE/product-reviews/B000058983/ref=cm_cr_arp_d_viewopt_srt?ie=UTF8&reviewerType=all_reviews&sortBy=recent&pageNumber=1


https://en.wikipedia.org/wiki/Forever_Changes

Quote
Forever Changes failed to achieve commercial success when it was first released in 1967, but it has since become recognized as one of the finest albums to come out of the Summer of Love era, ranking 40th on Rolling Stone magazine's 2003 list of The 500 Greatest Albums of All Time,[2] being inducted into the Grammy Hall of Fame in 2008 as well as being added to the National Recording Registry in 2012...

The next post will be about the DC Blocker with Mundorf, I promise.


But before...

Marvin Gaye ‎– What's Going On (1971) 1986 EU, 24/96 vinyl rip

https://www.discogs.com/es/Marvin-Gaye-Whats-Going-On/release/1559040

Amazing improvement. I have heard LOVE for the first time but W'GO have been a few weeks. Incredible improvement, incredible. If you tell me, I do not believe it!

What is the point of taking the risk of buying a new amplifier? And of a new DAC even if it is the new RME ADI-2 DAC:icon_lol:  :scratch:

If I quantify the improvement, it is 50%

Virgencita virgencita, que me quede como estoy / Virgin little virgin, let me stay as I am

Proceed to make a copy of the windows partition!


Olivia Newton-John - If You Love Me, Let Me Know (1974) (Japan for USA 1987) {SSRC}

CD rip -> SSRC 16/44 Intermediate 95% FLAC 0

The sound is much better now. More detail, more 3D. Great songs.

With the catchy song 06. The River's Too Wide Memphis is in my room. I have heard the CD with the light off, giving walks around the room, good symptom of improvement as days ago I had to do the SSRC resampling because I was not convinced the sound.

[Customer review] https://www.amazon.com/If-You-Love-Let-Know/product-reviews/B0009JB63C/ref=cm_cr_arp_d_viewopt_srt?ie=UTF8&reviewerType=all_reviews&sortBy=recent&pageNumber=1


Too late to play my loved Randy Travis.

Randy Travis - Greatest Hits, Vol. 1

https://www.amazon.com/Randy-Travis-Greatest-Hits-Vol/dp/B000002MFU

Ideal for the car: with this Vol.1 one imagines driving a truck on Route 666 heading for sunny California.  8)
« Last Edit: 21 Mar 2018, 09:14 pm by maty »

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #93 on: 27 Mar 2018, 05:10 pm »
YESSSSSSSSSSSSSSSS

Yamaha + TV

DCB + DCBx2  all with big EPCOS

TV TDT. I have less bass, less body.


Marantz + PC

DCB Big Mundorf + DCBx4 big EPCOS

Ahmad Jamal - Ahmad's Blues (1959) I LOVE this album.


foobar2000 1.4 beta 11 / Dynamic Range Meter 1.1.1
log date: 2018-03-27 19:15:36

--------------------------------------------------------------------------------
Analyzed: Ahmad Jamal / Ahmad's Blues
--------------------------------------------------------------------------------

DR         Peak         RMS     Duration Track
--------------------------------------------------------------------------------
DR15      -0.10 dB   -18.20 dB      4:06 01-Ahmad's Blues
DR14      -0.10 dB   -16.46 dB      4:16 02-It Could Happen To You
DR17      -0.10 dB   -20.56 dB      3:46 03-I Wish I Knew
DR15       0.00 dB   -18.78 dB      7:40 04-Autumn Leaves
DR12      -0.91 dB   -16.10 dB      4:16 05-Stompin' At The Savoy
DR16      -0.10 dB   -19.51 dB      4:47 06-Cheek To Cheek
DR19     -0.10 dB   -22.62 dB      3:26 07-The Girl Next Door
DR17      -0.10 dB   -19.88 dB      3:52 08-Secret Love
DR15      -0.10 dB   -17.92 dB      2:19 09-Squatty Roo
DR16      -0.50 dB   -18.37 dB      4:02 10-Taboo
DR16      -0.10 dB   -23.25 dB      3:18 11-Autumn In New York
DR17      -0.10 dB   -19.43 dB      4:44 12-A Gal In Calico
DR17      -3.06 dB   -24.40 dB      2:38 13-That's All
DR15      -0.10 dB   -18.54 dB      3:40 14-Should I?
DR17       0.00 dB   -20.67 dB      3:12 15-Seleritus
DR13      -0.90 dB   -16.19 dB      5:07 16-Let's Fall In Love
--------------------------------------------------------------------------------

Number of tracks:  16
Official DR value: DR16

Samplerate:        44100 Hz
Channels:          2
Bits per sample:   16
Bitrate:           929 kbps
Codec:             FLAC
==============================

02. It Could Happen To You [DR14]

I have more bass, more "body" than minutes before. Music with more energy. More blunt and dry percussion. More pleasant. More credible.

Where is the subwoofer:D


10. Taboo [DR16]

Tambourine saucers are more present.

More detail too in this LIVE sound. Yes, 1959, awesome.


12. A Gal In Calico [DR17]

The piano has less distorsion!


16. Let's Fall In Love [DR13]

Again, where is the subwoofer? Clear applause.


I am very happy.

