DT770 Pro/80  has an excellent bass response and i mean really huge bass! although it is fully controlled and will not leak into mids.
fairly comfortable and easy to drive.
the recessed mid-levels is the only issue for me but it's acceptable. therefore it's not recommended for monitoring vocal details.
soundstage is surprisingly good for a closed pair of headphones.
i wish they had detachable cables but not a major issue for me.
 

Inside the box:

Accessories:

 
First of all, beautiful dap! nice design, one of the most good looking daps around.

    
 
Silicon Case looks good:

 
UI is not the best part but its fair enough, and easy to use. only some touchscreen issues which has been solved after a FW update(2.3.0) 
 
Battery life is average. 6 to 8 hours max. but easily replaceable!

about SQ:
YES! SOUNDSTAGE! they were right. soundstage of this dap is amazing! separation and imaging is just unbelievable. this is the best part of this dap overall IMO.

Bass is Punchy and accurate. Powerful and detailed.

Mid is Flat and shinny.

Treble: crispy and clean! detailed.

overall sounds warm and neutral like vinyls. soundstage is just fantastic. a steal at this price tag!!.

 
Hi all,

i used to record my electric guitar riffs with this device. now i regularly use it as a desktop amp.
build quality is excellent, you can't crack or break it easily if u try!

i love to listen to music the best it can be heard with my budget.
i listen on either  Beyerdynamic dt770 pro 80 ohm or se215 IEMs. despite the great recording job, i can enjoy it's flat, neutral and powerful sound on playing music.
it can drive my DT 770 pro 80ohms nearly to 100dB, so if you are about to listen to loud music, i do not recommend this for higher impedance headphones.

not the most good looking soundcard in the market, but it's ok!

so far so good with foobar2000 and ASIO drivers or WASAPI output support components.

SPECIFICATIONS:
 
Microphone Preamp
Type    XLR Female Balanced
Frequency Response (±3.0 dB)    14 Hz to 70 kHz
Input Impedance (Balanced)    1200Ω
THD+N (unwtd, 1 kHz @ +4 dBu Output, Unity Gain)    < 0.008%
S/N Ratio (Unity Gain, Ref. = +4 dBu, 20 Hz to 22 kHz)    > 95 dB
Common Mode Rejection Ratio (1 kHz, 55 dB Gain)    > 45 dB
Gain Control Range (± 1 dB)    0 dB to 35 dB
Max Input Level (Unity Gain, 1 kHz @ 0.5% THD+N)    -3 dBu
Phantom Power (±2 VDC)    +48 VDC

Instrument Input
Type    ¼"
TS Female Unbalanced Input Impedance    0.5 MΩ

Line Outputs
Type    ¼"
Balanced Output Impedance    51Ω

Headphone Output
Type    ¼" TRS Active Stereo
Maximum Output    60 mW/Ch @ 60Ω Load
Frequency Response (±1.0 dB)    20 Hz - 30 kHz

MIDI I/O
Type    Dual 5-pin Female DIN

Digital Audio
ADC Dynamic Range (A-wtd, 48 kHz Sample Rate)    105 dB
DAC Dynamic Range (A-wtd, 48 kHz Sample Rate)    105 dB
Bit Depth    24
Reference Level for 0 dBFS    +4 dBu
Internal Sample Frequency Selections (kHz)    44.1, 48
Power    USB Bus-powered

Physical
Dimensions    1/3U (steel chassis)
Height    5.5” (139.7 mm)
Depth    1.75" (44.45 mm)
Width    5.5” (139.7 mm)
Weight    5 lbs (2.27 kg)