Oppo UDP-205 lettore player universal UHD 4K anticipazione!

[Giorgio Manfredini]

Comunque capisco la novità, capisco tutto ma non mi sembra un prezzo molto basso in assoluto...
Si sa niente del Cambridge?

[Deimos7777]

Auguri new77 :-). Facci sapere appena arriva. Soprattutto se accetta audio HD dalla porta IN.

Se ci fermiamo a pensare...sono quasi 4 milioni di lire...per un lettore bluray.. è una enormità. Ma tutto è anche relativo, dove c'è Gusto...

[new77]

grazie Deimos... si appena arriva lo spremo per benino...

[Dagomonte]

Il lettore Cambridge Audio UHD dovrebbe uscire in commercializzazione a Luglio, sarà fatto sulla base del 203..

[adslinkato]

Beh, tutta un'altra storia, quindi...
Poco attinente a questa macchina...

[Giorgio Manfredini]

Se la base di partenza è quella del 203 almeno per la parte analogica che interessa a me siamo ancora indietro.
Conentisimo per chi lo ha già ordinato...la mia era una semplice considerazione di carattere economico anche se alle passioni si comanda ben poco.
Il fatto è poi che Oppo non è un'azienda tipo Samsung dove poco dopo l'uscita il prezzo dei sui prodotti crolla per cui dobbiamo prendere atto che questo pezzo da 90 difficilmente andrà sotto i 1700...peccato...speriamo in un clone Cambridge con prezzi + umani...che poi sarebbe la mia prima scelta...

[gnagno1947]

Auguri new77 :-). Facci sapere appena arriva. Soprattutto se accetta audio HD dalla porta IN...

Quale porta IN? Ce ne sono 7.....

[leone250]

Forse si riferiva agli ingressi digitali.

[new77]

suppongo hdmi in... io lo proverò come dac su spdif e usb... dubito sia confrontabile al mio dac ma.. mai dire mai!

[Deimos7777]

Quale porta IN? Ce ne sono 7.....

si mi riferivo alla HDMI, perdonami non ho specificato, ma credevo si capisse. "accetta audio HD dalla porta IN" sulle analogiche non vi è mai stato un problema di gestione del segnale audio sui precedenti modelli. Come ben sappiamo invece i precedenti 103/105 non veicolavano l'audio Bitstream del flusso HD.

[gnagno1947]

Mah, secondo il manuale di impiego e delle specifiche la hdmi in dovrebbe accettare audio 7.1/192 in LPCM ed audio 5.1 in DSD e streaming.
Poi naturalmente saranno le prove a confermarlo ....

[gnagno1947]

copio ed incollo da AVSforum alcune osservazioni che potrebbero interessare chi ha intenzione di usare l'Oppo 205 come pre-processore digitale

"CONNECTING THE OPPO 205 DIRECTLY TO A POWER AMP

For those looking to try this, I have some specs for you, hot off the press:

The output impedance of the RCA Analog outs of the 205 (both multi-channel and dedicated stereo) is 100 Ω.

The output impedance of the dedicated stereo XLR Analog outs of the 205 is 50 Ω.

The rule of thumb is that the amp input you are going to connect to should have a minimum input impedance 10 to 15 times the output impedance of the OPPO. But be aware that the input impedance of some power amps can vary according to frequency. Quite a bit. So it is best to be conservative here

For those curious, the output impedance of the RCA Analog outs of the 203 is 200 Ω.

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I'm still working on getting some recommendations on target Volume level for the 205, above which you can be pretty much guaranteed that dynamic range will be preserved and the noise floor suitably suppressed. But generally speaking, you want to set up so that you are using the higher end of the Volume range in the OPPO. If the gain of your amp is too much to achieve a comfortable listening level at higher Volume settings in the OPPO then you should consider putting high quality attenuators in the Analog path between the OPPO and the amp.

Again, I want to emphasize that the Analog outs of the OPPO are designed to be connected to the inputs of a pre-amp. OPPO will not be selling the 205 (much less the 203) as a substitute for a pre-amp. But if you want to try a configuration where the player is directly connected to a power amp -- as many have already done with the OPPO 105 and 105D players -- these are the considerations to bear in mind."

[gnagno1947]

E questa è la seconda parte della questione OPPO 205 usato come pre-digitale

"CONNECTING THE 205 DIRECTLY TO A PWEWR AMP -- Part 2

In my post above I talked about "impedance" considerations in connecting the Analog outs of the OPPO UDP-205 directly to a Power Amp -- no pre-amp in between. Now I want to talk about Volume.

