A novel way to massively improve the SQ of computer audio streaming

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14 minutes ago, austinpop said:

Those are some nice value LPSes!

But torriods and poor diode bridge. Even better,

 

https://www.ebay.com/itm/Finished-100VA-Ultra-Low-Noise-Linear-Power-Supply-Ouptut-9v-12v-19v-24v-R1716/141770497380?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

 

My one has copper foil over r-type. Used same but little less VA for Mini power for over year. But no LPS-1.2 to compare.

 

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53 minutes ago, Evo-No-Revo said:

"Audiophiles are the homeopathic healers of the electrical engineering world..."

Great sig!

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3 hours ago, lmitche said:

What would be a better diode bridge? I had a similar r-type fail here last week, so I'm not going there.

Schottky or fast-soft recovery. old thread- http://www.audiocircle.com/index.php?PHPSESSID=to08c9823o57uqska3vi7tptabf3c057&topic=20682.msg183220#msg183220

 

What similar fail?

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7 hours ago, jean-michel6 said:

The results are as follows in term of better SQ 

 

standard << canare << Gotham <~ Neotech 

 

Sorry, but not clear from text which is best SQ & which less-so ?

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5 hours ago, mozes said:

The JSSG 360 really takes the Lush to another level

Does Lush cable already have some shielding ? Is known what kind ?

Curious how much shielding change is JSSG 360 to original.

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1 hour ago, lmitche said:

using two cables instead of one, such as we have seen done by Cornan. With four conductors in a cable this was a straight forward use of the GAC 4.

What is wiring of 8 conductors?

My thinking is important to impedance lowering that full circuit (V+, V-) in (each) star-quad cable.

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9 minutes ago, Cornan said:

15 minutes ago, BigGuy said:

"Efficacy of concept" betterer?

 

Efficiancy of concept

little English(!?) clarification.

Efficacy - the power to produce an effect

Efficiency - performing or functioning in the best possible manner with the least waste of time and effort

 

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11 hours ago, lmitche said:

analog interconnects from Omega Mikro which are very thin copper ribbons covered with transparent film as insulation. The construction is fragile, and would not survive insertion into a tinned copper sleeve.

High probability insertion destructive, but should easy survive following leader line through sleeve. Tie wire or string leader behind connectors. Thread through sleeve. Pull through & remove leader, done

Recently watch electric company pull 13.2KV conductors through temporary sheaves from 3 color coded poly leader ropes up on tall poles. Later manually hooked over to new polymer insulators before energized.

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45 minutes ago, Solstice380 said:

found this tech note on electronics. 

 

http://ww1.microchip.com/downloads/en/AppNotes/00001767a.pdf#utm_source=&utm_medium=MicroSolutions&utm_term=&utm_content=MSLD&utm_campaign=AN1767

 

"it is important to note that it is always essential that a Faraday shield be grounded. A floating or open-circuit shield almost invariably increases capacitively coupled noise."

 

But JSSS & JSSS-360 shielded cables not grounded (by design). Any theories why they so effective?

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1 hour ago, Em2016 said:

I think both floating and signal grounded can be effective if you read John's words.

Sorry, think distinction is distraction  

Grounding can bring noise & drain it. Bigger antenna for noise? Drain impedance?

Floating shield smaller antenna(s). Maybe sink RF in capacitance between shield layers?

Only questioning thoughts, but audio system RFI mechanisms not addressed with who said what, when.

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23 minutes ago, Superdad said:

However, as I posted about 18 months ago, Oyaide did change to a new, smaller style that I find near-impossible to use for wire of any decent gauge.

 

23 minutes ago, Superdad said:

Belden 9418 shielded star-quad wire we use for the cables we supply with the JS-2 is 4 conductors of #18. Pairing #18 equals about a #15--plus the shield tied at one end.  Now you understand why the new ones are impossible for us.  It is tight enough with larger original ones!

 

Got Oyaide right angle connector from Ghent special order. Looks like new version straight one with shorter sleeve & tab. Used with same Belden quad cable, was tight but possible (but not production). Forgot some heat shrink in too hurried assembly & even with custom tape pieces, tightened sleeve caused intermittent short (nice current limiting in LT304xs  ). Now fixed and sound good.

 

Extra JSSS wire made sleeve assembly difficult but still possible. JSSS-360 have to wait, enough DIY for while.

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5 hours ago, lmitche said:

I am an upsampler in a world full of (what's the word?) non-samplers (no), un-samplers (not right), regenerators (already taken), or samplers (makes sense I guess but boring).

Maybe "same-old-sampler"?

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8 hours ago, BigAlMc said:

on behalf of those of us intrigued by the JSSG 360 but daunted at the prospect of tackling it, kudos on being one of the first cable manufacturers to offer it ready made! 

Yes, Phasure is cool with subject, but Ghent Audio is really first with commercial JSSS-360 product, appearing just days (week?) after emerging from these pages!

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7 hours ago, afrancois said:

All I can say is that my system never sounded like it does now. Extreme shielding does payoff.

Happy to know your results with 'Extreme' shielding. Theory is attractive, but needed experimental results

I know of mu-metal for long time, but not interested because of problem with losing effectiveness due to even little bending of metal, and high cost too.

How do you see issue of bending degradation?

How much cost to you per cable (averaged with overhead)?

