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Topping L30 Headphone Amplifier Review

bt3

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Purchased L30 on Nov. 2020 with S/N beginning in 2008.
#1 concern for me is possible exposure to loud noise from failure while listening to headphones.
Nine years ago I was pumping-up a tube/tire on my Merlin bike, with my right ear very close
to the tube when it exploded. Have had a constant hum (frequency and volume of hum wavers ) in my right ear ever since.
An audiologist informed me my tinnitus is permanent. I am very careful with listening levels and being around any noises in/around my
environment. I plan to continue using the L30 (with the E30 purchased at same time), but will return my L30 for latest (corrected) version when it becomes available to my authorized seller.
 

escalibur

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After reading several pages of this topic, I will try to make a summary to help users who are concerned about the situation and will not have time to read everything...

1. Topping L30 (serial number 2011 or lower)
- Has the DC problem
- Has the ESD problem
- In this condition, in rare cases, your L30 can fail and damage your headphone as well.

2. Topping L30 (serial number 2012 or higher)
- Has an updated DC protection system
- Has the ESD problem
- In this condition, in rare cases, your L30 can fail, but your headphone will be protected.
*if your L30 fails and it is within the warranty period, Topping will replace it.

3. [In the future] Topping L30 (serial number 20XX or higher)
- Will have an updated DC protection system
- Will have an updated ESD protection system
- In this condition, your L30 will be very safe ...

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*If I made a mistake or if I forgot something, please let me know so I can update it.
-------------------------------------------------------------------------------------------------------------------------



Importante information:



Excellent questions from other users...
1)
2.
Please @JohnYang1997 , keep us updated... ;)
@SHENZHENAUDIO Please confirm, may we have the 3rd (fully fixed) version as a replacement?
 

Fluffeh

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I think, in point 3, updated DC protection is already there. John was also saying that, from Day1, DC protection by design was better than amps such as O2, and others, and Topping has further enhanced it in L30. solderdude made a point regarding this; saw it in one of your posts.

[Others can correct me, saying this from memory].
Apparently yes, the DC voltage regulation from the December 2020 batch (S/N 2012 and +) has been fixed but it only prevents the L30 killing/damaging the headphones or IEMs plugged into it if the op-amp fails catastrophically.

So the L30 from the S/N 2012 batch is still be vulnerable to ESD, and while your ears and your headphones/IEMs might survive a 2012 unit failing catastrophically, the L30 itself might still die from ESD.

What some of us (including, I think, escalibur) were asking about was the possible upcoming version of the L30 that will also include additional protection against ESD.
 
Last edited:

Fluffeh

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It states that, In the future, DC protection will be there. That part might be incorrect, but I leave it to you and F. L.N.
Thanks for summarizing.
ESD, he has covered in 3010, in case you need some pointers - that they have identified (?) the error, and so on. And that he will revert. Okay, you are asking ETA for that.
DC protection has always been there, even on "old" units.

According to John, it just wasn't working properly until they fixed it in the December 2020 (S/N 2012) batch.

See his post here : https://www.audiosciencereview.com/...e-amplifier-review.15226/page-124#post-630733

And yes, we are now asking about the upcoming units that will also have ESD protection.
 

Fregly

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I am surprised everyone is so sanguine about this, the potential for ear damage ( I have the bad serial number). My Dx3pro had problems too. That makes 2 of 3 Toppings product for me that have not worked out. I am afraid I am done with the company. Good thing I kept my Atom, which I just set up again with the E30.

Purchased L30 on Nov. 2020 with S/N beginning in 2008.
#1 concern for me is possible exposure to loud noise from failure while listening to headphones.
Nine years ago I was pumping-up a tube/tire on my Merlin bike, with my right ear very close
to the tube when it exploded. Have had a constant hum (frequency and volume of hum wavers ) in my right ear ever since.
An audiologist informed me my tinnitus is permanent. I am very careful with listening levels and being around any noises in/around my
environment. I plan to continue using the L30 (with the E30 purchased at same time), but will return my L30 for latest (corrected) version when it becomes available to my authorized seller.
 

Veri

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Feb 6, 2018
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Just scratched my current L30 chassis for a photo and will get shipped a brand new one. I can deposit the old one to recycling center. just hope the new one will have the same superb volume balance and zero knob play like my current one :D

For the price I put into the L30 amp, I got lots of use out of it and now a replacement, just to be sure. I feel like I can't really complain..
 
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I have already thrown away the box and the label on the main unit has been peeled off, so I can't confirm the serial number.
Does this string on the PCB help me to know the beginning of the serial number?
IMG_0535.jpg
 

solderdude

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solderdude

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Just scratched my current L30 chassis for a photo and will get shipped a brand new one. I can deposit the old one to recycling center. just hope the new one will have the same superb volume balance and zero knob play like my current one :D

For the price I put into the L30 amp, I got lots of use out of it and now a replacement, just to be sure. I feel like I can't really complain..
I say: don't bin the old one. Keep the PCB for spares (potmeter, switches) you may be able to prolong the life of the new one.
Perhaps the current batch can be made ESD safe as well (I assume it is just potmeter shaft grounding and switches).
 

Jose Hidalgo

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3. [In the future] Topping L30 (serial number 20XX or higher)
For the record, the future Topping batches will probably NOT be called 20XX.
If you haven't noticed, 2011 simply means "november 2020". 2012 means "december 2020". And so on.
The next batches should logically be 2101, 2102, 2103... ;)
 

checkooo

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Jan 14, 2021
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I got a 2007xxx L30, not sure what to do now, will it be replaced or I should simply return it...
With the safety concern, I think I won't use it for now...
And since I got the L30/E30 set, not sure if I still will keep the DAC...
Got the set on Amazon at a great price, so it would be great if I can get a replaced one...
 

JohnYang1997

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I got a 2007xxx L30, not sure what to do now, will it be replaced or I should simply return it...
With the safety concern, I think I won't use it for now...
And since I got the L30/E30 set, not sure if I still will keep the DAC...
Got the set on Amazon at a great price, so it would be great if I can get a replaced one...
DAC is fine. Get the L30 replaced and enjoy.
 

JohnYang1997

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John, just a question, sorry if it is uncomfortable to answer it or if you still have no answer, can I wait to exchange my L30 only when the ESD problem has been addressed or is this exchange condition only valid now?
I think the only condition is just SN before 2012.
 
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@JohnYang1997 so my situation is 2rca 3.5mm to dragonfly Cobalt used only as a dac and connected to a phone as a source and then the headset connected to L30. What could I risk with 2012sn in that situation? Thanks
 

JohnYang1997

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Thanks for the reply. So should I contact the topping support to replace it or do it directly on Amazon? Or do you have any recommendations for the replacement?
You can direct contact where you buy the unit from. They will help you out.
 
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