Gladen Zero PRO 6.5 "mid bass, pair (ZPDC-3ohm)

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-165ZPDC-3
DC resistance Rdc 2.7 O
Nominal impedance ZN 3 O
Resonance frequency fs 52.59 Hz
Voice coil diameter 37 mm
Mechanical Q factor Qms 3.78
Electrical Q factor Qes 0.49
Total Q factor Qts 0.44
Moving mass Mms 14.81 g
Effective piston area Sd 135 cm2
Mechanical resistance Rms 1.29 Kg / s
Compliance Cms 0.62 mm / N
Force factor BL 5.17 Tm
Equivalent air volume Vas 15.83 dm3
Efficiency? 0.45%
SPL 2.83V / 1m 93.25 dB
Cone: Paper
Spider: Nomex
Surround: Rubber
Coil former: Aluminum
Basket: Aluminum
Dust cap: Silk