my 12' X 18' room has worked great. i have a bay window and an 11' stepped ceiling that have really helped. you will need to treat the walls for reflections. i spent 2 years experimenting with different levels of wall treatment before i got it right. getting the right balance between live and damped is important.
consider floor to ceiling shelving behind your seating position for cds and lps. they work great as a diffuser and reduce shelf clutter. you don't want to lose any width from 12'.
your biggest challenge will be smoothing the bass and avoiding a mid-bass bloat. consider raising the height of your speakers to decouple your woofers from the floor boundary.
the biggest advantage of a relatively small room is that you can control what is happenning better than in a large room. good luck!
consider floor to ceiling shelving behind your seating position for cds and lps. they work great as a diffuser and reduce shelf clutter. you don't want to lose any width from 12'.
your biggest challenge will be smoothing the bass and avoiding a mid-bass bloat. consider raising the height of your speakers to decouple your woofers from the floor boundary.
the biggest advantage of a relatively small room is that you can control what is happenning better than in a large room. good luck!