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.

To our building proposals with Accuton drivers.

Tweeter

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Accuton T25A-6

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Accuton T25A-6

order no. bliesma-t25a-6

EUR 172,55 excl. VAT: € 145.00 / $ 168.20

24 mm dome tweeter with aluminium dome.

frequency range = 1800-35000 Hz
resonance frequency fs = 870 Hz
impedance R = 6 Ohm
sound pressure level SPL = 92 dB (2,83V; 1m)
DC resistance Re = 5,2 Ohm
force factor BL = 2,6 N/A
voice coil inductance L = 0,008 mH
effective piston radiating area Sd = 5,7 cm²
effective mechanical mass incl. air load mms = 0,13 g
total Q factor Qts = 0,51 (Qms=1,35, Qes=0,82)
voice coil diameter = 24 mm
maximum peak linear excursion vibration x_lin = +/- 1 mm
mounting diameter d = 48 mm
overall diameter d = 68 mm
mounting depth (not countersunk) t = 26 mm

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Accuton T25B-6

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Bliesma T25B-6

order no. bliesma-t25b-6

EUR 340,00 excl. VAT: € 285.71 / $ 331.43

24 mm dome tweeter with beryllium dome.

frequency range = 1800-40000 Hz
resonance frequency fs = 870 Hz
impedance R = 6 Ohm
sound pressure level SPL = 93 dB (2,83V; 1m)
DC resistance Re = 5,2 Ohm
force factor BL = 2,6 N/A
voice coil inductance L = 0,008 mH
effective piston radiating area Sd = 5,7 cm²
effective mechanical mass incl. air load mms = 0,11 g
total Q factor Qts = 0,51 (Qms=1,35, Qes=0,82)
voice coil diameter = 24 mm
maximum peak linear excursion vibration x_lin = +/- 1 mm
mounting diameter d = 48 mm
overall diameter d = 68 mm
mounting depth (not countersunk) t = 26 mm

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Accuton T25S-6

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Bliesma T25S-6

order no. bliesma-t25s-6

EUR 172,55 excl. VAT: € 145.00 / $ 168.20

24 mm dome tweeter with fabric dome.

frequency range = 2200-22000 Hz
resonance frequency fs = 940 Hz
impedance R = 6 Ohm
sound pressure level SPL = 91 dB (2,83V; 1m)
DC resistance Re = 5,2 Ohm
force factor BL = 2,6 N/A
voice coil inductance L = 0,008 mH
effective piston radiating area Sd = 5,7 cm²
effective mechanical mass incl. air load mms = 0,16 g
total Q factor Qts = 0,51 (Qms=1,35, Qes=0,82)
voice coil diameter = 24 mm
maximum peak linear excursion vibration x_lin = +/- 1 mm
mounting diameter d = 48 mm
overall diameter d = 68 mm
mounting depth (not countersunk) t = 23 mm

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Accuton T34A-4

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Bliesma T34A-4

order no. bliesma-t34a-4

EUR 339,00 excl. VAT: € 284.87 / $ 330.45

34 mm dome tweeter with aluminium dome.

frequency range = 1300-35000 Hz
resonance frequency fs = 790 Hz
impedance R = 4 Ohm
sound pressure level SPL = 96 dB (2,83V; 1m)
DC resistance Re = 3,3 Ohm
force factor BL = 3,5 N/A
voice coil inductance L = 0,008 mH
effective piston radiating area Sd = 10,5 cm²
effective mechanical mass incl. air load mms = 0,28 g
total Q factor Qts = 0,35 (Qms=2,1, Qes=0,42)
voice coil diameter = 34 mm
maximum peak linear excursion vibration x_lin = +/- 1,55 mm
mounting diameter d = 78 mm
overall diameter d = 104 mm
mounting depth (not countersunk) t = 29,5 mm

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Accuton T34B-4

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Bliesma T34B-4

order no. bliesma-t34b-4

EUR 529,00 excl. VAT: € 444.54 / $ 515.66

34 mm dome tweeter with beryllium dome.

