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Review and Measurements of Topping DX3Pro DAC and Headphone Amp

yue

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Jul 21, 2018
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I took a look at the circuit board on their website.
The most powered component should be the OPA1612, OPA1640 and 2sd669ac (transistor in the diagram).
They together form the amplification stage of this device.
I read their respective datasheet.
OPA1612 and OPA1640 could operate at 125C (257F) safely.
2sd669ac can even operate at 150C (302F) safely.
Other ICs (such as the AKM chip or the XMOS chip) can operate at 85C.

I would say these are pretty wide temperature range. I would be surprised if it can even get that hot at the max power.
 
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Yeah, because no one uses it.
I'm not sure if you realize it but you are comparing unit that was incredibly hyped and bought by lots of people with something that probably no one here has. There is actually little failures of dx3 so far compared to overall volume.
If you want reliable product, buy something by jds labs for instance.
I agree on this and ive been affected by a faulty unit
 
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It might be placebo or just dumb, but ive been not using the dx3 for a day because i have planned to return it and got it packed (controller not worrking), since Paypal is taking time to give me the instructions to send it back i decided to unpack it and use it meanwhile. I used my own power supply [email protected] because I didnt want to unroll the stock one and well, the bass i feel like improved a fucking lot. Maybe its placebo of my ears not using it for a day, or maybe im right and it actually improves quite a bit. Sennheiser HD580 here, from lacking some bass and lots of sub-bass to having fine bass and some sub-bass

I know the lacking are on the headphone side, but still i wanted to talk about the improvement i felt the power supply did.
 

Toku

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Either way, I am not getting the dx3 pro, mx3 seems more reliable and stable
It is useless argument!
That is MX 3 is simply the type of your choice.
It is not a target product to be discussed in the same table as DX 3 Pro.
MX3 also has some problems.

DX3 Pro is never a perfect product, but it is a wonderful product.
I feedback the problem found to Topping and feel the pleasure as a user to make it a more wonderful product.
 
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Apologies in advance if I rub anyone the wrong way, but I can't hold my tongue...

I really love the DIY and hobbyist streak displayed around here and can personally relate to it. OTOH, I'm struck by the irony of us discussing thermal imaging, DIY heatsinks and custom fan installation to fix problems with the "highly recommended" DX3 when we continue to rag on Schiit for their build quality. To be clear, I personally had my first Magni 3 die on me within 15 minutes of first plugging it in, so I'm not claiming that Schiit makes great quality stuff.

I think it's important to call a spade a spade, and the anecdotal reports I'm reading on here make me want to stay away from the DX3, in particular because sending it to China for warranty service is such a hassle. Yeah it has a ton of features, but I suspect a lot of people don't really need those and might be better off with a simpler DAC (even one from Topping) paired with a JDS Labs Atom and just be done with it.
It's also important to consider that there are a lot of users who are satisfied with this product that do not feel the need to be vocal about it, as opposed to others who have experience issues.

(With that said, I've probably cursed myself, and will be back to complain in a few weeks.)
 
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I did again the firmware upgrade and scanned the Bluetooth devices without any chance . I'll contact Audiophonics
Got my unit today and was having the same issue. I could not pair it with any BT device I have. Tried the factory reset, no change. Then I reinstalled the latest firmware and now it works.
 
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Love my DX3 Pro but the very brief instructions don't address the settings for a volume controlled DAC output into a conventional amp. Can this be done and if so how?
 
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Love my DX3 Pro but the very brief instructions don't address the settings for a volume controlled DAC output into a conventional amp. Can this be done and if so how?
Press "Line Out" button on remote or click rapidly twice unity's button until it shows "DAC" and volume on display. Be carefull, if you press twice one more time or press "Line Out" on remote twice it'll change to fixed 0db output.

When the display shows "DAC" and volume, it's on "pre-amp" mode with volume control. It's the first DAC mode. When shows frequency, it's on fixed 0db mode, which is second.

If you don't want to deal with these DAC modes, you can choose the blinking headphone mode which outputs both 3.5mm and RCA with volume control. With the remote, just press the center button in the middle of round volume and arrows button.
 
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Got my unit today and was having the same issue. I could not pair it with any BT device I have. Tried the factory reset, no change. Then I reinstalled the latest firmware and now it works.
Lucky you! I'm waiting for Audiophonics to know if they accept to send me a new unit (but tested by them before sending) or accept their offer of partial refund.
 
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It's also important to consider that there are a lot of users who are satisfied with this product that do not feel the need to be vocal about it, as opposed to others who have experience issues.

(With that said, I've probably cursed myself, and will be back to complain in a few weeks.)
Agreed, it is virtually always the case that dissatisfaction results in more airtime than satisfaction; having said that if there is considerable vocalization of dissatisfaction with a new product there likely are some issues to be resolved (hopefully in FW/drivers, in a V2 of the product if not amenable to SW fix).

