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ceramic drivers - carefully made in Germany by Thiel & Partner GmbH, D-50259 Pulheim
ACCUTON C²12-6
item number: #C12-A6/16/3/1-2.5F55/12-T700

Ceramic tweeter Accuton C²12-6 Frontface
 High efficiency, ferrofluid filled tweeter with 25 mm light weight concave ceramic dome. Perfect choice for 3-way systems or small, low-output 2-way designs. Very high resolution and very good dispersion up to 42 kHz. Low resonance frequency allows first order filtering and a crossover frequency as low as 2 kHz.

The ultra hard ceramic dome material moves like a piston well above the audible frequency band and the high internal sound velocity features very low distortion and virtually no coloration.

 Ceramic tweeter Accuton C²12-6 Sideview
recommended frequency range: 2.5 kHz - 40 kHz

Thiele/Small Parameters:
Sensitivity E 89.5 dB
DC-resistance R 6.0 Ohm
resonance frequency fres 800 Hz
Equivalent vol. of air Vas   l
mechanical Q Qms    
electrical Q Qes    
total Q Qts    
effective piston area S 6.1 cm²
moving mass Mms 0.2 g
Suspension Compliance Cms   mm/N
mechanical reststance Rms   kg/s-1
Voice coil / Magnet Data:
Power handling, filtered P 100 Watt
Voice coil diameter D 16.4 mm
Voice coil former   Al  
Voice coil height h 3.0 mm
Number of layers   1  
Voice coil inductance Lbm 0.04 mH
pole plate thickness   2.5 mm
linear excursion Xmax   mm
Flux density B 1.70 T
Force factor BL   NA-1
Ferrofluid filling   yes  


waterfall diagram ACCUTON C²12-6
Spectral decay (waterfall) plot with Z-axis in periods. Signal is 6 Volt cosine burst with a length of 5 perids.
Some irregularities at 1.8 - 3 kHz due to reflections in the measuring room

Mechanical Dimensions:
Outer Dimensions 82 x 82 mm
Cutout Dimensions 64 x 64 mm
Frontplate Thickness 6,0 mm
Overall Depth 56 mm
Mounting hole diam. 4.0 mm
Mounting hole distance 72 x 72 mm
Frontplate corner radius 5.0 mm
Cutout hole corner radius 15.5 mm
Shipping information:
net weight / piece 530 g
gross weight / pair 1260 g
box size / pair 29 x 9.5 x 14 cm
     
quantity shipping unit 18 pcs
weight shipping unit 12.5 kg
size shipping unit 45 x 30 x 31 cm
shipping box carton  
Click below for more technical information of this driver: 
 
» C²12-6 ATB K2 and K3 distortion measurements - HTML-22 KByte 
opens next window with ATB measurements of K2 and K3 distortion. Measurements made by Bernhard Thiel with IEC norm baffle.
» C²12-6 MLSSA measurements - HTML-24 KByte 
opens next window with MLSSA measurements made in box by Dipl.Ing. Bernd Timmermanns, former chief editor of "Klang & Ton", now chief editor of "Hobby Hifi", the German speaker builder magazine. Measurements include amplitude (SPL), impedance, step response and spectral decay plot (waterfall diagram).
» C²12-6 ATB measurements - PDF-16 KByte 
opens a PDF file with ATB measurements of amplitude, on axis and 30 degrees, impedance, step response, K2 and K3 distortion. Measurements made by Bernhard Thiel with IEC norm baffle. You will need Adobe Acrobat Reader 4.0 to view this file.
» C²12-6 technical drawing - PDF-30 KByte 
opens a PDF file with technical drawing of this driver. You will need Adobe Acrobat Reader 4.0 to view this file.
» to ceramic driver overview