Aune M2 | AK4490 Dac | Class A amp | Dual Crystek USA Clocks |
May 23, 2015 at 4:56 AM Thread Starter Post #1 of 823

T.R.A.N.C.E.

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[size=24.57px]Aune M2 32BIT DSD portable music player[/size]
M2 is the 2nd generation portable music player from Aune, co-designed by the M1, B1, S18 team.
 
2.4'' IPS display
Full Aluminium Chassis
AKM AK4490 32bit flagship DAC chip
4 Digital filter options
Class A discrete transistor headphone amp integrating elements from B1 (co-designed by B1 team).
Gain adjustable for headphones and earphones
PGA2311 Analog Volume control
Over 3.1VRMS output
SNR: -116dB
HO THD+N- 0.001% (Loaded)
HO noise: 5.86uV (and at near max volume @3.1VRMS noise barely changes @6.08uV!)
LO THD+N- 0.001%
LO noise: 2.76uV
3200mAh battery
Battery life 9 hours of continuous playback.
Dual ultra-low jitter crystal oscillators (44khz, 48khz-192khz, DSD)
Asynchronous clock and CPLD technology
Micro-SD card support 128GB
Dimensions: 65*110*17 (mm).
Supported formats-
  WAV:16bit|24bit|32BIT- 44.1K/48K/88.2K/96K/176.4K/192K WAV + CUE
  FLAC:16bit|24bit- 44.1K/48K/88.2K/96K/176.4K/192K
  APE:16BIT/44.1K APE + CUE
  DSD format:DSF/DSD64 - DFF/DSD64 ISO
  AAC, MP4A, MP3
       
 


There are 3 models of M2:
 
-Aune M2- $350- Uses Japanese Crystal Oscillators
-Aune M2 Pro-$500- Uses custom Crystek (USA) Crystal Oscillators pictured below and opamps upgraded.
-Aune M2S- $650- Has the upgrades of the Pro version and adds Teflon substrate PCB, this is the only dap to use Teflon PCB which are only found in a few very expensive desktop audio gears.
 
 

 
May 23, 2015 at 12:33 PM Post #2 of 823

beeman

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i have recently bought the m1. i usuually use a sony mz-rh1 (line-out) topping amp.  To be honest i prefer the m1 (no headphone amp). It has a neutral sound. Mids are warm - and seperation is excellent. I am aware of a very slight sibilance so need to pair with the right headphones - Paired with sony mdr 7750 iems it sounds great. To be honest i thought that i would be intereted in m2 - simply from basis of wider format support. But conversion from flac to 16 bit wav has been easy with mediamonkey ... so not sure about m2. Looking forward to hearing some reviews of the m2
 
May 24, 2015 at 5:35 AM Post #3 of 823

RAFA

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Here is some sort of diary of the development progress:
 
http://bbs.hifidiy.net/forum.php?mod=viewthread&tid=1040163&extra=&highlight=aune&page=1
 
Jun 1, 2015 at 6:27 AM Post #5 of 823

T.R.A.N.C.E.

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I'm liking the M1 I've got, and this M2 looks like it has improved in several important areas, like dac, amp, power regulation and volume control . I can definitely see the amp section has an improved discrete transistor buffer section, no doubt influenced by B1. And the AKM4990 is looking to be a great dac. The power regulation is stepped up by using beefy LDO's from TI. The volume control is improved by using the TI PGA2311 which will get rid of channel imbalances that rotary pots have. The backbone of Aune's sound is their CPLD tech for a better audio signal sent to the dac, means everything else in the chain will sound better.
 
Jun 1, 2015 at 6:57 AM Post #7 of 823

Vignelli

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No full size SD-Card. Even Aune is giving up on that
frown.gif

come on man.. move on.. :D
 
Jun 1, 2015 at 8:20 AM Post #8 of 823

T.R.A.N.C.E.

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No full size SD-Card. Even Aune is giving up on that
frown.gif

 
It is a shame yes, I love full size SD. M2 has all circuits on a single pcb unlike M1 with double pcb's, so needed to cut down unnecessary things on the M2. They moved to single pcb on the M2 so it could have a larger battery than M1.
 
Jun 1, 2015 at 1:33 PM Post #9 of 823

RAFA

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come on man.. move on.. :D


Life is hard for me, being the full size type of guy...

It is a shame yes, I love full size SD. M2 has all circuits on a single pcb unlike M1 with double pcb's, so needed to cut down unnecessary things on the M2. They moved to single pcb on the M2 so it could have a larger battery than M1.


Seeing the PCB, it might not be the fatest player... Fits nicely in the pocket.
 

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