C158-8-085

Ceramic Bass-Midrange

DOMEMATERIAL:
Ceramic
APPLICATION:
Bass-Midrange
NOMINAL DIAMETER:
158 mm
SENSITIVITY:
89 dB
MAIN FEATURES:
OVERHUNG MOTOR DESIGN
25 MM TITANIUM VC FORMER
SOFT RUBBER SURROUND
VENTED VC, POLE PIECE & SPIDER
38 HZ - 3 KHZ IN VENTED BOX

Material & Fabrication Ceramic

pic

Alpha corundum or saphire is one of the best material choices for speaker cones. It is light, yet very stiff and if it is made by the electrochemical process we have invented in the 80’s of last century, it also has a quite nice internal damping factor, all that a speaker membrane is supposed to have.

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C158-8-085

Highlights:

  • 6.25 inch bass-midrange for small bookshelf monitors or slim floorstanders
  • small and light voice coil with 25mm titanium voice coil former for high midrange resolution 
  • long excursion design for high SPL capabilities

Vented Box design parameters:

Vb: 15L, Port diameter: 50mm, Length: 190mm, Fres: 41Hz, F-3dB: 45Hz, Q: 0.58 (typical)

Vb: 22L, Port diameter: 50mm, Length: 130mm, Fres: 40Hz, F-3dB: 40Hz, Q: 0.50 (extended bass)

Vb: 12L, Port diameter: 50mm, Length: 200mm, Fres: 45Hz, F-3dB: 49Hz, Q: 0.61 (0.7dB Ripple @ 100Hz)

Closed Box design parameters:

Vb: 8.5L, -11dB @ 40Hz, F-3dB: 70Hz, Q: 0.71 (typical)

Vb: 22L, -8.5dB @ 40Hz, F-3dB: 70Hz, Q: 0.50 (extended bass)

Mechanical Data
Overall diameter/square
mm 
158 
Cutout diameter/square
mm 
137 
Frontplate depth
mm 
Overall depth
mm 
82 
Motor assembly depth
mm 
34 
Motor assembly diameter
mm 
85 
Screw fitting
 
DIN 7984, 4mm 
Terminal
mm 
+ : 6.3 x 0.8 / - : 4.8 x 0.8 
Shipping weight /net weight (one piece)
kg 
1.75 / 1.65 
Shipping box size (pair)
mm 
180 / 180 / 240 
Thiele/Small Parameters
Sensitivity (2.83V / 1m)
dB 
89 
Lp
DC-resistance
Ohm 
7.8 
Re
Resonance frequency
Hz 
33 
Fs
Equivalent volume of air
35 
Vas
Mechanical Q
 
4.12 
Qms
Electrical Q
 
0.34 
Qes
Total Q
 
0.31 
Qts
Effective piston area
cm² 
113 
Sd
Moving mass
11.6 
Mms
Suspension compliance
mm/N 
1.89 
Cms
Mechanical resistance
kg * s 
0.53 
Rms
Voice Coil Data
Power handling
Watt 
100 
Linear excursion
mm 
+/- 5 
Xmax 
Voice coil diameter
mm 
25 
 
Voice coil former material
 
Ti 
 
Voice coil material
 
Cu 
 
Voice coil inductance
mH 
0.54 
Le 
Force factor
N/A 
7.5 
Bl 
Motor type
 
Overhung 
 
Ferrofluid filling
 
no 
 
Frequency Response [dB]
Impedance [Ohm]
Harmonic Distortion [%]

Thiel & Partner GmbH

Kantstraße 1

D-50259 Pulheim

t +49 (0) 22 38 / 475475

info@accuton.com