COPPIA MID RANGE DA 80 mm 

Name HG-80PRO

DC resistance Rdc 2,6 Ω

Nominal impedance ZN 3 Ω

Resonance frequency fs 91,4 HZ

Voice coil diameter 25 mm

Mechanical Q factor Qms 2,79

Electrical Q factor Qes 0,36

Total Q factor Qts 0,32

Moving mass Mms 4,09 g

Effective piston area Sd 35 cm2

Mechanical resistance Rms 0,84 Kg/s

Compliance Cms 0,74 mm/N

Force factor BL 4,1 Tm

Equivalent air volume Vas 1,28 dm3

Efficiency η 0,26 %

SPL 2,83V/1m 91 dB

High-pass / Hochpass > 270 Hz 18 dB/Oct

> 320 Hz 12 dB/Oct