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Review and Measurements of Topping DX3Pro DAC and Headphone Amp

Poultrygeist

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Still enjoying the excellent sound and features of the original.
 

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TunaBug

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-Surprised it's still built on xmos XU208
-Jitter is no longer anxious :p
-Specs look really nice. The stacked LM4562 output looks interesting.

Don't products built with the XU216 usually do MQA though? So we can be happy with the XU208 :)
 

TunaBug

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With the extra horsepower that's an option, yes. :)

If only they had a use for that extra horsepower, other than MQA. PEQ for example. My impression of Topping is that they are fantastic at designing analog sections, integrating that with DACs, USB interfaces, etc. But also lacking when it comes to software development. I hope that the software side of things is something they can grow into... I would love for Topping to grow into being competition for Matrix Audio.
 
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Veri

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If only they had a use for that extra horsepower, other than MQA. PEQ for example. My impression of Topping is that while they are fantastic at designing analog sections, integrating that with DACs, USB interfaces, etc. But also lacking when it comes to software development. I hope that the software side of things is something they can grow into... I would love for Topping to grow into being competition for Matrix Audio.
I think they are aiming for that. Just takes time or course :D
 

Proberts911

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You need to go to advance settings, it can't be done from remote any more in V2. Just unplug power (totally) press the knob and plug power again, you will boot the advance setup menu, I don't remember the exact option, but you can find it in manual to change from pre-amp to DAC mode.
Many thanks. This is a huge help! I didn't think of unplugging it.
 

Ere

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Thanks I got it now. Version 2, power off the unit (with cable, not just standby) hold the knob inside as you connect the power cable again. Then you can see the menu. Save by holding the knob again, until you see 8-8.
On the DX-3 Pro I just bought one can switch between headphone amp and DAC modes either by accessing the menu by powering off/holding down multi-function button/powering on OR by pressing headphone/DAC buttons on the remote.

My test set-up here is: video signal to monitor w HDMI and audio from Sony BDP-S6700 universal player via coaxial to the Topping.

I selected "DAC mode" to display the sampling rate of what was coming into the unit but noticed that even when playing single layer SACDs (like the one below) it displays as

44.1 PCM

shouldn't the unit display 2.8MHz?

(notice in photo that the output display from the Sony shows the disc as DSD 2.8 MHz)?

Thoughts on why it's doing that or suggestions how to make the Topping display the correct input info? Thanks


51843369363_230173167f_k.jpg
 
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Toku

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On the DX-3 Pro I just bought one can switch between headphone amp and DAC modes either by accessing the menu by powering off/holding down multi-function button/powering on OR by pressing headphone/DAC buttons on the remote.

My test set-up here is: video signal to monitor w HDMI and audio from Sony BDP-S6700 universal player via coaxial to the Topping.

I selected "DAC mode" to display the sampling rate of what was coming into the unit but noticed that even when playing single layer SACDs (like the one below) it displays as

44.1 PCM

shouldn't the unit display 2.8MHz?

(notice in photo that the output display from the Sony shows the disc as DSD 2.8 MHz)?

Thoughts on why it's doing that or suggestions how to make the Topping display the correct input info? Thanks


51843369363_230173167f_k.jpg
When I purchased the Sony BDP-S6700, I found that when the COAX output was connected to the DAC, it could only be played at PCM 44.1kHz/16bit, and I investigated the cause.
After all, the cause was copyright protection. It seems that the specifications of these players stipulate that all files be down-converted to CD quality 44.1kHz/16bit. If you want to use the original as it is, you need to consider connecting using HDMI.
Take the I2S signal from the HDMI output of the BDP-S6700 and connect it to a DAC with an I2S input.
The same thing is talked about in the E50 forum and it is explained in detail, so please refer to it.

 
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Ere

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... If you want to use the original as it is, you need to consider connecting using HDMI.
Take the I2S signal from the HDMI output of the BDP-S6700 and connect it to a DAC with an I2S input.

I'd like to play high-resolution discs from their original media, and feed the best quality two channel audio to a Marantz 2275.

Since some of the discs use menus to access content (e.g., Steven Wilson's work on Yes) the video signal from compatible players needs to go to a monitor.

If there's no workaround with these models of Sony or Topping, I'm open to going to something that either plays the media and outputs the higher-than-CD quality to analog, especially since there is an eight week window to return the DX3. In other words, if what I'm after won't work on these units, any suggestions of those that will within a budget of less than $750 or so would be appreciated.

thanks
 
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Toku

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Buy a new DAC? OK
I'd like to know if there is a solution with the two units I have in hand...
no,
I gave up using the BDP-S6700 as an audio player. Right now I only use it to play Blu-ray discs and DVDs.
So I switched all audio playback to USB-connected PC audio.
 

