SCAN SPEAK Tiefmitteltöner 18W/8542-10 Classic

The Symmetric Drive (SD) concept with copper in the magnet system was invented by Scan-Speak. High-quality magnet system design has thus been a key feature of Scan-Speak design since the companys inception. The Classic woofers are highly praised, and are used in some of the worlds most exceptional high-end Loudspeakers. Some feature Kevlar cones, others have the innovative Carbon fibre paper cones.

T-S Parameters:

• Resonance frequency [fs]: 30 Hz
  
• Mechanical Q factor [Qms]: 1.70
  
• Electrical Q factor [Qes]: 0.26
  
• Total Q factor [Qts]: 0.23
  
• Force factor [Bl]: 7.8 Tm
  
• Mechanical resistance [Rms]: 1.66 kg/s
  
• Moving mass [Mms]: 15 g
  
• Suspension compliance [Cms]: 1.88 mm/N
  
• Effective diaph. diameter [D]: 131 mm
  
• Effective piston area [Sd]: 135 cm²
  
• Equivalent volume [Vas]: 47.9 l
  
• Sensitivity (2.83V/1m): 89 dB
  
• Ratio Bl/√Re: 3.33 N/√W
  
• Ratio fs/Qts: 133 Hz

Electrical Data:

• Nominal impedance [Zn]: 8 K
  
• Minimum impedance [Zmin]: 6.6 K
  
• Maximum impedance [Zo]: 41.5 K
  
• DC resistance [Re]: 5.5 K
  
• Voice coil inductance [Le]: 0.2 mH
  

Power Handling:

• 100h RMS noise test (IEC 17.1): 70 W
  
• Long-term max power (IEC 17.3): - W
  

Voice Coil and Magnet Data:

• Voice coil diameter: 42 mm
  
• Voice coil height: 19 mm
  
• Voice coil layers: 2
  
• Height of gap: 6 mm
  
• Linear excursion: ± 6.5 mm
  
• Max mech. excursion: ± 10 mm
  
• Unit weight: 2.1 kg

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