Acoustune AS2002 Portable USB DAC - Equipped with Asahi Kasei Electronics “AK4493S” - has been released:
https://www.acoustune.jp/as2002Looks very interesting. Hope to see some reviews.
Torben
Any particular sets sound correct on this dongle?As an update, I mentioned above that I occasionally experienced a bit of EMI noise while on mobile data. I noticed that it only occurs when the device is connected to the back of my iPhone via MagSafe. Otherwise, no EMI noise.
So far, I am listening to the U4s and IE900 and enjoying both. The lack of independent volume control on the iPhone is not ideal, though.Any particular sets sound correct on this dongle?
So far, I am listening to the U4s and IE900 and enjoying both. The lack of independent volume control on the iPhone is not ideal, though.
As an update, I mentioned above that I occasionally experienced a bit of EMI noise while on mobile data. I noticed that it only occurs when the device is connected to the back of my iPhone via MagSafe. Otherwise, no EMI noise.
"device is connected to the back of my iPhone via MagSafe" - if this is the case, than it would be a bit disappointing. I would use it that way.
Torben
Thanks a lot for the update! Happy to read that its a fun, non fatiguing signature, as im planning on using it mainly with U4s and Titan, which are both engaging iems.I have been using the AS2002 connected to my iPhone 15 Pro today, mainly with my JM Audio XTC2 open back headphones (64 ohms impedance/113.5 dB sensitivity). I am only using about 25% of the available volume in normal gain mode. Sound is clear and engaging, but non-fatiguing. Pretty darn close to my desktop setup! I have not heard any EMI noise today, but I am on Wifi and the dongle is right next to the phone - not attached via MagSafe.
I am using mine with a Samsung s21 ultra, every now and then I hear a faint "digital click" kind of sound, is that what you mean by EMI noise?I have been using the AS2002 connected to my iPhone 15 Pro today, mainly with my JM Audio XTC2 open back headphones (64 ohms impedance/113.5 dB sensitivity). I am only using about 25% of the available volume in normal gain mode. Sound is clear and engaging, but non-fatiguing. Pretty darn close to my desktop setup! I have not heard any EMI noise today, but I am on Wifi and the dongle is right next to the phone - not attached via MagSafe.
I am using mine with a Samsung s21 ultra, every now and then I hear a faint "digital click" kind of sound, is that what you mean by EMI noise?
Does your as2002gets hot as well? Like, uncomfortably hot (I know it is around 30C where I'm at currently but still....)
And I've also noticed it drains my phone battery kinda fast.
It does sound great with the symphonium Titan, though!
I don't think I'm not running it at higher volumes either; less than 50% on the S21 ultra. And what I mean by uncomfortably hot is that I wouldn't want to hold it in my hand for 5 minutes or more. This is while driving the symphonium Titan after an hour or so, I haven't tried it with anything else.If I am on cellular data, occasionally I will hear a couple seconds of interference if a text is being received, etc. - mostly when connected to the MagSafe.
It definitely gets a little warm, but not uncomfortably so in my case, though I am not running it at high volumes. Battery drain is somewhat fast as well (reminds me of the Cayin RU7 in that respect), but as you noted, the sound is good.