Yes, though potentially achievable at half the price with the SMSL D-6, if you don't need a built in headphone Amp.
Plus, if your Sub doesn't have to have pass-through, then there are a few more options:
-Paradigm SUB 10
Here's how much they can output at any given frequency without distorting (this is not frequency response!):
View attachment 265278
(data for the SUB 10 is only given as a single AVG value for 20-31.5Hz and another AVG for 40-60Hz, so take that graph with a grain of salt. The other three are fine)