C173-6-090

Ceramic Midrange

DOMEMATERIAL:
Ceramic
APPLICATION:
Midrange
NOMINAL DIAMETER:
173 mm
SENSITIVITY:
93 dB
MAIN FEATURES:
SPECIAL DOME CUTOUTS
UNDERHUNG MOTOR DESIGN
55 MM TITANIUM VC FORMER
SOFT FABRIC SURROUND
VENTED VC, POLE PIECE & SPIDER
80 HZ - 3.2 KHZ IN CLOSED 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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C173-6-090

Highlights:

  • 7 inch midrange with tissue suround with high efficiency  for 3 way designs
  • large sized voice coil with 55mm titanium voice coil former for high midrange resolution 
  • big, underhung 120mm Neodymium magnet system for very low distortion
  • Anti-resonant cutout fills in the ceramic dome provide high damping of the 5 kHz dome resonance

Closed Box design parameters:

Vb: 2L, -13dB @ 80Hz, F-3dB: 160Hz, Q: 0.71 (typical)

Vb: 4.5L, -10dB @ 80Hz, F-3dB: 170Hz, Q: 0.50 (clean transient response)

Mechanical Data
Overall diameter/square
mm 
173 
Cutout diameter/square
mm 
145.6 
Frontplate depth
mm 
6.35 
Overall depth
mm 
96.35 
Motor assembly depth
mm 
44 
Motor assembly diameter
mm 
120 
Screw fitting
 
DIN 7984, 4mm 
Terminal
mm 
+ : 6.3 x 0.8 / - : 4.8 x 0.8 
Shipping weight /net weight (one piece)
kg 
3.76 / 3.44 
Shipping box size (pair)
mm 
210 / 140 / 210 
Thiele/Small Parameters
Sensitivity (2.83V / 1m)
dB 
93 
Lp
DC-resistance
Ohm 
6.61 
Re
Resonance frequency
Hz 
57 
Fs
Equivalent volume of air
15.5 
Vas
Mechanical Q
 
3.75 
Qms
Electrical Q
 
0.26 
Qes
Total Q
 
0.26 
Qts
Effective piston area
cm² 
133 
Sd
Moving mass
14 
Mms
Suspension compliance
mm/N 
0.56 
Cms
Mechanical resistance
kg * s 
1.32 
Rms
Voice Coil Data
Power handling
Watt 
120 
Linear excursion
mm 
+/- 5 
Xmax 
Voice coil diameter
mm 
55 
 
Voice coil former material
 
Ti 
 
Voice coil material
 
Cu 
 
Voice coil inductance
mH 
0.19 
Le 
Force factor
N/A 
11.6 
Bl 
Motor type
 
Underhung 
 
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