Autotek Bass Thrust 12" Kevlar Woofer F(Hz) Amplitude - H Arbitrary Scale (1-13) -------- ------ 20 4 30 5.25 40 6.5 50 7 60 7.25 100 8.25 200 8.25 500 8.25 1000 8.7 2000 9.75 5000 0.5 10000 0.5* '68 Magnavox Horn Tweeter F(Hz) Amplitude - Arbitrary Scale (1-13) ----- ------- <100 0 100 1.5 200 3.25 500 8.25 1000 12.25 2000 12.25 5000 8.75 ..15k Audible *Above 5000hz the response of the microphone is no longer accurate.