Wouldn't it be simpler (well, safer) to add power cord before transformator?For any future references, this is how 15V connector on 220-230V EU Topping adapter looks, hope it helps:
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All volume ranges are usable for me - I'm not going to sacrifice convenience here.Set the gain so that you have a very usable volume range.
Whether this turns out to be L, M or H (depends on several factors) is irrelevant.
There is nothing more to it and other than maximum volume differences there are no sonic consequences. All settings are equally transparent.
Differences are ONLY measurable, not audible.
Depends on the input level, the medium-gain setting is unity (0dB), so 1Vin ≈ 1Vout.Power seems to be about 13 mw.
It's the other way around.Hi, quick question :
In the E30 thread, it was said that the E30 power connector was exactly 5.5 x 2.1 mm : https://www.audiosciencereview.com/forum/index.php?threads/topping-e30-dac-review.12119/post-505883
AFAIK the L30 power connector is 5.5 x 2.5 mm.
So normally the E30 power cable shouldn't be able to fit into the L30 connector. Unfortunately it does, because like it was said, it "is universal and fits both 2.1 and 2.5". I believe that's why some people have had issues in the past, putting the wrong cable into the wrong connector.
Is this correct ? Are the E30 and L30 power connectors respectively 5.5 x 2.1 and 5.5 x 2.5 mm, or is it something different ?
You are correct.Great, I understand. But L30 power is 5.5 x 2.5 mm, right ? So the past incidents mean that the L30 2.5mm power plug would also fit the E30 2.1mm power connector.
My question is only to better understand the products specs, that's all. I have 7 of them now, so...
(but I'm only using 5 - the two others are the old L30 <2012 which I don't use anymore)
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7Great, I understand. But L30 power is 5.5 x 2.5 mm, right ? So the past incidents mean that the L30 2.5mm power plug would also fit the E30 2.1mm power connector.
My question is only to better understand the products specs, that's all. I have 7 of them now, so...
(but I'm only using 5 - the two others are the old L30 <2012 which I don't use anymore)
View attachment 136358
Since you tagged Amir, probably he would update that soon.@JohnYang1997, can you help @amirm update his out of date message at the top of the main page for this review?
I avoid linking to this review when helping others on Reddit choose an amp because it needlessly creates fear about a problem that's been solved. And quite frankly, it often initiates a discussion about what happened that I really don't want to get into.
So I pretty much stopped linking to it. I might not be the only one. And it's too bad, because the measurements are excellent and help the amp to sell itself.
May I ask if there was any modification a the input section of the L30? Something like resistor before the op amp?Since you tagged Amir, probably he would update that soon.
@amirm If you have not been following, the issue was caused by ESD with low input resistance destroying the opamp. Units with 2012 and newer Serial Number have fixed DC and ESD protection.
Thanks in advance.
ESD protection so there's another path for ESD current to go instead of the input pin of the opamp. Newly designed models will have another layer of protection, dedicated ESD clamping diodes for every input and output.May I ask if there was any modification a the input section of the L30? Something like resistor before the op amp?