 

Pleased for your SQ level, also jealous 

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41 minutes ago, afrancois said:

A sheet of mu-metal 15 cm x 100 cm costs 105 euro. Cost is acceptable for what you get. I guess the price per 50 cm is about 40 euro,  ISO tape and heat-sink tube included

How many shielded cables per 15/cm x 50, you estimate?

What is "ISO tape?"

 

45 minutes ago, afrancois said:

I lose nothing (I think) while bending because I'm using more windings. More overlap as you will.

So spiral winding, about how many turns? (not sure what is what in pictures)

 

48 minutes ago, afrancois said:

My cables also have JSSG360 before applying the mu-metal.

Ha! Multi-stages of shielding, like multi-stages of DC regulation, for extreme results  

 

Also suggest polystyrene tubing instead of PVC. Available in small sizes for cables, plus thinner wall, maybe better fits. Capacitance performance better, but is that right for this application?  Time to test  

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40 minutes ago, afrancois said:

hope some other CA members will try to experiment with this. I feel it really helped.

Now interested in trying this, but must wait for some DIY time & extra $$. maybe after leaves raked up 

 

Thx! for sharing work & answers to many questions.

Last question  

How you cutoff 8mm strips from mu-metal sheets?

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9 minutes ago, lmitche said:

If it's what I think it is, the adhesive is tough to wash off your hands.

IIRC, dries out with age, heat, become horrible to clean off.

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46 minutes ago, austinpop said:

1 hour ago, Johnseye said:

1) Wouldn't an isolation transformer like the Topaz filter that upstream noise? 

 

2) Or are you saying the noise is coming through over the ethernet, bypassing an IT?

 

Exactly. That’s the working assumption.

Which one is assumed?

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3 hours ago, austinpop said:

Wireless bridging has its own issues, and had intermittent dropouts at higher resolutions. Since I plan to stream Qobuz, which is streams as high as 24/192, I'm not looking forward to the dropouts.

@jabbr reports recent experimental success with consistent DSD512 over wireless.

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28 minutes ago, mtcs said:

I wonder if there is a consensus

Ha ha!

 

29 minutes ago, mtcs said:

on the priority and bang for the buck.

IMO cleaning AC power can cost $$$$ hardware, maybe services. But in cost/benefit equation, consider that all electronics improved together- analog, digital, audio, video, &c. 

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4 minutes ago, seeteeyou said:

Once again Roy also talked about why double regulated is better than single regulated counterpart here

 

https://www.computeraudiophile.com/forums/topic/30376-a-novel-way-to-massively-improve-the-sq-of-computer-audio-streaming/?page=361&tab=comments#comment-860642

On August 10, 2018 at 3:01 AM, romaz said:

Regarding power supplies for this NUC board, yes, it scales extremely well to power supplies and better than my DFI board.  This board can accept 12-19V.  During my testing with my SR7s, 19V sounds a little better than 12V but DR (double regulated) 12V sounds considerably better than 19V.  The ideal SR7 for this board would likely be a DR 19V which I do not have.

 

My DIY experience with multi-stage regulation very positive for SQ. May do more in future (got low hanging fruit).

 

But confused about 12-19V range from @romaz quote. I unaware of (non-ps) circuitry consuming 19V, thought input V all down converted to 12v, 5v, 3.3v, 1.?v or similar. Clarification of what-is-what in load through the 12->19V range, maybe helpful to understand why "19V sounds a little better". Maybe point way to dropping inconvenient high voltage requirement? 

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45 minutes ago, seeteeyou said:

Roy should have explained something about current draw and voltage back in March 2017

Yes, Thx!  Was nice balancing of I vs E over Noise, but theory not implementation. 1st question remains, but now details of regulation/conversion stages interesting.

 

Reading @romazmulti-subject reply post saw most answers consist of balancing of factors. I recognize mind of engineer- to know & balance many factors to achieve multiple goals. Also sometimes hear from other posters, but this one clear & comforting (so needed here & now  )

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18 hours ago, lmitche said:

Adding the 3 amp Mpaudio lt3045 regulator after the 13.5 volt AMB Sigma 11 results in the worse sound of the three options

Maybe ~1000mfd Kemet (or other) output caps are problem. I & others have removed them with improved SQ. Think app sheet only say 10mfd. Worth experiment?

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1 hour ago, lmitche said:

The outcome was a surprise indeed. Your approach is interesting.  Can you share a picture of the result please?

Picture? No-

Experience was with Ldovr (1A) modules. 1st added 2 560mfd Kemet alu polymer caps to output per recommended by 'enthusisatic experimenter' (based on MPAudio module configuration). Not like sound, like some other CA people, so removed caps & very happy with SQ+.

So suspect MPAudio modules (not have any here) maybe benefit with removal of output caps, but think recall from spec sheet that 10mfd recommended for ?? Research maybe good before proceeding with removal 

So with ~4 listening reports & Superdads explanation of LT304x output bandwidth vs caps, I think worth experiment to gain benefits of high(er) current LT3045 regulation!

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On September 27, 2018 at 4:50 PM, lmitche said:

Adding the 3 amp Mpaudio lt3045 regulator after the 13.5 volt AMB Sigma 11 results in the worse sound of the three options.

 

1 hour ago, lmitche said:

Thanks and yes I have removed the kemet caps on the output side of my ldovr lt3045 cards. I still like them on the input side.

 

?? Not talking about ldover modules, but MPAudio. What will SQ change without output caps on you 3 amp Mpaudio lt3045 regulator?