This is a great starter amp when paired with a quality entry-level DAC. I currently have the standard gain model paired with the standalone Massdrop SDAC and I'm really blown away with how much it has improved my laptops audio. I have it driving my Hifiman HE4xx, Sennheiser HD6XX, and my AKG K7XX and it does a wonderful job running all three. I have a Massdrop CTH to compare to and I can say that with a good DAC it greatly complements that amp.
mbofieSince this review i have added 3 more pairs of headphones to my collection: Beyerdynamic DT 770 250 ohm, Massdrop x Beyerdynamic DT 177X GO 32 ohm, and the Cooler Master MH752's. Listing them off from most bass to less its : Beyerdynamic DT 770 250 ohm, Massdrop x Beyerdynamic 177X GO, Cooler Master MH752, Sennheiser HD6XX, AKG K7XX, and finally the Hifiman HE4XX. I would say that in some ways the DT 770 is a bass monster but its bass is less tight than the 177X GO, but if you want that sonic slam of heavy bass then it has to equal from the headphones that i have listened to so far.