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Does anyone know if I were to send my broken amp back to Topping in China, would it get tariffed on the way back into the US?

It’s an excellent amp… if it doesn’t grenade itself.

Did you mean “every” or “any”? Not being picky but just trying to understand your meaning. What makes it better? Does the H400 have separate volume memory for each input/output?

I’m left with deciding to ship my buster a70 back to china for over $100. Has anyone had any experience with this?

$70 is not exactly low. If it were $10, then I'd agree with your line of reasoning. However what is low is all relative to your budget, as always.

DC Abnormal?

You should enjoy a darker black background, for sure, not to mention increased color separation and imagestage.

It does make me think twice about buying any more Topping devices. I think this is a great unit in terms of design and sound but reliability trumps all of this. Things that grenade themselves for no apparent reason make you feel like the sword of Damocles is hanging over your head. The “when not...

Yes, did all that. As soon as the unit boots, it shows my spectral analyzer screen for about 1s and then drops to the error message. No further interaction with the unit is possible. It does go into firmware update mode without issue. I updated after the error happened successfully but it didn’t...

Well, it’s all for naught because my A70 popped the old HP DC Abnormal error and is officially toast. Now I’m trying to see about a warranty claim. Hopefully they really do have a 2 year warranty. The amp has been operating since November 2023 until this week.

That is kind of what I’m digging for too. Seems like it should be a no brainer (I bought one so I definitely agreed with that sentiment) but you will always hear people saying xyz is just better. Hard to pin it down. Could be placebo, cost justification, nice distortion, or something magical. I...

So with the A70's clever volume control, if Low gain is enough, I should stay there? I won't be missing any dynamics or anything assuming volume levels are the same?

Another question. I forget the exact numbers but let’s say that the A70 low gain is 6 and high is 19. Should the volume and sound quality be the same if the amp is at -10 on low gain and -29 on high?

I have the DAC not the Pro. I usually run it at -13 but turned it up close to 0 and it was showing OVR on some tracks so I backed it off.

I appreciate all the info. It’s reassuring to get some science and engineering to balance against the audiophile woo. I received the HE6 today and my signal chain is Windows > (usb) RME DAC (oratory EQ applied)> (balanced) A70pro > (xlr) HE6. With the DAC at -6 and the amp at -10 (low gain)...

Curious about things like damping factor and slew rate. Are these known for the A70? It looks like the A70 maintains voltage at 50 Ω which is good! What about current?

I am getting the HE6 tomorrow and was told by someone that the A70 cannot deliver the goods and need something like a Burson or Parasound to bring out the best from them. I’m not about to drop thousands on amps to find out. If the A70 can deliver 8W into 50 Ω (I assume) is there other amp factor...

Does this amp somehow run out of juice when driving an HE-6? Like is there a way to measure the current and voltage to see if the power supply can’t keep up or dips somehow?

SMSL needs to catch up to Topping with PEQ and a spectrum analyzer display. Otherwise it’s another day another DAC from them.

I bought the E-500 in 2007 or so. It was $500 at the time, though I found it cheaper online. I was splurging because they were hailed as the best things going short of custom. After a few years one earpiece got very quiet. A common issue apparently. They wanted $250 to get a replacement set. I...