It's usually caused by bad soldering jobs. Basically if there is a latent connection between balanced negative and single ended ground (such as drop of solder touching what it shouldn't or something touching the case etc), then plugging in both headphones at the same time will complete both circuits and cause a short. No way to know other than to make sure you disable one circuit.
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Topping DX5 II
- Thread starter Matias
- Start date
This is worrying!
My unit is 251257 4050 bought via Amazon UK but sold and delivered by Topping audio.
Having already found that plugging 2 sets of balanced HP in that they are both powered is not ideal so I have been only connecting one at a time BUT also leaving a set plugged into the 6.3mm socket - as from now I will only ever leave one set connected!
That would be OK BUT considering the flaky 4.4mm jack socket I am not really happy about regular plug/unplug use. I also noted the other day that the digital in coax socket seems undersized - tried several good quality cables and they all did not grip properly on the outer connection whereas all were reasonably tight on several other items of equipment? The pin fit seemed just about OK, mainly the screen/negative was a very poor fit.
Given my experience of a deafening ear splitting blast of audio for several seconds, in the left HP, when changing the PEQ profile after setting a small balance + to the right I am just about ready to return this unit!
It's a petty because the control buttons and menu layout with the display are pretty good and the PEQ with selectable frequencies is excellent but it seems there are more problems arising each week even with the regular firmware updates.
I will have to investigate Amazons returns procedure for international 3rd party purchases.
My unit is 251257 4050 bought via Amazon UK but sold and delivered by Topping audio.
Having already found that plugging 2 sets of balanced HP in that they are both powered is not ideal so I have been only connecting one at a time BUT also leaving a set plugged into the 6.3mm socket - as from now I will only ever leave one set connected!
That would be OK BUT considering the flaky 4.4mm jack socket I am not really happy about regular plug/unplug use. I also noted the other day that the digital in coax socket seems undersized - tried several good quality cables and they all did not grip properly on the outer connection whereas all were reasonably tight on several other items of equipment? The pin fit seemed just about OK, mainly the screen/negative was a very poor fit.
Given my experience of a deafening ear splitting blast of audio for several seconds, in the left HP, when changing the PEQ profile after setting a small balance + to the right I am just about ready to return this unit!
It's a petty because the control buttons and menu layout with the display are pretty good and the PEQ with selectable frequencies is excellent but it seems there are more problems arising each week even with the regular firmware updates.
I will have to investigate Amazons returns procedure for international 3rd party purchases.
By flaky 4.4 you mean?
I also don’t trust the 4.4 because it slightly moves when plugging in and out. So will break eventually sooner or later?!
Not to create a new topic - what would be a good desktop DAC/Amp choice in 200-300 USD/EUR price range? I just received my HEDDphone D1 and Crinear Protocol Max is on the very limit powering these headphones. Peq is a must, but I guess most of desktop devices have it. What about Topping DX5 II?
Jiraya369
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there's nothing better for normal headphones than the topping dx5 ii in terms of amp/dac capabilities. Even if you have more power from the A900, but it'll all go to waste.
I just checked the sensitivity.... it's 100 db/mw at 32 ohms. Balanced cable in eco mode powers it to 115 db. And with boost mode it can go upto 127 db.
Either you're capping or something is up here.
solderdude
Grand Contributor
Yep with 115dB/V sensitivity is pretty high for an over-ear you will only need 1V output voltage to reach 115dB peak.
120dB peak SPL means very, very loud and merely requires 1.8V (100mW).
The Crinear Max. can supply 125mW in 32ohm so will drive the D1 to irresponsible loud levels.
In balanced mode 300mW so 125dB peak SPL.
Power is not the problem here (so does not require another amp) but gain might be the issue,
When using negative pre-amp (for EQ boost) then amplifier gain may be an issue in limiting how loud it can go.
120dB peak SPL means very, very loud and merely requires 1.8V (100mW).
The Crinear Max. can supply 125mW in 32ohm so will drive the D1 to irresponsible loud levels.
In balanced mode 300mW so 125dB peak SPL.
