Yes, a sub (or 2 but one would likely be fine) out would be excellent IF the whole implementation had a SINAD at or above 78 & 16 bit depth. I (for sure) would be willing to pay more for those things (and a remote to control the volume with different inputs which may have different levels resulting in different volumes out).Aiyima missed the boat on this one imo, no sub out. I'm very happy with my A07s. On the A07 the 3.5mm aux. out can be used for full frequency applications as well as a powered sub. At $69-79 depending on the power supply option it's hard to beat. I have one of mine paired with a FX Audio DAC-SQ3 I got from Amazon for less than $50 with a Prime deal. So for $130 I have a very capable DAC with pre-amp volume control and a remote, and an amp with a sub out. Just no bluetooth in this setup which I wasn't looking for. Small footprint and they look good together : )