Another consideration to take into account is The Effect of Distance on SPL. A speaker with a sensitivity rating of 95 dB @ 1W/50cm, has the same SPL as a speaker rated at 89 dB @ 1W/1m and the same as a speaker rated at 109 dB @ 1W/10 cm. This is due to a ~6 dB increase with each halving of the measurement distance, and a 20 dB increase when decreasing the distance to 1/10 of the original, giving us the tables below.