Accuton AS190-9-251 Cell

8" (20cm) Cell Concept Keramik- Sandwich Tieftöner, 9 Ohm, being the first in an entirely new approach to accuton speaker design. An ideal acoustical center has been achieved, which is identical with our CELL tweeters and midranges. Its novel designed overhung motor combines the advantages of traditional over- and underhung designs, delivering high linear excursion and ultra low distortion. An exceptionally hard aluminum sandwich dome was developed for the CELL bass drivers that allows for negligible delay and energy storage. The hidden surround serves for reduced outer diameter and linear excursion of +/- 16mm. A new developed spider shape makes huge excursion without compression possible. We recommend our AS190-9-252 for an application from 30 Hz – 1000 Hz.

Vented box design parameters:

• Vb: 24L, Port diameter: 70mm, Length: 300mm, Fres: 36Hz, F-3dB: 36Hz, Q: 0.58 (optimal)
• Vb: 35L, Port diameter: 70mm, Length: 245mm, Fres: 33Hz, F-3dB: 30Hz, Q: 0.50 (extended bass)

Closed Box design parameters:

• Vb: 11L, -9dB @ 40Hz, F-3dB: 63Hz, Q: 0.71 (typical)
• Vb: 35L, -7dB @ 40Hz, F-3dB: 70Hz, Q: 0.50 (extended bass)

Mechanical Data:

•     Overall diameter/square: 190 mm
•     Cutout diameter/square: 167 mm
•     Frontplate depth: 16 mm
•     Overall depth: 135,5 mm
•     Motor assembly depth: 52 mm
•     Motor assembly diameter: 156 mm
•     Screw fitting:  DIN 7984, 4 mm
•     Terminal: + : 6.3 x 0.8 / - : 4.8 x 0.8
•     Shipping weight /net weight (one piece): 6,5 / 6 kg
•     Shipping box size (pair): 245 / 220 / 245 mm

 Thiele / Small Parameter:

•     Sensitivity Lp (2.83V / 1m): 85 dB
•     DC-resistance Re: 9,0 Ohm
•     Resonance frequency Fs: 39 Hz
•     Equivalent volume of air Vas: 20 L
•     Mechanical Q Qms: 5,00
•     Electrical Q Qes: 0,48
•     Total Q Qts: 0,45
•     Effective piston area Sd: 202 cm²
•     Moving mass Mms: 48 g
•     Suspension compliance Cms: 0,35 mm/N
•     Mechanical resistance Rms: 2,3 kg * s

Voice Coil Data:

•     Power handling P: 250 Watt
•     Linear excursion xmax: +/- 9 mm
•     Voice coil diameter: 78 mm
•     Voice coil former material: Ti
•     Voice coil material: CCAW
•     Voice coil inductance Le: 0,6 mH
•     Force factor Bl: 13,6
•     Motor type: Overhung
•     Ferrofluid: no