inputs.text: love beast - thing rocks 67mm xmaxexcursion thing acts like high efficient woofer woofer 61 cuf3 cab vented tuned 36hz sounds amazing clean punchy plays way keep steep lowpass around 30hzto protect excursion thing handle 300w day long 4ohm impedance really nice matching amplifiers 4ohms instead 8ohms really helps getting power amps helps save money not buy larger power amps push higher wattage 8ohmsas far using full range setup not tried really not designed true \\subwoofer\\ upper frequency roll proves