As to me, so far having a lot of fun with my DX3Pro listening from Tidal. It shares ear time (USB and Bluetooth) with my DX7S/MD-THX 789 and D50/Atom stacks (both through USB) and subjectively holds its own rather well. So far no reliability issues. Clicks only when changing sample rates, and since I am listening to my headphones when this happens the only one that might be bothered is the dog.

Chalk me up as one of the “silent majority”.
 

vladsonl7

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As to me, so far having a lot of fun with my DX3Pro listening from Tidal. It shares ear time (USB and Bluetooth) with my DX7S/MD-THX 789 and D50/Atom stacks (both through USB) and subjectively holds its own rather well. So far no reliability issues.
Hi! i just bought mine on Shenzhenaudio Ebay page. Bought for headphones HE400i and this is my first amplifier. How do you think I will be satisfied with this combination? Thx
 
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Hello. Meanwell GS18E15-P1J is this power supply will be better option than stock ps? But will it be compatible with dx3 pro? Or Or is it worth buying this power supply? Will there be a big difference between them? breeze ps
 

amirm

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Hello. Meanwell GS18E15-P1J is this power supply will be better option than stock ps? But will it be compatible with dx3 pro? Or Or is it worth buying this power supply? Will there be a big difference between them? breeze ps
No difference. Don't waste your money on extras.
 

amirm

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Hi! i just bought mine on Shenzhenaudio Ebay page. Bought for headphones HE400i and this is my first amplifier. How do you think I will be satisfied with this combination? Thx
I have tested that combo and it sounds fantastic.
 
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Agreed, it is virtually always the case that dissatisfaction results in more airtime than satisfaction; having said that if there is considerable vocalization of dissatisfaction with a new product there likely are some issues to be resolved (hopefully in FW/drivers, in a V2 of the product if not amenable to SW fix).

As to me, so far having a lot of fun with my DX3Pro listening from Tidal. It shares ear time (USB and Bluetooth) with my DX7S/MD-THX 789 and D50/Atom stacks (both through USB) and subjectively holds its own rather well. So far no reliability issues. Clicks only when changing sample rates, and since I am listening to my headphones when this happens the only one that might be bothered is the dog.

Chalk me up as one of the “silent majority”.
What is your subjective feeling about listening experience and differences between DX3 Pro, D50 and Dx7s? Is there a big difference between these dacs?
 
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What is your subjective feeling about listening experience and differences between DX3 Pro, D50 and Dx7s? Is there a big difference between these dacs?
Well, this is an objective, not subjective, site, so I will refrain from making any real observations, other than to say that my Sundara, Aeon Flow, and Elex all sound great with any of these. Maybe the DX3PRO is a tad “warmer”, and the DX7S/789 combo with all balanced maybe is a tad “fuller”, but since these are all sighted and not carefully volume matched observations I am more likely hearing what I think I should hear than what is really being presented.

To me, if I was to be stranded on a desert island with just one of these setups, I would be happy with any of them... Maybe a slight bias towards the DX7S/789, but only because the 789 provides balanced, SE, and SE IEM outputs, so a bit more flexibility - obviously while being stranded with one DAC/Amp combo is acceptable, no self-respecting castaway would allow himself to be alone on a desert island without a host of headphones and IEMs.
 
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Veri

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What is your subjective feeling about listening experience and differences between DX3 Pro, D50 and Dx7s? Is there a big difference between these dacs?
I think Amir basically always uses his DX3 now for listening, since it's a tiny, convenient do-it-all machine with sufficient power and great dac section. What more does a person need..
 
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It might be placebo or just dumb, but ive been not using the dx3 for a day because i have planned to return it and got it packed (controller not worrking), since Paypal is taking time to give me the instructions to send it back i decided to unpack it and use it meanwhile. I used my own power supply [email protected] because I didnt want to unroll the stock one and well, the bass i feel like improved a fucking lot. Maybe its placebo of my ears not using it for a day, or maybe im right and it actually improves quite a bit. Sennheiser HD580 here, from lacking some bass and lots of sub-bass to having fine bass and some sub-bass

I know the lacking are on the headphone side, but still i wanted to talk about the improvement i felt the power supply did.
Not on the 12v part, but Dx3 always make me feel lacking some punchy in the bass area using some easy to drive headphones like cd900st than my old Dac, but definitely more clarity after some A-B testing. Some say it's AKM chip signature sound, I haven't used many DAC so IDK.
 
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Rollingsound514

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I tested the Logitech Harmony set up for the DX3 today. It works properly and will switch inputs for you without messing it up. I've got USB for my HTPC (Tidal) hooked up and the Optical hooked up to the TV and the Harmony Hub switches between the two activities perfectly now. Seems to want to turn off my TV when switching activities but that has nothing to do with the DX3 lol.
 
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