Topping D30Pro Review (Balanced DAC)

[AudioSceptic]

It is just pure BS. I'm sick of it. Just stop it. Do convolution calculation and see for yourself. What the ringing does to the signal. Nothing. That's the point. You don't seem to have any fundamental understanding of signal processing. Basic understanding of sampling and conversions will get you very far. Learn Sinc function first. What it is what it does. What's sinc in time domain, what's sinc in frequency domain. Why everything has to be band limited. If not what happens. What's the ideal case of reproduction. Also think about image processing and then compare to audio. What's the difference what are the similarities. Why is audio this way. If you have all these understanding, you then can say oh this filter does what, that filter does that.
Seriously?

Seriously, I realised that you didn't understand that I was/am playing Devil's Advocate, so I explicitly stated that, and you still don't get it?

 

[AudioSceptic]

I know these things. I don’t know what you’re trying to accomplish here.

What? You asked me what I meant, even though I thought it was obvious already, so I did!

 

[JohnYang1997]

Seriously, I realised that you didn't understand that I was/am playing Devil's Advocate, so I explicitly stated that, and you still don't get it?

I really didn't know what that mean lol.

 

[AudioSceptic]

I really didn't know what that mean lol.

I do apologise. Your English is excellent, so I tend to forget that it is not your first language!

 

[mkawa]

hmm.. so this should be substantially cheaper than the su-9, but has no bluetooth. how much bigger than the a50s is this? i have an a50s right now for my bedroom system with a tempotec 4313 dac and hey, if one 4313 sounds good, why not 4? also, how is the single ended output derived? is it via balanced to SE conversion?

 

[JohnYang1997]

hmm.. so this should be substantially cheaper than the su-9, but has no bluetooth. how much bigger than the a50s is this? i have an a50s right now for my bedroom system with a tempotec 4313 dac and hey, if one 4313 sounds good, why not 4? also, how is the single ended output derived? is it via balanced to SE conversion?

17.4cm x 13.8cm x 4.5cm
SE is converted from BAL.

 

[bigredrobotninja]

Can the SE and balanced outputs be used at the same time? For example, I'd like to feed a pair of active speakers with the XLR, and a subwoofer with the RCA.

 

[JohnYang1997]

Can the SE and balanced outputs be used at the same time? For example, I'd like to feed a pair of active speakers with the XLR, and a subwoofer with the RCA.

Yes

 

[jdizzle]

From Topping, when I asked about release.

Sorry for the late reply, we have just returned from a ten-day CNY holiday. We plan to release it from the end of February to the beginning of March. But you know, this is just a plan, and we will face many challenges and variables, so I am not very sure that date. But what is certain is that D30Pro has completed its first mass production, so I am sure that it will be released soon.

 

[Rockfella]

@JohnYang1997
Is this a true balanced DAC like the SMSL SU8?

 

[JohnYang1997]

@JohnYang1997
Is this a true balanced DAC like the SMSL SU8?

It is a True balanced dac.

 

[Rockfella]

It is a True balanced dac.

Price at launch please?

 

[mkawa]

think this is going to be my bedroom dac. hope apos has a preorder discount

 

[Kane1972]

https://en.wikipedia.org/wiki/Nyquist–Shannon_sampling_theorem

If the signal is not band limited to half the sample rate, there is loss of information that can't be reconstructed

I understand that concept, but can you explain something? If we had a filter that cuts off hard at 22.05 kHz when listening to a 44.1 file, what happens when we then play a 24/96 file, will the filter automatically switch to a 48kHz LPF or do we have to chose another appropriate filter?

 

[Kane1972]

but yeah 110db attenuation with as sharp a cutoff as you can reasonably get at 22.05k would be an amazing filter to have.

But for those of use using this (or any) DAC with music at 48 or 96 kHz etc, are there filters that are more appropriate? I make music and work at higher sample rates.

 

[PeteL]

I understand that concept, but can you explain something? If we had a filter that cuts off hard at 22.05 kHz when listening to a 44.1 file, what happens when we then play a 24/96 file, will the filter automatically switch to a 48kHz LPF or do we have to chose another appropriate filter?

It should switch yes, but an argument could be made for a smoother roll of at a lower cutoff, in my view.

 

[TheTalbotHound]

But for those of use using this (or any) DAC with music at 48 or 96 kHz etc, are there filters that are more appropriate? I make music and work at higher sample rates.

Usually filter cutoffs change according to sample rate i think. Should be half of the sample rate, so 44.1 goes to 22.05 and 96 goes to 48. In practice though most devices have non filter related limitations to producing sounds above like 40khz or so, since they are made for humans, whose hearing range will probably never go above like 24khz at the absolute highest.

 

[MeMe]

I really like the fact that is balanced.
Planning to buy some new components.
I was thinking of the following combo:
D30Pro >> XLR >> Doge 8 Clarity >> XLR >> JungSon JA-99C
Looking for neutrality, detail, and a great soundstage.

Does anybody see a problem with this stack?

Thanks!

 

[Music1969]

Hi @JohnYang1997

Any plans to add A30 Pro amp performance to this DAC performance and put inside one box and eliminate analogue volume pot ?

 

[Yorkshire Mouth]

Isn’t having a volume control on a DAC like having a volume control on a turntable or CD player?

I don’t get it.