[bust3r]

Not free, but rather a free trial version which I'd be able to send back.
Anyway, I bought my Burson V6 vivid's secondhand so the burn in had been done by the previous owner.
They were installed into the Dx7 pro and didn't make a difference in them.

That's interesting. The vivids made a huge difference in detail and clarity on my HD650's. On the LCDX'S, those are already pretty forward and detailed cans already so the difference wasn't as big with them, but it was definitely noticable.

 

[bust3r]

Here is the official answer from TOPPING on headphones (taken from a different forum) :

Thank you for contacting TOPPING support. We are happy to assist.

Actually DX7Pro is able to drive 600ohm headphones, the specifications we write are conservative. The headphone is not driven by LME49720, but by the more powerful AD8397.

Best Regards,
--------------------

TOPPING SERVICE

Well I assume, unless I'm reading this completely wrong, that somewhere in the last 2 yrs topping has made all OPAMPs the same in the DX7 Pro?

OPAMP Line out is LME49720
OPAMP Headphone is AD8397

From the response above, there should be 2 different sets of OPAMPs in the DX7 Pro, am I reading this right? Because I have 4 LME49720,
The 2 on the foam have been replaced by bursons.

 

[xtiva]

Well I assume, unless I'm reading this completely wrong, that somewhere in the last 2 yrs topping has made all OPAMPs the same in the DX7 Pro?

OPAMP Line out is LME49720
OPAMP Headphone is AD8397

From the response above, there should be 2 different sets of OPAMPs in the DX7 Pro, am I reading this right? Because I have 4 LME49720,
The 2 on the foam have been replaced by bursons.

Yap can confirm that from mine
Below is line out

And headphone out

 

[bust3r]

Yap can confirm that from mine
Below is line out


And headphone out

Ok, they must have done a revision then. I'm curious and will email topping and see when the change occured.

 

[Lord Rexter]

I had received Burson Audio Vivid v6 Opamps as a free trial thank you @John Burson for getting these shipped out to me

I popped them into my Topping DX7 pro swapped out the Opamps on the Headphone out section, these are quite initial impressions and subjective in nature - was clearly a good amount of detail and tighter bass on my HiFiMAN HE-6 SE v1. Unfortunately for me the units display had gone bad need to get that fixed up before performing some extensive tests. Will post my test findings here.

Display issue (reseating the ribbon cable didn't help) DAC works flawlessly though

Vivid Opamps installed directly on the DAC

Using the extenders

 

[PKAWA]

Well I assume, unless I'm reading this completely wrong, that somewhere in the last 2 yrs topping has made all OPAMPs the same in the DX7 Pro?

OPAMP Line out is LME49720
OPAMP Headphone is AD8397

From the response above, there should be 2 different sets of OPAMPs in the DX7 Pro, am I reading this right? Because I have 4 LME49720,
The 2 on the foam have been replaced by bursons.

No, I have the LME49720 as well.
There has been no revision.
The AD8397 are under the blue heatsinks.

 

[TJ Max]

Looks like everything has been answered except bluetooth.

It's receiver only and not a transmitter.

Thank you.
I was hoping it was an LDAC transmitter but not a big deal since I have a FIIO BTA30. I think I'll go for it.

 

[bust3r]

No, I have the LME49720 as well.
There has been no revision.
The AD8397 are under the blue heatsinks.

Ohhhh ok. I was under the impression that a pair of these would be the AD8097's. Thanks a bunch!

 

[DaOchin]

oh yeah that is why decided to go with Sparkos instead Burson.. didn't really like the idea of having adapter cable.. hopefully it arrives soon.

Will report back on its effectiveness on sound

DX7 as is, lacks a little clarity and soundstage....

Did you have to purchase the risers? The sparko hits the front heat sink so I think I will need a couple for each op-amp at least.

 

[Lord Rexter]

Did you have to purchase the risers? The sparko hits the front heat sink so I think I will need a couple for each op-amp at least.

Can be purchased from Burson Audio website -> https://www.bursonaudio.com/product/35mm-extension-lead-x-2/

 

[xtiva]

Did you have to purchase the risers? The sparko hits the front heat sink so I think I will need a couple for each op-amp at least.

Oh never got Sparko yet.. ordered it with our local supplier but it never eventuated... I got the Burson instead vivid...

Does it touch heatsink for both headphone and line out?

May be this?

https://www.bursonaudio.com/product/extra-dip8-socket-x-4/

 

[DaOchin]

It only touches the headphone heat sink, the line out heatsink has space.
Sparko sells their own dip riser as well so I guess I'll order that and update how many I needed to clear.
https://sparkoslabs.com/product/dip-socket-riser/

 

[Vanheim]

I'm ordering a pair of burson v5i-d's, will report impressions soon!
currently using the burr brown opa 2134's. They smoothen up and open up the sound, focus shifts to the mids. There is a slight grain to the treble but overall the uppermids feel a bit too laidback for my tastes, hopefully the v5i-d will work for me! fingers crossed!

 

[DaOchin]

Only needed 4 total.
Initial impressions using the LCD-XC, more detail, increased space between instruments, volume increase, wider sound stage (nothing crazy as I'm on closed backs).
I was hoping to have the Focal's I ordered by now to test out as well but no such luck. I am pleased so far though, curious how the sparkos compare to the other options.

 

[xtiva]

It has been some time now with the Opamp, more than 2 weeks in fact, Opamp has not been disappointed me since, actually it got better with burn in.

Before Opamp arrived I was at stage where I was going to sell the DX7, as it has been a little disappointment for me, very shallow and narrow soundstage, lack of detail. But all this has changed with little Opamp, I was very skeptical but this little Opamp can make this amp sound a class above.

As with all the headfiers, I wanted a upgrade to DX7 pro and was going to purchase D90SE, with 15% sale from Shenzhen audio, made D90SE looked so tempting. Luckily my friend just bought D90SE about a month ago, so brought it home to do a A to B test with my DX7 with Burson V6 Vivid Opamp.

As you can see from the photo, both DX7 and D90SE are identical in size, connection at the back are also same. Both devices build quality was top notch. However I liked the DX7's dial control rather than the up/down button of D90SE.

To test, this was my setup;

Roon --> Sonnet Hermes Steamer --> AES to Topping DAC --> XLR --> SPL Phonitor X --> Sennheiser HD800 & HD800S

I only listen to Classical Music and below is my usual music when I am testing devices;

Vivaldi Basssoon Concerto in E Minor RV 484 played by Mathias Racz
Bach Trio Sonata No6 in G major, BWV 530 played by Yo-Yo Ma
Vivaldi Virtuoso - sang by Philippe Jaroussky

Difference in sound is not day and night but was substantial enough to tell which is which.

Basically DX7 Pro, just had great bass extension with great soundstage both depth and width, also had great instrument layering. D90SE was great as well, but just wasn't as good as DX7 with Burson V6 Vivid Opamp. D90SE has that infamous Sabre glare at treble, and when listening to Cantata, was a little fatiguing. Not sure how but Opamp has reduced this treble glare. D90SE also had great instrument separation and layering but it had narrower soundstage compared to DX7.

Bass extension were very similar but DX7 with Opamp had tiny bit better bass extension. Both has great tight controlled bass. Both are neutral DAC which meant no emphasis on either of mid, treble or bass just great DAC.

However today, believe DX7 with Burson V6 Vivid in DAC out audio path wins marginally.

Now need to look for 2 more of this Burson V6 Vivid to put into the headphone out path.