Marantz SA-10 Vs Esoteric K-05Xs

@goose thank you for the information. The new XD models by Esoteric look to use their own in-house DAC that now converts everything to DSD 512. The previous gen XS units used AKM brand DACs and gave the option on CD to not upsample or to go to higher resolution PCM or DSD512. This is that I gathered from reading the user manuals and specs on reviews. The Matantz SA-10 dose a PCM to DSD upsample on all discs as well. But I’m sure they would have a different sound.

Below were the models I was interested in (pre-owned)

Marantz SA-10 

Esoteric K-07XS, K-05XS, K-03XS

Technics SL-G700

FWIW, I have the Marantz SA-10 (purchased new), and it has been a great disc spinner and transport when I want to output a digital signal. It has mated well with an LTA Microzotl Pre (Level 2), Luxman C900u, and my current NAD M66. Both are highly resolving pre-amps—I don’t feel that the Marantz is leaving much, if anything, on the table in terms of resolution when compared to the best. When comparing the analog and digital outputs, information is the same, just a small difference in presentation between the internal DAC and an external one.

I enjoy both SACD (mostly classical) and regular CD (all genres) on the SA-10 and have no regrets with the purchase. I expect it to be in my system for a long time.

Here is what the K-03XS manual says about upsampling:

Upconversion setting UPC>***

This setting can be made for each input.

During Super Audio CD playback, the DSD signal is sent as is to the D/A converter without being upconverted.

ORG - (original) The input signal is sent as is to the D/A converter without being upconverted.

2Fs - 32kHz, 44.1kHz and 48kHz sources are upconverted to double values of 64 kHz, 88.2 kHz and 96 kHz, respectively, and then sent to the D/A converter.

4Fs - 32kHz, 44.1kHz, 48kHz, 88.2kHz and 96kHz sources are upconverted to double or quadruple values of 128 kHz, 176.4 kHz or 192 kHz and then sent to the D/A converter.

8Fs - 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz and 192kHz sources are upconverted to double, quadruple or octuple values of 256 kHz, 352.8 kHz or 384 kHz and then sent to the D/A converter.

16Fs - 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz and 384kHz sources are upconverted 16, 8, 4 or 2 times to 512 kHz, 705.6 kHz or 768 kHz and then sent to the D/A converter.

DSD - The signal is converted to DSD digital format, and then sent to the D/A converter

So it appears you can not upsample at all, or you can upsample from 2X all the way up to 16X or DSD for each output.

@goose @tomcy6

Since it says the upconversion upsample mode is available for each input (except that a SACD is passed through staying at DSD) does it allow for these settings on normal CD playback? (Picture below).

This is from the K-05XS and K-07XS manual download PDF about upconversion.

It says it available by pressing the Mode button on the front of the unit, but it appears there isn't a Model button on the remote. So you can only make these settings on the unit itself? That's a bit inconvenient.

For filtering, it says

Digital filter setting during DSD playback.

DSDF>*** OFF No digital filter is used . ON A digital filter is used .

So it looks like there is only 1 filter available (on). Some players give multiple filters (3-6)

The SA-10 has been replaced by the new Model 10 SA-CD player. Coming in at 75-76 pounds this is a very large and heavy unit. The Model 10 is about half again more expensive  than the SA-10 it is replacing.