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Never been able to keep a tube power amp for more than a one day listening in my systems, in the last 45 yrs.

Initially I was interested in a comparison between the two measurement protocols, (mine with a multitone signal generated with Matlab and analyzed with a National Instruments DSA) (PXI 446x series), and with a recently acquired E1DA Cosmos ADC, driven by Multitone analyzer. The two protocols...

Topping D90MQA reassessed with Cosmos ADC/Multitone Analyzer

M1SE reassessed with Cosmos ADC/Multitone Analyzer

"The MONO mode improves the SNR/DR for 3db, so a grade-A unit typically has SNR 125db(A) in STEREO mode. MONO/STEREO modes are switchable by the UAC2 volume commands, for example, if your Windows volume slider position is less than 50%(0 to 49%) the device works as 2 channel ADC, if more than...

I'm testing a Topping D90MQA using Cosmos ADC and Multitone Analyzer software. Balanced cables connect both channels. Multitone Test goes ok, but I noticed a 6dB difference between the R and L channels (R > L). Results are the same on a different laptop. I tried to make a recording of a 1 kHz...

Thank You, So mine should be considered grade A as I ordered at Audiophonics.

I've just received a Cosmos ADC and a Cosmos APU. I tried the ADC with no problems, fine device indeed. Just one doubt. As You can see in the photo, I ordered a grade A but it looks like there is a B on the board. In different sites online, an A is on the board, for a grade A ADC. Am I wrong...

(I'd say 'technology')

Ansuz is run by the same marketing people that were previously at Nordost...

True, conclusions are clearly inadequate, further citing a preceding paper about a possible correlation with a listening test, which was criticized as arbitrary at the time. As I told before, my scope was much more limited in presenting the Audio Review's paper. Propagation speed had been cited...

It's perfectly possible, especially after reading the first paper of the series, containing those arbitrary correlations.

True, the conclusion cites a preceding test, comprising listening sessions that were described by a different author, (and were widely criticised for what seemed arbitrary correlations). However my point was about how even correctly measured parameters percolate through the pores of an...

1) It's about speaker cables. 2) it's not about supporting Nordost claims. Audioreview's paper explains how to make an estimate of field propagation speed in the experiment. With your statement 'what a bunch of nonsense' are you saying that it isn't an allowed physical estimate? Did you...

A well written paper comprising the 'speed of light 'argument is here, unfortunately it's in italian, and a pdf. https://www.audioreview.it/documenti/tecnica/AR263_SUONO_DEI_CAVI_DI_POTENZA.pdf The experimental setup for the measurement session is however clearly explained.

An intriguing way to say 'OCC'? Marketing at its best.

May be it's even more interesting that some (real) flatearther calls us skeptical (*) 'flatearthers'. (*) I'm not just skeptical, I use some Nordost blue haven signal cable (I got it used for the 15% in price). The best thing I can say about is that it's 2 metres long, which is useful in my...

Cables are just an aspect of the whole business. 'QPOINT RESONANCE SYNCHRONIZER The QPOINT Resonance Synchronizer emits a subtle field which manipulates all electromechanical resonances within its immediate proximity so that they resonate in unison with each other. By syncing these...

Of course. I tried to ask: which system(s) actually allow to listen to differences? Answer is still in travel.

Nordost is beyond fashion.