C90-6-079

.The  C90 - 6 - 079  is a  5 inch midrange driver with ultra hard ceramic dome. Anti-resonant cutout fills in the ceramic dome provide for damping of the 8 kHz dome resonance. A  FEA optimized  overhung motor design with 38 mm aluminium voice coil former and ferrofluid filling guarantees excellent heat transfer.  The low mass inverted fabric surround and a  thin fabric spider  center the moving parts with high linearity.As a typical home stereo  midrange driver, we recommend our C90 - 6 - 079 for an application from 250 Hz – 5000 Hz.

Mechanical Data

Overall diameter/square

mm 

130 

Cutout diameter/square

mm 

111 

Frontplate depth

mm 

6.5 

Overall depth

mm 

64.5 

Motor assembly depth

mm 

32 

Motor assembly diameter

mm 

102 

Screw fitting

 

DIN 7984, 4mm 

Terminal

mm 

+ : 6.3 x 0.8 / - : 4.8 x 0.8 

Shipping weight /net weight (one piece)

kg 

2.0 / 1.8 

Shipping box size (pair)

mm 

180 / 180 / 240 

Thiele/Small Parameters

Sensitivity (2.83V / 1m)

dB 

87.5 

Lp

DC-resistance

Ohm 

5.9 

Re

Resonance frequency

Hz 

105 

Fs

Equivalent volume of air

L 

3.2 

Vas

Mechanical Q

 

0.9 

Qms

Electrical Q

 

1.52 

Qes

Total Q

 

0.57 

Qts

Effective piston area

cm² 

75 

Sd

Moving mass

g 

5.7 

Mms

Suspension compliance

mm/N 

0.39 

Cms

Mechanical resistance

kg * s 

4.2 

Rms

Voice Coil Data

Power handling

Watt 

120 

P 

Linear excursion

mm 

+/- 2.6 

Xmax 

Voice coil diameter

mm 

38 

 

Voice coil former material

 

Al 

 

Voice coil material

 

Cu 

 

Voice coil inductance

mH 

0.12 

Le 

Force factor

N/A 

3.84 

Bl 

Motor type

 

Overhung 

 

Ferrofluid filling

 

yes 

 

Frequency Response [dB]

Impedance [Ohm]

Harmonic Distortion [%]