Gladen Zero PRO 80 3" keskiääni, pari

High-End Systems
Sand-coated paper cone
Die-cast basket
Rear chamber tweeter
Zero Point Dust Cap
Nomex spider
38 mm voice coil
Made in Germany

Name HG-80ZPPP-3
DC resistance Rdc 3,4 O
Nominal impedance ZN 4 O
Resonance frequency fs 113,2 HZ
Voice coil diameter 19 mm
Mechanical Q factor Qms 3,78
Electrical Q factor Qes 0,39
Total Q factor Qts 0,35
Moving mass Mms 2,84 g
Effective piston area Sd 33,2 cm2
Mechanical resistance Rms 0,54 Kg/s
Compliance Cms 0,70 mm/N
Force factor BL 4,23 Tm
Equivalent air volume Vas 1,08 dm3
Efficiency ? 0,39 %
SPL 2,83V/1m 91,64 dB
High-pass / Hochpass > 350 Hz 18 dB/Oct
 > 400 Hz 12 dB/Oct
Cone: Paper
Spider: Nomex
Surround: Rubber
Coil former: Aluminum
Basket: Steel
Phase Plug: Aluminum