It's easy to prove the StereoCoffee functions properly, whatever than means.
Just plug it in on and enjoy heavenly LDR music, although if 'space is the place' you wouldn't hear anything would you?
Your own lack of evidence and unsubstantiated statements concern many more than just your mates.
You have shown you don't have any provable credentials and you aren't willing to provide any data on yourself. So how would you interpret this magical data.
It would be a waste of time.
You aren't interested in LDR's all you want to do is prove you know better than Chris, users and the reviewers of the JAVA LDR.
WHO are you and why are you on this forum?
Your anecdotal opinion and demands are worthless because you are faceless.
If you are so obsessed with measurements and data why haven't you provided any?
You have not provided any data for LightSpeed? It must exist because LightSpeed has been around for a while and it should be current because I haven't read anything about an upgrade or redesign.
It's up to YOU to prove that the performance delighted users are having are imaginary and the reviews are fake.
Your multiple false statements never stop. If you just desist we might get some serious discussion here instead of this rubbish.
I predicted those tests weren't actually conducted. If they were then where is the evidence?
How about having enough courage to tell everyone you don't have any evidence and are just jumping on the bandwagon of attacks. Be a man!
I have emailed Passlabs with paste below ,and will await their reply.
Dear Pass Labs
I have been a member at DIY Audio since September 2004
A thread here: Chris Daley's Stereo Coffee Preamp
I have made mention at post 381 of contacting Nelson firstly... and if he is too busy then Tom ( tomchr ) followed by John Curl
The attenuator uses the NSL32SR3 LDR with three stereo inputs The image attached shows the two boards in casework which are used. As you may see there is extensive circuitry for powering the internal LED, some who say on the forum is unnecessary, however once heard ( and hopefully now measured) will prove there
is far more to LDR's than previously studied or recognized.
Power requirement for the unit is easy, being 12vAC
Unfortunately my present financial means precludes me from paying fee for measurement, however the offer is - you are free to keep the built unit that I will send for testing, I am hopeful and confident it will add greatly to your
enjoyment of music.
We are always kind to newbies who want to learn, and people struggling to express themselves in a foreign language. No need to be afraid. We are more firm with Chris because we know from past experience that he doesn't listen, and doesn't believe that he needs to learn.ferret said:
It is your claims about circuits which are the issue. If you claim something which cannot be true, then even a good measurement does not resolve the issue. If someone claims that X causes Y, and then produces measurements which show that Y is happening, this does not prove that X causes Y.Chris Daly said:
That is true, and I respect you for that. That is why I regard you as someone who needs to learn, rather than someone who is trying to con people.
On a separate issue, calling a volume control a 'passive preamp' is now accepted usage in audio so it is a bit silly to object to this.
It is Chris's claims which are being analysed. As he won't show us the circuit, we do not know whether the device is wired as he says it is. All we do know is that if it is wired as he says it is, then it won't make the LDR more linear - we know this because this would remain true however he wired it. The "education background" of anyone is not the issue; facts are the issue.robmid said:
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Hi Chris Daley,
Although I don’t have a fancy Audio Precision (AP), I can test it for you and compare vs several active preamps that I have and even test it vs a pot. I will even return it to you after testing - you just need to pay for shipping both ways.
Cheers,
X
With my basic equipment consisting of a Focusrite 2i4 and a DAC based on AKM in Cayin N3, I can get measurements like this (for Aksa Lender Preamp driving 4vpp into 3.4kohm load);
Here is a bit more challenging 20Vpp into 7kohm load but with carbon film feedback resistor:
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I’m happy to give you complete and detailed information to all of your queries concerning anything I’ve said after the measurements are published. You can answer the majority of your own questions through a bit of effort and forum review, but I’ll spare you the effort in the form of compromise. I have no responsibility to you in any capacity, but I’m happy to oblige if you are still interested at that time.
In the interim it only detracts from the relevant issues at hand.
Xrk seems to have offered and is a longtime trusted forum member, so perhaps this point will be sooner than you might imagine.
Additionally, if you are not aware your remarks are not helping your cause, or Chris’ for that matter. It’s unfortunate and sad. Attacking someone’s gender is childish and asinine.
