Metro Fi.200:
"Single High Performance Dynamic Speaker"
"Gold Plated Connector"
"10Hz - 20,00kHz Freq Response"
"104 dB SPL/mW, 1kHz Sensitivity"
"16 OHMS Impendance"
Metro Fi.100:
"Dynamic Speaker"
"Stereo Plug"
"40Hz - 17,00kHz Freq Response"
"103 dB SPL/mW, 1kHz Sensitivity"
"17 OHMS Impendance"
Got this from my Metro.Fi 100 safety/instruction sheet thingy. They probably wont mean much.