Ok so after completing my audio chain with some good XLR cables (Van den Hul 3T The Mountain) and power cables I could compare the RME ADI-2 amp out versus the Topping A90 with my HD650s.
I have to admit from what I'm hearing now that I was wrong before saying that the ADI 2 amp is bad with my 650s. The problem with the midrange was because of the AKMs 'Velvet Sound', where the midrange takes a dip and sounds smoother, because I prefer the ESS sound signature, I fixed that with some EQ, raised 2,3,4,5k by 2db.
Now why do I prefer the ADI-2 amp vs. the A90? The differences are very small, ADI-2 has more air and space, and somehow sounds cleaner then the A90. The A90 has more bass, slam but sounds more closed in. If you want more slam with the ADI-2 you can boost up the bass or other frequencies. Its that simple.
The 3T XLR cable costs more then the RME (its worth every penny imho), with a good power cable and the A90 I could've bought 2 more RMEs. My mistake was not spending more time fiddling with the EQ, filters and other settings until I found the sound I enjoy.
So please, if you don't like something about the ADI-2, remember how many settings it has, and you can make it sound as you like with no extra cost. It really is an incredible DAC/AMP.
I have to admit from what I'm hearing now that I was wrong before saying that the ADI 2 amp is bad with my 650s. The problem with the midrange was because of the AKMs 'Velvet Sound', where the midrange takes a dip and sounds smoother, because I prefer the ESS sound signature, I fixed that with some EQ, raised 2,3,4,5k by 2db.
Now why do I prefer the ADI-2 amp vs. the A90? The differences are very small, ADI-2 has more air and space, and somehow sounds cleaner then the A90. The A90 has more bass, slam but sounds more closed in. If you want more slam with the ADI-2 you can boost up the bass or other frequencies. Its that simple.
The 3T XLR cable costs more then the RME (its worth every penny imho), with a good power cable and the A90 I could've bought 2 more RMEs. My mistake was not spending more time fiddling with the EQ, filters and other settings until I found the sound I enjoy.
So please, if you don't like something about the ADI-2, remember how many settings it has, and you can make it sound as you like with no extra cost. It really is an incredible DAC/AMP.