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #94 on: 27 Mar 2018, 06:15 pm »
Eagles - Hotel California (1976) Vinyl, Original US


The best pressing and the best HC rip.

foobar2000 1.4 beta 11 / Dynamic Range Meter 1.1.1
log date: 2018-03-27 20:10:24

--------------------------------------------------------------------------------
Analyzed: Eagles / Hotel California {US}
--------------------------------------------------------------------------------

DR         Peak         RMS     Duration Track
--------------------------------------------------------------------------------
DR15      -1.23 dB   -18.96 dB      6:30 01-A1 Hotel California
DR13      -1.53 dB   -18.50 dB      5:05 02-A2 New Kid In Town
DR15      -0.01 dB   -17.36 dB      4:46 03-A3 Life In The Fast Lane
DR13      -2.38 dB   -20.72 dB      4:57 04-A4 Wasted Time
DR11      -6.44 dB   -22.97 dB      1:24 05-B1 Wasted Time (Reprise)
DR14      -1.16 dB   -17.66 dB      4:10 06-B2 Victim Of Love
DR16      -1.85 dB   -21.91 dB      3:58 07-B3 Pretty Maids All In A Row
DR14      -0.47 dB   -17.22 dB      5:11 08-B4 Try And Love Again
DR13      -1.12 dB   -18.71 dB      7:22 09-B5 The Last Resort
--------------------------------------------------------------------------------

Number of tracks:  9
Official DR value: DR14

Samplerate:        96000 Hz
Channels:          2
Bits per sample:   24
Bitrate:           2666 kbps
Codec:             FLAC
====================================


01. A1 Hotel California [DR15]

Glorious. Bass, body, detail, vocal too. Guitar. If I even started singing! and the feet are not still. Again, glorious.

It sounds for the third time.

I had to get up from the chair. I was shaking my head following the rhythm!

EMOTION


It is the first time that the song has moved me. The sound was always excellent but lacked emotion. You know, very good sound without emotion is not the same.

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #95 on: 27 Mar 2018, 07:35 pm »
Cardinal S02E03 "Terri"

https://en.wikipedia.org/wiki/Cardinal_(TV_series)

Code: [Select]
Audio
ID                          : 2
Format                      : AC-3
Format/Info                 : Audio Coding 3
Codec ID                    : A_AC3
Duration                    : 42 min 40 s
Bit rate mode               : Constant
Bit rate                    : 384 kb/s
Channel(s)                  : 6 channels
Channel positions           : Front: L C R, Side: L R, LFE
Sampling rate               : 48.0 kHz
Frame rate                  : 31.250 FPS (1536 SPF)
Bit depth                   : 16 bits
Compression mode            : Lossy
Stream size                 : 117 MiB (17%)
Service kind                : Complete Main
Default                     : Yes
Forced                      : No


1' 20"

I had been waiting for days to hear the sound of rain on the lake with the MUNDORF. Much better sound, more detailed, more intelligible voices.


5' 20"

Scene at the bar. It seems that I am there or it in my room. Many background noises and conversations but that of the characters has great clarity.


To will continue...

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #96 on: 28 Mar 2018, 08:56 pm »
Youn Sun Nah ‎– Lento (2013), vinyl

https://www.discogs.com/es/Youn-Sun-Nah-Lento/release/4507300


DR13

[Customer reviews] https://www.amazon.com/Lento-YOUN-SUN-NAH/product-reviews/B00B5HE9LI/ref=cm_cr_arp_d_viewopt_srt?ie=UTF8&reviewerType=all_reviews&sortBy=recent&pageNumber=1

I am still looking for the subwoofer. Beautiful and clear female voice. Well separated instruments. More body.


maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #97 on: 2 Apr 2018, 06:08 pm »
Gerry Mulligan / Stan Getz ‎– Getz Meets Mulligan In Hi-Fi (1958), vinyl mono

https://www.discogs.com/es/Gerry-Mulligan-Stan-Getz-Getz-Meets-Mulligan-In-Hi-Fi/release/2511791


DR12

Glorious mono. The first theme 01. Let's Fall In Love sounds like stereo! It sounds a lot better than days ago, more addictive. 04. That Old Feeling sounds like stereo too.

CD Edition

[Customer Reviews] https://www.amazon.com/Meets-Mulligan-Hi-Fi-MULLIGAN-GERRY/product-reviews/B006YTLP8M/ref=cm_cr_arp_d_viewopt_srt?ie=UTF8&reviewerType=all_reviews&sortBy=recent&pageNumber=1

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #98 on: 19 Apr 2018, 04:17 pm »
Awesome!!!

Cornan: Audio System

https://www.computeraudiophile.com/profile/25558-cornan/?tab=field_core_pfield_3

Cornan has this ATL Hi-Fi hard in their systems:

* ATL Hi-Fi starquad JSSG DC cable and ATL AC mains starquad cable with LT3045 (12v/1A)

* ATL Hi-Fi DC Blocker Trap Filter

* ATL Hi-Fi AC mains cable and Ghent starquad JSSG DC cable with LT3045 in series (6v/500mA>5v/500mA)

* ATL Hi-Fi AC mains cable and Ghent starquad JSSG DC cable with LT3045  & Stammheims 5A HC-HPULN in series (15v/1A>14v/5A)> ATL Hi-Fi 8 conductor starquad USB cable with JSSG>

* ATL Hi-Fi AC mains cable and Ghent starquad JSSG DC cable with LT3045 in series (8v/500mA>7v/500mA)

* Gophert csp-3205II (14v/5.1A max) with ATL starquad AC mains cable and DIY Canare 4S6 with Stammheim 5A HC-HPULN in series (13v/5A>12v/5A)

* In-line ATL Hi-Fi DC blocker trap filter with DH-Labs Silver Sonic Power Power Plus & Furutech FI-E38 + FI-28> ATL Hi-Fi 200VA balanced  isolation transformer with floating secondary>

* ATL Hi-Fi starquad & star-earth wired power distributor

maty

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