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This is a no win engagement. First of all the claims will stand in spite of any measurements. In all likelihood the measurements of an optimized attenuator even if executed by someone highly skilled in the art will show low order distortions increasing with level quite similar to some of the Pass Labs circuits. Possibly you could prove that any claims that LDR's beat 4KTR for noise power are false, a small victory.
Again more smoke screen BS, how can the claims of the way the LED's are powered be reflected in any measurements of the LDR's??
Also to do so, and to make any assessment, you would need the "same unit" with LED's powered by the "snake oil" supply, and measured, vs the "same unit" powered either by battery or simple 7805 regulated supply.
This will then see if the LED "snake oil" supply can really make any difference to the LDR's distortion figures
Cheers George
Also to do so, and to make any assessment, you would need the "same unit" with LED's powered by the "snake oil" supply, and measured, vs the "same unit" powered either by battery or simple 7805 regulated supply.
This will then see if the LED "snake oil" supply can really make any difference to the LDR's distortion figures
Cheers George
What smoke screen, you can't measure something that can't exist?
Distortion, no physical mechanism.
Noise ingress, only pathologically flawed design (not out of the question).
Correct, the light intensity response time of the LDR's that are used, is so slow, they are their own regulator, doesn't matter what type of BS is powering the LED's.
Back to the subject of getting this whole thread that's commercially motivated moved to the "Vendor's Bazzar" Because it's not DIY as the "magic" "snake oil" circuits for powering the LED's is not shown to backup the BS claims it can do.
Cheers George
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Please excuse my interruption. I wholeheartedly agree with you.
However the problem is that the OP made his post on this forum because he had no place else to post it. I think it is incumbent on Chris to start a thread on Vendors Bazaar as he is the vendor. And AFAIK, Vendors Bazaar is free to the vendor. Then things like this thread will have a better place to be posted.
I believe that this is all addressed in the NOTES section of the Rules, Notes 6&7.
You could have a really bad PSU powering the LEDs and then have PSU intermod sidebands up to about 30Hz-ish; the LDR response time only filters HF noise in the light. This is about the only way an LDR volume control could sound significantly different from any other LDR volume control. It would be interesting to see if some people preferred this sound.georgehifi said:
Anyway, measurements are not the answer here. If a measurement seems to confirm an impossible result then there is something wrong with the measurement. If a measurement does not confirm the impossible result then a different person will say that there is something wrong with the measurement.
That would be almost impossible to make a really bad power supply to do that without meaning to, unless you purposely wanted to hobble it for an A/B comparison against something else.
Cheers George
Just like with speaker cables and interconnects you have to start somewhere. 10 years ago or so there was a very different general opinion proliferating on the Internet amongst audio enthusiasts. My feeling is that forum folks like yourself and DF and SY (DIYA RIP) had something to do with that.
I’ll take a small victory over no victory.
After all you took a stab at the Bybee, and doesn’t seem to have phased JC.
Slowly the layers of the onion come off.... even more slowly perhaps when dealing with matters of belief.
YouTube
Also from my short time with an LDR, my opinion is that it sounds too audibly different from almost all other examples I’ve tried like a dcb1 etc. to have a benign, negligible impact.
My guess is Chris’ design will be moreso than Vincent’s.
Of course this is dependent on implementation but my hunch is the difference to an accepted baseline / controls won’t be minor.
I’m also happy to admit if I’m wrong. That’s part of the deal when you advocate transparency.
However, still stands that I believe it is ethically imperative to demand accountability regarding claims by commercial audio, especially those who make rather outlandish marketing claims in a dubious manner.
So, my goal is not to say: told you so Chris! It’s not any good!
I don’t know. I have some ideas but no one cares anyway, or if they do they shouldn’t.
My goal is to make a small contribution to increased transparency and honesty, something the audio business has been struggling with for some time.
A lot of small contributions and then change begins to unfold.
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lol..... it was once a polly tito ...and then "Are you all sitty comftybold two-square on your botty? Then I'll begin".. they all had missing teeth.... as did their audience... that's life and those that live it...
https://lbbonline.com/news/johnny-rotten-urges-viewers-to-love-your-teeth-or-end-up-like-him/
watch and then brush !!! or not... depending on your financial aspirations...
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