TOPPING D90SE Updates to D90 III Discrete

Sep 10, 2024 at 10:10 PM Post #16 of 316
T+A has a native 1-bit DSD converter in their DACs, Cen.Grand has a 1-bit DAC, PS Audio as mentioned already, and TEAC/Esoteric's newer (since 2020 or so) Discrete DAC also has a 1-bit mode. 1-bit DACs have been around for quite some time, but they're usually in the ultra-high-end.
Yeah…I bought an RU7 because it was the most affordable way to get into a 1-bit DAC for experimentation. Definitely a unique experience, but also handy since it’s a portable DAC that has pure balanced line out functionality, very handy.

-Ed
 
Sep 10, 2024 at 11:22 PM Post #17 of 316
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Sep 11, 2024 at 12:43 AM Post #18 of 316
I suppose either you’ve never seen/heard of the Cayin RU7, aren’t aware that it is a 1-bit/native DSD DAC, or know something about the D90 III Discrete and also the RU7 that makes them different and I am not aware of it.

-Ed

Really? I wasn't aware of that. Does it have a "DSD Direct" mode like AKM chips?

T+A has a native 1-bit DSD converter in their DACs, Cen.Grand has a 1-bit DAC, PS Audio as mentioned already, and TEAC/Esoteric's newer (since 2020 or so) Discrete DAC also has a 1-bit mode. 1-bit DACs have been around for quite some time, but they're usually in the ultra-high-end.
The PSRM modules are the conversion.
It's native 1 bit handled by the above implementation.

DSD and signal processing must be handled by the input interface which isn't revealed (the xmos or fpga)
 
Sep 11, 2024 at 7:39 AM Post #21 of 316
Really? I wasn't aware of that. Does it have a "DSD Direct" mode like AKM chips?
That's just marketing talk from akm side and nothing more.
All these modern chips are multibit desta sigma designs.
 
Sep 11, 2024 at 9:08 AM Post #22 of 316
So I have a D90SE (the one that can do the MQA stuff) and a Schitt Lokius. This new one has a built in EQ so essentially I could remove the Schitt from the stack and have one less thing am I reading that correctly? Beyond that, the D90SE sounds phenomenal is it really worth an upgrade?
 
Sep 11, 2024 at 9:24 AM Post #23 of 316
Yeah…I bought an RU7 because it was the most affordable way to get into a 1-bit DAC for experimentation. Definitely a unique experience, but also handy since it’s a portable DAC that has pure balanced line out functionality, very handy.

-Ed
I was thinking about grabbing one but really I have a tachmin or w/e that measures like a rocket ship for 1/4 of the price. Is there anything to this '1 bit' sound? I like my r2r dacs but I wouldn't say I could pick one out in a crowd or anything. They just sound great!

So I have a D90SE (the one that can do the MQA stuff) and a Schitt Lokius. This new one has a built in EQ so essentially I could remove the Schitt from the stack and have one less thing am I reading that correctly? Beyond that, the D90SE sounds phenomenal is it really worth an upgrade?
Depends how much you like having an eq with knobs.
 
Sep 11, 2024 at 9:27 AM Post #24 of 316
So I have a D90SE (the one that can do the MQA stuff) and a Schitt Lokius. This new one has a built in EQ so essentially I could remove the Schitt from the stack and have one less thing am I reading that correctly? Beyond that, the D90SE sounds phenomenal is it really worth an upgrade?
EQ in the digital domain as it is performs better, plus there is a preamp control to allow boosting frequencies without adding distortion. Furthermore, the Topping equalizer is PARAMETRIC, which provides WAY WAY WAY better control than the fixed Q and fixed frequency selections of the Schiit unit.

-Ed
 
Sep 11, 2024 at 7:59 PM Post #26 of 316
This pic give the impression that it's an R2R DAC?

1726099151400.png
 
Sep 11, 2024 at 8:12 PM Post #27 of 316
This pic give the impression that it's an R2R DAC?

1726099151400.png
It is a discrete, resistor ladder/based design, but the conversion is done in 1-bit DSD and ultra-high sampling rate, rather than multi-bit PCM format.

-Ed
 
Sep 11, 2024 at 8:34 PM Post #28 of 316
Is this similar to the DSD sections of the Holo DACs?
 
Sep 11, 2024 at 9:22 PM Post #30 of 316

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