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technically speaking, with same hardware, it is possible to dump firmware form new device and flash it to the old device, even if the manufacturer does not release the new firmware.

I asked the manufacturer to remeasure and repost the graph. it should be fixed now.

new firmware is needed for filter selection. I proposed the feature to them months ago because they should be able to do it at zero cost. you can ask them for the new firmware. new units will come with it by default.

factories like smsl's produce at least hundreds of units per batch. otherwise the cost per unit will be too high. for a $100 unit, there no way smsl can do it with just tens of units in this batch. this is not insider knowledge at all. Not knowing that indicates you are too unfamiliar with how...

this is just nonsense. m300 is sold out and hundreds of people own it already. he is the only one that mentioned the bugs (noneven frequency response, microclicks) with zero data (or sample recording) shown. If SMSL made those serious mistakes many people may already verified it. I wouldn't...

I made it clear --- there's zero data to support his argument. I trust SMSL to get the most basic thing right (ruler flat frequency response). frequency response & the above mentioned bug can be simply tested and verified. Until I see data I won't trust either your or the other user's theory...

I don't trust MBO's argument. things such as "Аs well as SMSL built into the firmware a stereo expander or some kind of beautiful equalizer." simply does not make sense.

then it doesn't make sense anymore based on the context. the article indicated that a firmware fix could make the click go away. i won't worry about it until someone doing experiements and can show it really has issues.

not really making sense. the class H amplifier is not something that can be turned off. so no way to turn it off. based on the context the author is referring to something else. In any case it is super easy to verify if M300 has this issue. maybe just plugging the rca/hp output to computer...

cs chips are for embedded devices so having power saving mode is not new. it would be strange for product like m300 to use this feature.

if the link is what you are talking about, based on google translation (I cannot read Russian), the issue only happens in "power saving mode". As long as M300 Is not in that mode, you won't hear the microclicks. M300 is a desktop product and there's no point putting it into low power mode (see...

you're all wrong. yellow is the output buffer. red is the headphone amp. green is the muting IC.

I don't see any issue using CS43131 in M300SE. there's no downside using portable audio chip in desktop products --- ES9038Q2M for instance, are used in various desktop devices. In the M300SE case, thanks to CS43131 (that enables simpler design), M300SE becomes the best performing low cost...

There's an xmos driver setting to disable this behavior. This unit uses CS chip, which is designed specifically for headphones. It can detect headphones resistance automatically and switch to the right mode for your headphone --- no other HP amp has this feature. If you have a normal headphone...

the hp out is just the same as topping a90 so 0 Ohm.

so what's your point? DAC cannot reach hp amp's SNR. you connect a DAC to the amp, and your output's SNR is determined by the DAC, not the amp, if no voltage division is involved. unless a combo provides negative gain, it cannot compete with analog hp amp's SNR. combo can easily reach pure hp...

topping a30 pro is not even balanced. it just has a balanced jack but has no reversed phase. and compare a pure amp to dac combo is not fair at all. this device's noise is caused by the dac while amp's noise is negligible. your comparison makes zero sense to me. though your result is true ---...

You are totally talking about a different kind of mechanism, though.... in this case, noise is inverted in the negative phase. so at any time, the noise amplitude is doubled by two.

as is explained above this device reaches 90db SNR for 50mv in single ended. just don't use the balanced output for IEMs. you won't need that much power for IEMs anyway.

amir's result is misleading (again). all the tests are performed on the balanced output only, which is a true balanced design (with +/- phase instead of +/GND), so the noise is doubled compared to single ended. If you use the single ended output, you'll have 6db less noise (by half), which will...