A key difference in connecting directly to a Power Amp is that the Amp is not likely to offer Volume control -- or call it "Gain" control. That means you will be relying on the Analog output Volume control provided by the 205 itself.

Power Amps have different "Gain" characteristics, and if the Gain of the Amp is too large (and your speakers too "efficient") you will need to use a very low Volume setting in the OPPO to achieve a comfortable listening level. That raises the question whether a low Volume setting in the OPPO affects the audio quality. And if so, how low is TOO low?

For folks new to this, an important concept here is that the Volume control in a device like the OPPO does not "amplify" the output. The 205 is designed to put out a "full scale" signal. That is, the max Volume setting of the 205 (a Volume of 100 -- or the Output "FIXED" setting, which does the same thing) puts out the Analog audio signal the player is DESIGNED to put out. It's very BEST signal.

Instead, lowering Volume below 100 "attenuates" the full scale output -- lowering the output volume below that of the "best" signal. But how does that affect audio quality? Does it even make a noticeable difference? There are two considerations: Dynamic Range and Noise Floor.

The first takeaway here should be that Dynamic Range is not a problem in the 205. Here's how we get to that result.

The Analog output Volume control in the 205 is implemented at very high quality -- in the 32-bit DACs of the player. That is the Dynamic Range of the Volume control itself is 32-bit. But the max dynamic range of the content you can PLAY in the OPPO is 24-bit. That gives us 8 bits extra.

Each bit of precision is equivalent to 6dB. So that says you could lower Volume by -48dB below full scale and have ZERO effect on the Dynamic Range of the Analog output stage for the content this player can play.

But wait! There's more!

The Noise Floor of the 205 is -120dB below full scale. That is to say any portion of the content which is recorded -120dB, or lower, below full scale is going to be "in the noise".

The maximum potential Dynamic Range of a 24-bit digital audio stream is 144dB. So the lowest 24dB of that will be "masked" by the Noise Floor. What's left gives the maximum perceivable Dynamic Range of the Analog outs: 120dB.

Combining these two results says you could lower Volume a whopping -72dB and still have no effect on the perceived Dynamic Range (i.e., after amplification to a comfortable listening level through a high quality Amp).

----------------------------------------

So what's the problem? The PROBLEM is that -- and this is another key concept -- attenuating the output signal does NOT also lower the Noise Floor! So if you set volume -72dB down (a Volume setting of 28 in the OPPO), you will have lowered the signal you WANT to hear 72dB closer to the Noise Floor. Or to put it another way, you've raised the Noise Floor to -48dB!

When you put that Analog output signal through a high Gain Power Amp to get things back to a comfortable listening level that Noise Floor -- now only -48dB below the loudest portions of the content -- ALSO gets amplified. And may very well become noticeable, particularly in a quiet listening room.

So that raises the question of how high is too high for the Noise Floor? There's no pat answer for that. But as a straw man, let's suggest that for high quality listening you don't want the Noise Floor to be closer than -90dB below the loudest portions of the content.

As I said above, the Noise Floor of the 205 is -120dB below full scale. So that gives us 30dB of Volume control to play with!

In the 205, Volume is implemented as -1.0dB per step below Volume 100. So that says you should TARGET a setup where you can get a comfortable listening level without having to lower Volume in the 205 below Volume 70. Higher is better, but 70 is fine.

If you decide you prefer to be more or less conservative regarding this Noise Floor straw man, you can do the easy math to adjust that TARGET Volume to taste.

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So what if the Gain in *YOUR* Power Amp is so high that Volume 70 in the OPPO wakes the neighbors and knocks plaster off the walls? Well that says that your Power Amp is not, by itself, a good "match" for the *DIRECT* output of the 205.

One solution, of course is to put a pre-amp between the OPPO and your Power Amp. The pre-amp provides Volume control and so you can leave the Analog output Volume of the OPPO at 100.

Another solution is to invest in some high quality "attenuators" which you will put, in-line, between the OPPO and the Power Amp, so that you can keep Volume in the OPPO at 70 or above (assuming our straw man example here) while achieving a comfortable listening level.

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Now does that meant the signal is going to turn to crap if you lower Volume below 70? Of course not. You may very well want to use lower Volumes when you are not doing "critical listening" for example -- perhaps late at night depending on the persnicketiness of the neighbors. In most such cases you will probably NOT notice a decrease in audio quality.

But if you TARGET a setup where you are commonly using, say, Volume 30 for critical listening then you are not using the hardware of the 205 to best advantage. "

[Steven]

E adesso passa alla traduzione gnagno!!!

[Deimos7777]

ci starà lavorando...