frequency range = 1300-40000 Hz
resonance frequency fs = 800 Hz
impedance R = 4 Ohm
sound pressure level SPL = 97,5 dB (2,83V; 1m)
DC resistance Re = 3,3 Ohm
force factor BL = 3,5 N/A
voice coil inductance L = 0,008 mH
effective piston radiating area Sd = 10,5 cm²
effective mechanical mass incl. air load mms = 0,26 g
total Q factor Qts = 0,35 (Qms=2,1, Qes=0,42)
voice coil diameter = 34 mm
maximum peak linear excursion vibration x_lin = +/- 1,55 mm
mounting diameter d = 78 mm
overall diameter d = 104 mm
mounting depth (not countersunk) t = 29,5 mm

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Mids

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Accuton M74A-6

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Bliesma M74A-6

order no. bliesma-m74a-6

EUR 419,00 excl. VAT: € 352.10 / $ 408.44

74 mm mids dome with aluminium dome.

frequency range = 400-6000 Hz
resonance frequency fs = 400 Hz
impedance R = 6 Ohm
sound pressure level SPL = 95 dB (2,83V; 1m)
DC resistance Re = 5,6 Ohm
force factor BL = 6,8 N/A
voice coil inductance L = 0,036 mH
effective piston radiating area Sd = 50,25 cm²
effective mechanical mass incl. air load mms = 2,3 g
total Q factor Qts = 0,67 (Qms=6,4, Qes=0,75)
voice coil diameter = 74 mm
maximum peak linear excursion vibration x_lin = +/- 1,2 mm
mounting diameter d = 100 mm
overall diameter d = 121 mm
mounting depth (not countersunk) t = 45 mm

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Accuton M74B-6

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Bliesma M74B-6

order no. bliesma-m74b-6

EUR 929,00 excl. VAT: € 780.67 / $ 905.58

74 mm mids dome with beryllium dome.

frequency range = 440-8000 Hz
resonance frequency fs = 440 Hz
impedance R = 6 Ohm
sound pressure level SPL = 97 dB (2,83V; 1m)
DC resistance Re = 5,6 Ohm
force factor BL = 6,8 N/A
voice coil inductance L = 0,036 mH
effective piston radiating area Sd = 50,25 cm²
effective mechanical mass incl. air load mms = 1,8 g
total Q factor Qts = 0,84 (Qms=7,6, Qes=0,94)
voice coil diameter = 74 mm
maximum peak linear excursion vibration x_lin = +/- 1,2 mm
mounting diameter d = 100 mm
overall diameter d = 121 mm
mounting depth (not countersunk) t = 45 mm

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Accuton M74P-6

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Bliesma M74P-6

order no. bliesma-m74p-6

EUR 419,00 excl. VAT: € 352.10 / $ 408.44

74 mm mids dome with paper dome.

frequency range = 400-4500 Hz
resonance frequency fs = 400 Hz
impedance R = 6 Ohm
sound pressure level SPL = 95 dB (2,83V; 1m)
DC resistance Re = 5,6 Ohm
force factor BL = 6,8 N/A
voice coil inductance L = 0,036 mH
effective piston radiating area Sd = 50,25 cm²
effective mechanical mass incl. air load mms = 2,3 g
total Q factor Qts = 0,5 (Qms=3, Qes=0,6)
voice coil diameter = 74 mm
maximum peak linear excursion vibration x_lin = +/- 1,2 mm
mounting diameter d = 100 mm
overall diameter d = 121 mm
mounting depth (not countersunk) t = 45 mm

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Accuton M74S-6

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Bliesma M74S-6

order no. bliesma-m74s-6

EUR 419,00 excl. VAT: € 352.10 / $ 408.44

74 mm mids dome with fabric dome.

frequency range = 425-4500 Hz
resonance frequency fs = 425 Hz
impedance R = 6 Ohm
sound pressure level SPL = 97 dB (2,83V; 1m)
DC resistance Re = 5,6 Ohm
force factor BL = 6,8 N/A
voice coil inductance L = 0,036 mH
effective piston radiating area Sd = 50,25 cm²
effective mechanical mass incl. air load mms = 2 g
total Q factor Qts = 0,62 (Qms=6,6, Qes=0,68)
voice coil diameter = 74 mm
maximum peak linear excursion vibration x_lin = +/- 1,2 mm
mounting diameter d = 100 mm
overall diameter d = 121 mm
mounting depth (not countersunk) t = 45 mm

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Accuton M142A-6

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recommended cabinet 1:
closed cabinet with 3,4 L volume
from 173/109 Hz (-3dB/-8dB)

recommended cabinet 2:
10 L volume bass reflex cabinet
with HP70 reflex tube, 9 cm long.
from 96/73 Hz (-3dB/-8dB).