Proberts911

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I have two sources feeding my DX3 Pro+, a CD player using optical and a raspberry pi using USB. The line out preamp is turned off. The output is connected to active speakers (Audioengine A2+). When switching between CD and USB, the CD is much louder. At least twice as loud. Does anyone know why?
 

Jimbob54

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I have two sources feeding my DX3 Pro+, a CD player using optical and a raspberry pi using USB. The line out preamp is turned off. The output is connected to active speakers (Audioengine A2+). When switching between CD and USB, the CD is much louder. At least twice as loud. Does anyone know why?
The obvious answer is that some digital attenuation is happening in the Pi. What are you using the Pi for ? Streaming of some sort? Check that volume normalisation or whatever its called in your service is turned off. Also make sure the software player in the Pi is at max.
 

Proberts911

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The obvious answer is that some digital attenuation is happening in the Pi. What are you using the Pi for ? Streaming of some sort? Check that volume normalisation or whatever its called in your service is turned off. Also make sure the software player in the Pi is at max.
Thanks. That makes sense. Yea, I'm streaming from the pi running piCorePlayer. I'll look around the settings and adjust accordingly. Appreciate the help.
 

pwn87

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The problem that I have on my unit should not affect the sound quality, but I will review my post if my unit would be replaced and the new one is better.
have you gotten a replacement unit? how is the sound now?
i've never had any issues with amazon. they even refund any shipping and import fees if you send something back to another country/marketplace.
it could also be that the device is too linear and revealing for the recordings you have.
i'm curious because a friend is considering buying the dx3pro+
 
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RHO

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have you gotten a replacement unit? how is the sound now?
i've never had any issues with amazon. they even refund any shipping and import fees if you send something back to another country/marketplace.
it could also be that the device is too linear and revealing for the recordings you have.
i'm curious because a friend is considering buying the dx3pro+
The only "problem" with the headphone output from the v2 is that it has a higher impedance (~10Ohm). This could, maybe, in some cases, influence the sound on some lower impedance headphones. It could also limit the output on low impedance, low sensitivity headphones. (higher output current = bigger voltage drop over the output)
All this should not result in major issues with the qulity of sound.
Also this "problem" is solved in the DX3 pro+.

I solved the issue with the BT switching the device on by just removing the device from the list of BT devices on my phone. I just re-connect when I need the BT on the Topping.
 

Bun-Bun

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Do you think you could follow up with them and ask exactly what they mean by "due to specific usage will caused damage again"? I'm taking that to mean the OPA2140 will inevitably fail no matter what. I ask because my DX3 Pro v1 failed recently after 9 months of daily use. After opening it up I found the OPA2140 was dead. I was going to replace it with a new one but if it will just fail again then it seems pointless.

Yes, they meant the OPA2140 in that circuit is highly sensitive and will likely keep failing. Replacing with AD8620 along with increasing the output impedance corrects this weakness. Can confirm have been using my repaired DX3Pro daily for 2 years since the repair and it's been rock solid.
 

VXAce

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Well nuts, I just received a used unit and ran into this exact issue. Thanks for all the documentation on repairing this! Going to see if I can get my hands on the AD8620 and whatever else needed to repair...
 

yuktak

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1653436958064222940692140318311.jpg
i got a topoing dx3pro+ and i would like to open up.I am able to open up the rear panel and that's all. Do i need a extra long allen key 1.5mm x 200mm ( long) to open it up. Please advice
 

mejobloggs

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Been using a speaker setup for a few years but moved into an apartment with close neighbors all around so dug out my DX3 Pro.

Can't find the remote, can I change gain without remote?

Can't remember anything about the DX3 Pro, lol... do I just plug and play? Any Windows config required?

I mainly just play games with k612 Pro headphones. Some youtube music. Do I need to download drivers from Topping website? Or just go with Windows default?

Seems pretty loud. I've set it to -40 db is that normal?

252 pages... had a quick scan through. I see mentions of firmware updates but links don't work anymore. Looked on Topping website and can't see any firmware for DX3 Pro, only Pro+. Anyone know where I can find latest firmware?

Probably questions asked a million times sorry but this is a huge thread and didn't spot the info I was looking for

Cheers
 
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