4″ SB12CACS25-8 / Ceramic

Features

  • Vented cast aluminium chassis for optimum strength and low compression
  • Ceramic cone
  • Soft low damping rubber surround for improved transient response
  • Shorting ring in motor system for reduced distortion.
  • Non-conducting fibre glass voice coil former for minimum damping
  • CCAW voice coil for reduced moving mass
  • Long life silver lead wires
  • Vented pole piece for reduced compression
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Additional information

Nominal Impedance

8 Ω

DC resistance

Re 6.4 Ω

Voice coil inductance

Le 0.34 mH

Effective piston area

Sd 50 cm2

Voice coil diameter

25.4 mm

Voice coil height

15 mm

Air gap height

5 mm

Linear coil travel (p-p)

10 mm

Magnetic flux density

1.07 T

Magnet weight

0.40 kg

Net Weight

0.92 kg

Free air resonance

Fs 51 Hz

Sensitivity

(2.83 V / 1 m) 85.5 dB

Mechanical Q-factor

Qms 4.85

Electrical Q-factor

Qes 0.4

Total Q-factor

Qts 0.37

Moving mass incl. air

Mms 5.3 g

Force factor

Bl 5.2 Tm

Equivalent volume

VAS 6.5 liters

Compliance

Cms 1.84 mm/N

Mechanical loss

Rms 0.35 kg/s

Rated power handling

* 30 W

Note

* IEC 268-5, T/S parameters measured on drive units that are broken in.

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