I DAC di John Kenny

Edmond Dantes ha scritto:
Ho sempre riscontrato analoghi problemi anche sulle elettroniche non di potenza, con particolare riferimento agli stadi phono, anche di livello molto alto. Peraltro non ho mai ascoltato lettori digitali integrati a batteria (mentre DAC si), ma ho sempre riscontrato miglioramenti più importanti con l'inserimento di trasformatori di isolamento piuttosto che con batterie.

Edmond Dantes ha scritto:Grazie molte. Ho apprezzato molto lo Young, anche se non mi ha convinto fino in fondo nel mio sistema ad alta efficienza, che bastona immediatamente sistemi incapaci di restituire la profondità propria delle incisioni, la dove esiste, naturalmente.

Queste tue prime impressioni mi intrigano molto verso il piccoletto, che potrebbe essere la quadratura del cerchio per un buon periodo......

Hai qualche trasformatore economico da suggerire ?

Tanto per tirar l'acqua al proprio mulino Laughing hai mai sentito il Metrum ?

Edmond Dantes ha scritto:Ho avuto in prova a casa diverse ciabatte filtrate (anche se non da fascia altissima). Quelle che ho più apprezzato sono state quelle della KE, ma l'introduzione di un distributore di corrente con trasformatore d'isolamento è stata la scelta vincente.

Edmond Dantes ha scritto:

Tanto per tirar l'acqua al proprio mulino Laughing hai mai sentito il Metrum ?

No, mai sentito. Approfondirò......... Lo consideri di alto livello?

Spara un modello e un prezzo cosi ci orientiamo, grazie.

flovato ha scritto:

Tanto per tirar l'acqua al proprio mulino hai mai sentito il Metrum ?

donluca ha scritto:ohhh sono proprio contento che tutto si sia risolto per il meglio!

Ottime impressioni a quanto sembra, JK ha fatto centro

Per migliorare il basso magari prova a far fare qualche ciclo di carica/scarica alla batteria del dac, sapevo di questo trucco per gli amplificatori per cuffia a batteria, chissà se funge pure per i dac!

MDT360 ha scritto:

flovato ha scritto:

Tanto per tirar l'acqua al proprio mulino hai mai sentito il Metrum ?

Io ho provato a collegarlo all'amplificatore ma non si sente niente, dove sbaglio?

Il dac è questo qui

This is a quotation from Bob Katz, well known recording & audio mastering engineer posted here http://www.digido.com/audio-faq/j/jitter-better-sound.html

After an engineer learns to identify the sound of signal-correlated jitter, then you can move on to recognizing the more subtle forms of jitter and finally, can be more prepared to subjectively judge whether one source sounds better than another.

Here are some audible symptoms of jitter that allow us to determine that one source sounds "better" than another with a reasonable degree of scientific backing:

It is well known that jitter degrades stereo image, separation, depth, ambience, dynamic range.

Therefore, when during a listening comparison, comparing source A versus source B (and both have already been proved to be identical bitwise):

The source which exhibits greater stereo ambiance and depth is the "better" one.

The source which exhibits more apparent dynamic range is the "better" one.

The source which is less edgy on the high end (most obvious sonic signature of signal correlated jitter) is the "better" one.

And a reply:
The better one, and it is better, is also easier to listen to. . . less fatiguing. I would also add to this that the low end just "feels" bigger and more solid. This is perhaps a psychoacoustic affect more than a measurable one. It may be that the combination of a less edgy high end and greater depth and width makes the bass seem better.

All of this makes sense if thought of in terms of timing (that is what we're talking about isn't it ;-]). With minimal jitter nothing is smeared, a note and all its harmonics line up, the sound is more liquid (a term probably from the "audiophile" crowd but one which accurately describes the sound none the less), and images within the soundstage are clearly defined.

jkeny ha scritto:I'll reply via PM

Edit: Oh hell, I'll reply here - it's too difficult to navigate around this site in translation

The Naksa 70 is the amplifier that I have. It's provided by Hugh Dean from Aspen Amplifiershttp://www.aksaonline.com/products/products_NAKSA70.html

Yes, I can say that it is one of the best solid state amplifiers I have heard & competes with amplifiers well above it's price range. It comes as a pre-assembled board so it just needs to be heatsinked & housed in suitable casing.

jkeny ha scritto:OK, glad this has arrived.
Just a couple of notes. there is a known issue with the DAC where at startup it sometimes needs to be turned on/off/on in order for the sound to kick in. It seems to be some initialisation issue with the chip which I'm following up with TI.

The DAC will improve substantially over the next couple of days & this may well address the bass shyness that you are reporting? But I want to draw your attention to the sound signature of lower jitter which might also address some issues.

This is a quotation from Bob Katz, well known recording & audio mastering engineer posted here http://www.digido.com/audio-faq/j/jitter-better-sound.html

After an engineer learns to identify the sound of signal-correlated jitter, then you can move on to recognizing the more subtle forms of jitter and finally, can be more prepared to subjectively judge whether one source sounds better than another.

Here are some audible symptoms of jitter that allow us to determine that one source sounds "better" than another with a reasonable degree of scientific backing:

It is well known that jitter degrades stereo image, separation, depth, ambience, dynamic range.

Therefore, when during a listening comparison, comparing source A versus source B (and both have already been proved to be identical bitwise):

The source which exhibits greater stereo ambiance and depth is the "better" one.

The source which exhibits more apparent dynamic range is the "better" one.

The source which is less edgy on the high end (most obvious sonic signature of signal correlated jitter) is the "better" one.

And a reply:
The better one, and it is better, is also easier to listen to. . . less fatiguing. I would also add to this that the low end just "feels" bigger and more solid. This is perhaps a psychoacoustic affect more than a measurable one. It may be that the combination of a less edgy high end and greater depth and width makes the bass seem better.

All of this makes sense if thought of in terms of timing (that is what we're talking about isn't it ;-]). With minimal jitter nothing is smeared, a note and all its harmonics line up, the sound is more liquid (a term probably from the "audiophile" crowd but one which accurately describes the sound none the less), and images within the soundstage are clearly defined.

I would also add:
Now some extra points:
- listener fatigue is reduced or completely eliminated
- the sound can be turned up higher without any distortion being evident
- the sound can also be turned down lower & the full dynamics are still retained but at a lower volume
- the inner texture of the bass can be heard rather than a one note bass sound.

I would also suggest that you try the two different software drivers that you can use with this DAC - the Hiface drivers(24/192) OR the Young DAC drivers (32/384). There are substantial differences in sound between the two.