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Gustard A20H DAC (Dual AK4497EQ, analog preamp, headphone amp, all in one)
Nov 3, 2016 at 12:15 AM Post #76 of 391
With the Sennheiser HD600s it's a match made in heaven. I suspect the 300ohm input impedance is an ideal pairing with this amp. I'm playing out of the SE output and the results are excellent. The 120ohm impedance K501s and far more so 25ohm DT48s where a good bit worse sounding than the HD600s. They're my preferred dynamic headphones. I'm sure there are better dynamic headphones available and likely much better but these get the job done for me. I prefer them to the LCD3's which I mentioned I heard recently. Maybe the amp/source wasn't ideal but they were downright sloppy in my experience. With the the HD600, compared to most headphones I've listened through - no glaring flaws enabling me to focus on the music and trust that the presentation is correct, very good detail, a really nice cohesive sound characteristic, thick tuneful bass, and usable for extended listening sessions. All of these attributes are enhanced by the A20H. I couldn't ask for more to be honest. I haven't listened through the balanced output yet but will report my findings when I do.
 
Nov 14, 2016 at 1:29 PM Post #80 of 391
Nov 16, 2016 at 5:22 AM Post #81 of 391

​I ordered the A20H hopefully it will be arrived this week and make a short review! :)
 
Nov 16, 2016 at 3:26 PM Post #82 of 391
Nov 16, 2016 at 4:23 PM Post #83 of 391

The X20U is discontinued and no longer available.  Only the new X20U Pro unit will be for sale.  At least, that is what I get from reading.
 
Nov 17, 2016 at 8:28 PM Post #85 of 391
After running in for a couple days, the A20H sounds fuller and sweeter, compared to X20, this one is truly musical. It conveys music with a gentle touch and yet detail enough not to be aggressive as X20. The bass is fuller and not as tight and mid is a bit warmer, bringing out the range of vocals. The best part is the treble; it sounds sweet and silky smooth and making listening more enjoyable. There's a lot of low level details I have perceived previously not in X20 may be this may attributed to the use of AKM DACs. The Headphone amp is a good; with good drive to my Sennheiser HD650 and 6 selectable digital filters to cater to different sound needs. Overall, A20H is designed not just as a engineering point of view but a musical part of your Hi-Fi system. Well done Gustard!
 
 
Nov 18, 2016 at 5:45 PM Post #86 of 391
guymrob said:
  After running in for a couple days, the A20H sounds fuller and sweeter, compared to X20, this one is truly musical. It conveys music with a gentle touch and yet detail enough not to be aggressive as X20. The bass is fuller and not as tight and mid is a bit warmer, bringing out the range of vocals. The best part is the treble; it sounds sweet and silky smooth and making listening more enjoyable. There's a lot of low level details I have perceived previously not in X20 may be this may attributed to the use of AKM DACs. The Headphone amp is a good; with good drive to my Sennheiser HD650 and 6 selectable digital filters to cater to different sound needs. Overall, A20H is designed not just as a engineering point of view but a musical part of your Hi-Fi system. Well done Gustard!
 
Click to expand...

Have you listen on the speakers or just headphones?
What about sound stage if you compare to X20?
 
Nov 18, 2016 at 9:08 PM Post #88 of 391
rafabro said:
Have you listen on the speakers or just headphones?
What about sound stage if you compare to X20?
Click to expand...


In tired both speakers and headphones, my speakers is Dynaudio contour 1.8mk2 floorstand, VTL MB-125 monoblock power amps and VTL TL-2.5i preamp. Soundstage is more holographic with the sense of ambience; each instruments are clearly separated creating a wider soundstage compared to X20. What impressed me is how A20H handle music with a gentle touch and still able to bring out all the details smoothly without any hint of aggressiveness. This made music very enjoyable and one don't have deal with 'sound fatigue' after listening for a few hours. :D
 
Nov 18, 2016 at 9:12 PM Post #89 of 391
allinhead said:
does the amp have some gain like the h10
do you think the amp is powerfull to drive some planar (he 560)
thanks
tom
Click to expand...


Yes, there's low and high settings found in the menu. For headphones 32ohms set to 'Low' for my HD650, which above 100ohms, I set to 'High' I'm not sure what is impedance of your HE560 planar, but according output headphone amp specs, it should be able drive. It can put out 2.4W at 32 ohms.
 
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