12″ SB34SWPL76-3-DV / Paper


  • Long stroke design
  • Linear high stability suspension
  • Higher shore hardness rubber surround
  • Dual 3’’ copper voice coil
  • Non-conducting reinforced fibre glass coil former
  • Very stiff hard paper cone (made in-house)
  • Vented cast aluminium chassis
  • Large vented motor system and vented coil former
  • Long life silver lead wires

Additional information

Nominal Impedance

2 x 3 Ω

DC resistance

Re 2 x 2.5 Ω

Voice coil inductance

Le (par./ser.) 1.4 /6.1 mH

Effective piston area

Sd 458 cm2

Voice coil diameter

75.5 mm

Voice coil height

38 mm

Air gap height

8 mm

Linear coil travel (p-p)

30 mm

Magnetic flux density

0.62 T

Magnet weight

2.4 kg

Net Weight

7.7 kg

Free air resonance

Fs 27.5 Hz


90/85 dB

Mechanical Q-factor

Qms 5.62

Electrical Q-factor

Qes 0.52

Total Q-factor

Qts 0.48

Moving mass incl. air

Mms 231 g

Force factor

Bl 9.7/19.5 Tm

Equivalent volume

Vas 43 liters


Cms 0.14 mm/N

Mechanical loss

Rms 7.1 kg/s

Rated power handling

300 W


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



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