SB12NRX25-8 4'' Midrange Woofer

The SB Acoustics SB12NRX25-8 4" Midwoofer is an excellent SB Acoustics Ferrite magnet midrange/midwoofer, featuring a high efficiency low damping rubber surround. Fitted with a proprietary composition paper cone, 1" voice coil.
59,95 €
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Highlights

  • Proprietary cone material with natural fibres made in-house
  • High damping Butyl rubber surround for non-resonant sound character
  • Vented pole piece for reduced compression
  • Vented cast aluminium chassis for optimum strength and low compression
  • CCAW voice coil for reduced moving mass
  • Long life silver lead wires
  • Non-conducting fibre glass coil former for minimum damping

 

Product details

SB Acoustics SB12NRX25-8 4'' Midrange Woofer

 

The SB Acoustics SB12NRX25-8 4" Midwoofer is an excellent SB Acoustics Ferrite magnet midrange/midwoofer, featuring a high efficiency low damping rubber surround. Fitted with a proprietary composition paper cone, 1" voice coil. Very open cast frame for minimal reflections. Fs 55Hz, good level extended response up to 5KHz.

SISB12NRX258

Data sheet

Impedance
8 Ohm
Driver type
Midwoofer
Sensitivity
85.5 dB 2.83V/1m
Resonance frequency (fs)
57 Hz
DC resistance (Re)
6.4 ohms
Mechanical Q (Qms)
4.1
Electrical Q at Fs (Qes)
0.41
Total Q factor (Qts)
0.37
Speaker diameter
4"
Voice coil inductance (L)
0.34 mH
Effective mechanical mass incl air load (mms)
5.2 g
Effective piston radiating area (Sd)
50 cm2
Force factor (BL)
5.4 Tm
Equivalent volume of compliance (Vas)
0.18 ft.³