>Room 20 x 16...thinking of 2 10" subs...would this be wise?
For what purpose? Ported/passive radiator, bandpass, or sealed?
For most music (even electronic music) peaks in the last octave don't have 1/10th the power that they have in the rest of the spectrum. You should be OK.
I don't know about organ music.
For reference level home theater a pair of 10" sub-woofers will be woefully short. A pair of 15" sub-woofers there are short.
For what purpose? Ported/passive radiator, bandpass, or sealed?
For most music (even electronic music) peaks in the last octave don't have 1/10th the power that they have in the rest of the spectrum. You should be OK.
I don't know about organ music.
For reference level home theater a pair of 10" sub-woofers will be woefully short. A pair of 15" sub-woofers there are short.