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Thiel & Partner: Accuton

Thiel & Partner knows to produce aluminiumoxyde cones.

What makes a Thiel ceramic loudspeaker driver so special?
First and most important of all, it is the membrane itself. Only in a Thiel (ACCUTON) ceramic membrane you will find such desirable features as extreme cone ridigity and hardness which is needed for speed and accurate impulse response. The stiffness/weight ratio of this material is unsurpassed, the only exception being diamond. Also you will find a very high internal sound velocity which is important for a high breakup frequency point and extended linear range.

The unique electro-chemical manufacturing process out of aluminum foil leads to very thin, form-stable diaphragms of Al2O3 in Sapphire lattice with high internal damping, unusual for such hard material. This feature is very important and responsible for very low coloration and distortion, unachieved by other membrane materials. It allows the use of first order filters even in 2-way loudspeaker designs.

The well balanced concave shape yields wide and uniform energy distribution, which is far more important than high on axis sound pressure. All mechanical parts are manufactured to high standards and very close tolerances, usually better than conventional drive units.

On request we also deliver loudspeakers with cones made of diamonds. The chassis are not available for DIY.


 

Tweeter


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BD20-6-031       order no. T-bd20-6-031       on request
20 mm tweeter with diamond cone. Voice coil windings immersed in magnetic fluid increase short term power handling capacity. In linear operation the underhang voice coil remains completely within the magnetic field.
  • power handling (continuous/programme) = 120 W
  • frequency range = 2500-80000 Hz
  • resonance frequency fs = 950 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 89 dB (2,83V; 1m)
  • DC resistance Re = 6,2 Ohm
  • force factor BL = 3,21 N/A
  • voice coil inductance L = 0,01 mH
  • effective piston radiating area Sd = 3,46 cm2
  • effective mechanical mass incl. air load mms = 0,19 g
  • total Q factor Qts = 0,31 (Qms=0,54, Qes=0,71)
  • voice coil diameter = 19,4 mm
  • mounting diameter d = 64 mm
  • overall diameter d = 82 mm
  • mounting depth (not countersunk) t = 57 mm
  • mass m = 0,38 kg
PDF data sheet
 

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BD25-6-034       order no. T-bd25-6-034       on request
25 mm tweeter with diamond cone. In linear operation the underhang voice coil remains completely within the magnetic field.
  • power handling (continuous/programme) = 120 W
  • frequency range = 2000-60000 Hz
  • resonance frequency fs = 1189 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 91 dB (2,83V; 1m)
  • DC resistance Re = 6,3 Ohm
  • force factor BL = 2,61 N/A
  • voice coil inductance L = 0,02 mH
  • effective piston radiating area Sd = 6,38 cm2
  • effective mechanical mass incl. air load mms = 0,25 g
  • total Q factor Qts = 1,01 (Qms=2,30, Qes=1,79)
  • voice coil diameter = 16,4 mm
  • mounting diameter d = 64 mm
  • overall diameter d = 82 mm
  • mounting depth (not countersunk) t = 57 mm
  • mass m = 0,38 kg
PDF data sheet
 

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BD30-6-036       order no. T-bd30-6-036       on request
30 mm tweeter with diamond cone. In linear operation the underhang voice coil remains completely within the magnetic field.
  • power handling (continuous/programme) = 120 W
  • frequency range = 1800-50000 Hz
  • resonance frequency fs = 908 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 92 dB (2,83V; 1m)
  • DC resistance Re = 6,0 Ohm
  • force factor BL = 3,75 N/A
  • voice coil inductance L = 0,03 mH
  • effective piston radiating area Sd = 8,55 cm2
  • effective mechanical mass incl. air load mms = 0,43 g
  • total Q factor Qts = 0,69 (Qms=2,01, Qes=1,04)
  • voice coil diameter = 19,4 mm
  • mounting diameter d = 64 mm
  • overall diameter d = 82 mm
  • mounting depth (not countersunk) t = 57 mm
  • mass m = 0,44 kg
PDF data sheet
 

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BD50-6-039       order no. T-bd50-6-039       on request
50 mm tweeter with diamond cone. In linear operation the underhang voice coil remains completely within the magnetic field.
  • power handling (continuous/programme) = 120 W
  • frequency range = 800-30000 Hz
  • resonance frequency fs = 290 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 93 dB (2,83V; 1m)
  • DC resistance Re = 5,8 Ohm
  • force factor BL = 5,64 N/A
  • voice coil inductance L = 0,04 mH
  • effective piston radiating area Sd = 23,8 cm2
  • effective mechanical mass incl. air load mms = 1,71 g
  • total Q factor Qts = 0,46 (Qms=2,27, Qes=0,57)
  • voice coil diameter = 30,5 mm
  • mounting diameter d = 88 mm
  • overall diameter d = 106 mm
  • mounting depth (not countersunk) t = 67,5 mm
  • mass m = 0,88 kg
PDF data sheet
 
The cabinet volume calculations are executed considering an external resistance of 0.3 Ohm. We are using, if no other data is known or available, the information supplied by the manufacturer.

Please note: the frequency response doesn't say much about the cut-off frequency inside the cabinet! Therefore, we mostly give you 2 examples with dimensioning considerations and an indication, how low the loudspeaker will reproduce.

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© Copyright 2010 Iris Strassacker; All rights reserved. - errors and omissions excepted