Features

Very stiff lightweight paper cone with unique “MicroSphere” coating consisting of micro ceramic hollow spheres embedded in a polymer layer offers best possible impulse response without any sound colouration

The solid stainless steel phase plug improves off-axis response and further reduces compression effects

Special shaped rubber surround for long linear cone excursion

Solid, 24 carat gold-plated terminals for maximum conductivity

Aerodynamically shaped aluminum diecast basket with optimized voice coil ventilation

Ultra-precise machined magnet system for highest magnetic flux linearity

Technical data

Power RMS / max. - P - 120 / 170 Watts

Impedance - Z - 4 Ω

DC resistance - Re - 3,6 Ω

Frequency response - 40 Hz- 4,000 Hz

Resonance frequency - Fs - 50 Hz

Mechanical Q factor - Qms - 6.20

Electrical Q factor - Qes - 0.52

Total Q factor - Qts - 0.48

Compliance - Cms - 670 μm/N

Equivalent air volume - Vas - 17,6 L

Force factor - B*I - 5.7 Tm

Efficiency 1 W / 1 m - SPL - 88.5 dB

Cone area - Sd - 137 cm²

Moving mass - Mms - 14.8 g

Cone material - Paper cone with “MicroSphere” coating consisting of micro ceramic hollow spheres embedded in a polymer layer

Mechanical resistance - Rms - 0.76 kg/s

Voice coil diameter - ø - 37 mm / 1.5"

Voice coil winding height - 14 mm / 0.6"

Max. linear excursion - Xmax - +/- 4.0 mm

Outer diameter - ø - 167 mm / 6.5"

Installation diameter - ø - 143 mm / 5.6"

Installation depth - 64 mm / 2.5"

Recommended enclosure volumes  

Sealed box  

Net volume - 8 L

Lower limiting frequency (-3dB) - 68 Hz

Vented box  

Net volume - 15 L

Port diameter - ø - 60 mm / 2.4"

Port area - 28 cm²

Port length - 19 cm / 7.5"

Port tuning frequency - Fb - 45 Hz

Lower limiting frequency (-3dB) - 48 Hz