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C158-6-851 Ceramic Bass-Midrange 

Closed Box design parameters

Vb: 2.3L, -16dB @ 40Hz, F-3dB: 98Hz, Q: 0.71 (typical)

Vb: 7L, -14dB @ 40Hz, F-3dB: 96Hz, Q: 0.50 (extended bass)

Vented Box design parameters

Vb: 10L, Port diameter: 40mm, Length: 145mm, Fres: 46Hz, F-3dB: 47Hz, Q: 0.58 (typical)

Vb: 15L, Port diameter: 40mm, Length: 100mm, Fres: 43Hz, F-3dB: 41Hz, Q: 0.50 (extended bass)

Vb: 6.5L, Port diameter: 40mm, Length: 220mm, Fres: 48Hz, F-3dB: 54Hz, Q: 0.61 (0.7dB Ripple @ 100Hz)

Highlights

6.25 inch bass-midrange for small bookshelf monitors or slim floorstanders
38mm titanium voice coil former120mm ferrite motor for high performance in small enclosures
Long excursion design for high SPL capabilities

C158-06-851_DimWeb-Draht.png

Dome material Ceramic
Application Bass‑Midrange
Overall diameter 158 MM
Cutout Diameter/Square 137 MM
Overall depth 90 MM
Motor assembly depth 42 mm
Motor assembly diameter 120 mm
   

Main Features

overhung motor design
38 mm voice coil
soft rubber surround
vented vc, pole piece & spider
35 HZ - 3000 HZ

TECHNOLOGY
Material
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Mechanical Data

Specification   Value Unit
Overall diameter   8158 mm
Cutout Diameter/Square   137 mm
Min. frontplate thickness   6 mm
Overall depth   90 mm
Motor assembly depth   42 mm
Motor assembly diameter   120 mm
Screwfitting   DIN 7984 / Ø 4.50 mm
Terminal   +: 6.3 x 0.8 / -: 4.8 x 0.8 mm
Shipping weight (pair)   5.2 Kg
Shipping box size (pair)   180 / 180 / 240 mm
   

Thiele/Small Parameters

Spezifikation   Wert Einheit
Sensitivity (2.83V / 1m) Spl 88 dB
DC-resistance Re 6.07 Ohm
Resonance frequency Fs 31 Hz
Equivalent volume of air Vas 25.7 ltr
Mechanical Q Qms 5.09  
Electrical Q Qes 0.29  
Total Q Qts 0.28  
EEffective piston area Sd 113 Cm2
Moving mass Mms 18.5 g
Suspension compliance CMs 1.42 mm/n
Mechanical resistance Rms 0.71 Kg*s
   

voice coil parameters

Specification   Value Unit
Power handling P 120 W
Linear excursion Xmax +/-5 mm
Voice coil diameter   38 mm
Voice coil former material   Ti  
Voice coil material   Cu  
Voice coil inductance Le 0.77 mH
Force factor Bl 8.7 N/A
Motor type   Underhung  
Ferrofluid filling   No  
   

Frequency Response [DB]

C158-6-851_FFT_prog.png

Impedance [Ohm]

C158-6-851_IMP_prog.png

Harmonic Distortion [%]

C158-6-851_DIST_prog.png

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