Bliesma M142A-6

order no. bliesma-m142a-6

EUR 1045,00 excl. VAT: € 878.15 / $ 1018.66

137 mm mids dome with aluminium dome.

frequency range = 180-2800 Hz
resonance frequency fs = 65 Hz
impedance R = 6 Ohm
sound pressure level SPL = 94,5 dB (2,83V; 1m)
DC resistance Re = 5,4 Ohm
force factor BL = 8,8 N/A
voice coil inductance L = 0,03 mH
effective piston radiating area Sd = 180,3 cm²
effective mechanical mass incl. air load mms = 11 g
equivalent volume of compliance Vas = 24,6 l
total Q factor Qts = 0,3 (Qms=8,3, Qes=0,31)
voice coil diameter = 137 mm
maximum peak linear excursion vibration x_lin = +/- 1,85 mm
mounting diameter d = 158 mm
overall diameter d = 180 mm
mounting depth (not countersunk) t = 47,8 mm

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Accuton M142P-6

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recommended cabinet 1:
closed cabinet with 3,6 L volume
from 162/102 Hz (-3dB/-8dB)

recommended cabinet 2:
11,1 L volume bass reflex cabinet
with HP70 reflex tube, 9 cm long.
from 89/68 Hz (-3dB/-8dB).

Bliesma M142P-6

order no. bliesma-m142p-6

EUR 1050,00 excl. VAT: € 882.35 / $ 1023.53

137 mm mids dome with paper dome.

frequency range = 180-2200 Hz
resonance frequency fs = 63 Hz
impedance R = 6 Ohm
sound pressure level SPL = 94 dB (2,83V; 1m)
DC resistance Re = 5,4 Ohm
force factor BL = 8,8 N/A
voice coil inductance L = 0,03 mH
effective piston radiating area Sd = 180,3 cm²
effective mechanical mass incl. air load mms = 11,7 g
equivalent volume of compliance Vas = 24,6 l
total Q factor Qts = 0,31 (Qms=7,3, Qes=0,32)
voice coil diameter = 137 mm
maximum peak linear excursion vibration x_lin = +/- 1,85 mm
mounting diameter d = 158 mm
overall diameter d = 180 mm
mounting depth (not countersunk) t = 47,8 mm

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Accuton M142T-6

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recommended cabinet 1:
closed cabinet with 3,4 L volume
from 175/111 Hz (-3dB/-8dB)

recommended cabinet 2:
10 L volume bass reflex cabinet
with HP70 reflex tube, 9 cm long.
from 97/74 Hz (-3dB/-8dB).

Bliesma M142T-6

order no. bliesma-m142t-6

EUR 1245,00 excl. VAT: € 1046.22 / $ 1213.61

137 mm mids dome with high quality dome.

frequency range = 180-2800 Hz
resonance frequency fs = 66 Hz
impedance R = 6 Ohm
sound pressure level SPL = 94,5 dB (2,83V; 1m)
DC resistance Re = 5,4 Ohm
force factor BL = 8,8 N/A
voice coil inductance L = 0,03 mH
effective piston radiating area Sd = 180,3 cm²
effective mechanical mass incl. air load mms = 10,9 g
equivalent volume of compliance Vas = 24,6 l
total Q factor Qts = 0,3 (Qms=9,2, Qes=0,31)
voice coil diameter = 137 mm
maximum peak linear excursion vibration x_lin = +/- 1,85 mm
mounting diameter d = 158 mm
overall diameter d = 180 mm
mounting depth (not countersunk) t = 47,8 mm

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Tweeter Mids

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.