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Moondrop Dawn Pro at 300 ohm?

spankjam

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Aug 21, 2021
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Hello there,

Any idea how much mW the Moondrop Dawn Pro puts out at 300 ohm? Does anyone have the numbers?
 
Since the thing puts out 2 Vrms unbalanced or 4 Vrms balanced, this should be about 13 mW or 53 mW per channel, respectively. It looks to be voltage-limited for anything above ca. 128 ohms (unbalanced) or 256 ohms (balanced).

If this is for one of the usual Sennheisers, either should be fine, but if you need things particularly loud e.g. due to hearing loss you may want to splurge on a balanced Pentaconn cable for them.
 
Since the thing puts out 2 Vrms unbalanced or 4 Vrms balanced, this should be about 13 mW or 53 mW per channel, respectively. It looks to be voltage-limited for anything above ca. 128 ohms (unbalanced) or 256 ohms (balanced).

If this is for one of the usual Sennheisers, either should be fine, but if you need things particularly loud e.g. due to hearing loss you may want to splurge on a balanced Pentaconn cable for them.
Can this be deducted simply from the 2 Vrms spec or is this a guess?

Can you deduct from the 2 Vrms that it'll perform a certain way at 300 ohm or will there be variance?

Otherwise, there's no point I guess to get something like the Questyle M15i which apparently puts out also puts out 11.97 mW according to the specs and costs 250:

RL=300Ω,Po=11.97mW,
Vout(Max)=1.895Vrms,
THD+N=0.0003%
 
Can this be deducted simply from the 2 Vrms spec or is this a guess?

Can you deduct from the 2 Vrms that it'll perform a certain way at 300 ohm or will there be variance?
I used
DAC measurements:

Manufacturer specs:
notably:
64d9d2f1babe068ee14513b4_DAWNPRO_08.jpg

(Hmm, why would they only measure the balanced output to 2 Vrms?)

In any case, you can see that the thing is utterly unimpressed by 300 ohm cans, and seemingly entirely voltage-limited.

If you still need more data, I would look at some other competent dual CS43131 dongle DAC implementations.

Otherwise, there's no point I guess to get something like the Questyle M15i which apparently puts out also puts out 11.97 mW according to the specs and costs 250:
That's a more traditional DAC-amp that really still contains a separate DAC portion and amp even with variable gain, plus MFI certification. I'd still consider it quite expensive for what it does and can't see a good reason to spend that much on a dongle DAC.
 
I used
DAC measurements:

Manufacturer specs:
notably:
64d9d2f1babe068ee14513b4_DAWNPRO_08.jpg

(Hmm, why would they only measure the balanced output to 2 Vrms?)

In any case, you can see that the thing is utterly unimpressed by 300 ohm cans, and seemingly entirely voltage-limited.

If you still need more data, I would look at some other competent dual CS43131 dongle DAC implementations.


That's a more traditional DAC-amp that really still contains a separate DAC portion and amp even with variable gain, plus MFI certification. I'd still consider it quite expensive for what it does and can't see a good reason to spend that much on a dongle DAC.
What do you think about the Fiio KA15?

 
It's a really neat, interesting device for sure, but still brand new on the market so heaven knows how they'll hold up. If I had a good use case for such a device I wouldn't mind owning one, even if I might need a magnifying glass for the display going by the trouble I have reading my old Clip+ these days...
 
Order one from aliexpress and coming probably next week, will share my thoughts.
 
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