Is my room too small

FWIW, my room is 11*15, speakers along long wall, my seat < 1' from rear wall, which is treated w/ 4" thick bass panels behind my head, reflective side out; the ear ignores reflections < 10ms which a panel close to the head provides in mid-upper freq's while absorbing bass freq's which take longer to reflect and thus cause smearing, as Daverz mentioned.

i'm +/- 5db to 40hz or so IIRC. without room treatments, expect to be +/- 20db. seriously

put room treatment in, and you will be fine. see my system pics.

without room treatment, its will never be much beyond midfi. you listen to your speakers interacting with your room being fed by your electronics, in that order.