Power is not the problem here (so does not require another amp) but gain might be the issue,
When using negative pre-amp (for EQ boost) then amplifier gain may be an issue in limiting how loud it can go.
Jiraya369
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but with -20 db preamp, wouldnt it still power it to 115 db spl in balanced mode?
I bought one 7 months ago and quickly returned it due to various bugs. I am thinking about buying one again. I haven't read the 130+ pages of discussion. Could someone please lemme know if the current firmware is stable? Any notable flaws?
ICIETDIYEUR
Addicted to Fun and Learning
No and yes.
Apart from this odd headphone killing gamble it seems fine
EDIT: by the way is somebody trying to reach out to topping to identify the possibly faulty batches?
EDIT: by the way is somebody trying to reach out to topping to identify the possibly faulty batches?
Bauhaus
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Mine is 2602573762, was purchased from Shenzhenaudio’s website and shipped to my country in the EU. I’m a bit concerned now because I’ve connected both of my headphones simultaneously (BAL Sundara and SE Meze Alba). I’m considering buying the new Luksin X8 as my ultimate goal and using it for years to come. (not the same price though)
I don't want my gears to die on me,
I don't want my gears to die on me,
That luxsin 8 looks really fine. I'm hoping for a new rme product end of january.
Bauhaus
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They appear to have really great quality. If I recall correctly, they belong to another brand from Eversolo, right? I believe they have a good reputation.
It’s not clear whether this is a soldering issue, a design issue, or both. Maybe disabling “HPA ALL” in the settings gives us an extra safety margin to avoid running into the problem. Just to be safe, I will never leave more than one pair of headphones plugged in at the same time anymore.
If you’re worried about damaging the 4.4mm jack by constantly plugging and unplugging, get the FiiO XLR to 4.4mm Bullet adapter(FiiO LX-4.4M). Worst case, you’ll wear out the adapter instead, while we wait for an official response from Topping. I already contacted them, please do the same.
Well the x9 measured well 'Luxsin X9 Smart Stereo DAC & Preamp'
Luxsin X9 Smart Stereo DAC & Preamp
This is a review and detailed measurements of the Luxsin X9 stereo "smart" balanced DAC, preamplifier and headphone amp. It was sent to me by the company and costs US $1099. Luxsin is a new brand for the Zidoo/Eversolo company and focused on higher-end audio products. In this instance, we have...
www.audiosciencereview.com
Might be a sign.. or not. EDIT: maybe not that good in the headphone output?
Last edited:
solderdude
Grand Contributor
105dB peaks = around 90dB average.
For EQ most negative pre-amp is somewhere between -6 and -10dB though.
For EQ most negative pre-amp is somewhere between -6 and -10dB though.
Quite possibly if it is flexing on the solder tabs
That sounds like a plan! I got a whole lot of adapters with my Fiio FT5 cans come to think of it, probably not one of those but I will check, thanks for the tip.
I have had a look at that as well and it does seem a nice unit although quite a bit more expensive. I downloaded the the user manual from the Luxsin site to enlighten my darkness but it was not much use - the illustrations were for the X8 but the rest of it kept quoting the X9, even warning the PEQ does not work on the digital outputs - the X8 does not have any!
Also, where the DX5 ii excels I think is the very comprehensive PEQ where it has many types of filter available and importantly, selectable/configurable frequency for each one (only using PC) - unlike my Eversolo DMP-A6 (parent/sister company to Luxsin), which is easily programmed using the associated app on my 12" Android tablet but a PIA using the smaller built in screen, and only has set frequency points, so you are out of luck if you need a specific notch filter for example.
So I am going to wait for more accurate details/reviews for the X8 before deciding on a purchase even if I return my DX5 ii in the meantime and continue using my trusty Topping L70/E70.
Is it just me or is there an ever increasing trend for Chinese Tech manufacturers to add more and more unproven/untested features to their products to tempt the market and hope the customer (beta tester) feedback will allow them to fix most anomalies with a firmware update?
Jiraya369
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ah yes! 105 db peaks with let's say 90 db average
i was just giving a VERY bad scenario, -20 db pregain. Like even with something that bad it's still deafening loudness (for me)
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