12″ SB34NRXL75-8 / Norex


  • Hard paper cone for improved piston operation (made in-house)
  • Large motor system with under-cut pole piece and dual shorting rings
  • Vented pole piece for minimum compression
  • Vented cast aluminium chassis for optimum strength and low compression
  • 3″ copper voice coil for improved power handling
  • Long life silver lead wires
  • Low damping rubber surround for improved dynamic linearity
  • Non-conducting fibre glass voice coil former for minimum damping
  • Optimized for vented enclosure
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Additional information

Nominal Impedance

8 Ω

DC resistance

Re 6.2 Ω

Voice coil inductance

Le 1.2 mH

Effective piston area

Sd 508 cm2

Voice coil diameter

75.6 mm

Voice coil height

28 mm

Air gap height

8 mm

Linear coil travel (p-p)

20 mm

Magnetic flux density

1.1 T

Magnet weight

3.6 kg

Net Weight

8.9 kg

Free air resonance

Fs 22 Hz


(2.83V/1m) 91 dB

Mechanical Q-factor

Qms 5.5

Electrical Q-factor

Qes 0.29

Total Q-factor

Qts 0.28

Moving mass incl. air

Mms 93 g

Force factor

Bl 16.6 Tm

Equivalent volume

Vas 205 liters


Cms 0.56 mm/N

Mechanical loss

Rms 2.35 kg/s

Rated power handling

200 W


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



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