event tr8's: Frequency Response: 35Hz - 20kHz, +/-3dB, ref 500Hz
hr624: Low Frequency Response –3dB at 49Hz High Frequency Response –3dB at 22kHz
hr824:Lower cutoff frequency -3 dB @ 38Hz, Upper cutoff frequency -3 dB @ 22.5kHz
adam p11a: 48 Hz - 35 kHz

is the extra low bandwidth important?