napfkuchen
Senior Member
The delay is not acceptableSo this is the earliest you could have the review.
The delay is not acceptableSo this is the earliest you could have the review.
The PCM5102A (can't find a 5102S) is a stereo part, so are you saying both DACs in each chip are used per one AVR channel in some kind of an interleaved oversampling mode?
In qty. 100, the price of this part is about $4.50-4.90, compared to about $24.80 for ESS9026PRO, which has 8 channels and is used in the A6A/A8A. So if indeed at least 8 PCM5102As are used in the 3800H, it must have been a very sweet deal, or there was an insufficient availability of the ESS part for the expected production volume of this AVR.
It’s not. It’s a stereo DAC. TI has no (active) 8-channel DAC’s that compete with AK4458 on THD.The PCM1795 (8 channel IC)
those were measured before the fire so theyAccording to the French preso, the X3800H, X4800H and X6700H each have 8 pcs. of PCM5102A; only the X8500HA and A1H use ESS parts (but not of the highest PRO tier, as in the A6A/A8A). So if those TI DACs were the dominant source of the subpar measured performance of the X3800H in pre-amp mode, the same should have come out of the X6700H's measurements. But it did not (~99.5 dB SINAD in the second unit @amirm tested). So how do you explain that?
My mistake, thank you.It’s not. It’s a stereo DAC. TI has no (active) 8-channel DAC’s that compete with AK4458 on THD.
those were measured before the fire so theyprobablymost likely used AKM chip
The PCM5102A (can't find a 5102S) is a stereo part, so are you saying both DACs in each chip are used per one AVR channel in some kind of an interleaved oversampling mode?
In qty. 100, the price of this part is about $4.50-4.90, compared to about $24.80 for ESS9026PRO, which has 8 channels and is used in the A6A/A8A. So if indeed at least 8 PCM5102As are used in the 3800H, it must have been a very sweet deal, or there was an insufficient availability of the ESS part for the expected production volume of this AVR.
Sorry, that was a typo, of course it is the 5102A. I am just saying that the 3800 would have about 8 pcs of the PCM5102A and more for the 4800, 6800 and the corresponding Marantz models, so D+M have to purchase a huge numbers especially when including the very similar 5101 used for Z2/Z3 and network. As such they should be able to negotiate with TI for a much better deal than those who only need qty.100 or even 5,000. That's not speculation but a fact of life.
The PCM1795 (8 channel IC) has about the same SINAD as the AK4458 but much better SNR/DR actually costs less on per channel basis and it was used in the Marantz AV8801 and Denon AVR-4520, so D+M is experienced in implementing that chip. That's another reason why I think D+M somehow got an irresistible deal from TI, who might have tons of those 32 bit but low SINAD PCM5100 series chips. Again, all we can do is to speculate, because it is puzzling why D+M would go with such a low spec (relatively speaking) stereo DAC IC unless in doing so they could lower the cost.