"The Cal.1H employs a 50mm driver with an infilled PET diaphragm. There is enough excursion to produce low-frequencies with ease and linearity without the unnecessary/overbearing side-effects."
"The high-sensitivity of the drivers used in the CAL.1H is an advantage for ones who are wanting to correct the Frequency Response to their liking/compensations."
Coupling : Circumaural
Transducer : Electrodyanamic (50mm, Infilled Polymer)
Impedance : ~28 Ohms
Sensitivity : ~105.36dB SPL/mW @1 kHz (approx avg ~104dB SPL/mW @1 kHz)
Driver Matching : Min ~0.1dB to Max ~0.4dB avg throughout the Frequency Response range.