SB Acoustics SB12MNRX2-25-4 4'' Midrange

SB Acoustics

SB Acoustics SB12MNRX2-25-4 4'' Midrange

  • Proprietary cone material with natural fibres made in-house
  • Shortened voice coil optimized for pure midrange reproduction
  • 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
  • Shorting ring in motor system for reduced distortion
Product Specifications
Nominal Impedance 4 ohms
DC resistence,Re 3.2 ohms
voice coil inductance,Le 0.15 mH
Free air resonance,Fs 63.5 Hz
Sensitivity(2.83V/1m) 90.5 dB
Mechanical Q-factor,Qms 4.19
Electrical Q-factor,Qes 0.35
Total Q-factor,Qts 0.32
Moving mass incl. air,Mms 4.2 g
Force factor,BI 3.9 Tm
Equivalent volume,Vas 5.3 liters
Compliance,Cms 1.5 mm/N
Mechanical loss,Rms 0.4 Kg/s
Rated power handling* 50W
Effective piston area,Sd 50 cm²
Voice coil diameter 25.4 mm
Voice coil height 9.4 mm
Air gap height 5 mm
Linear coil travel(p-p) 4.4 mm
Magnetic flux density 1.03 T
Magnetic weight 0.4 Kg
Net weight 0.92 Kg

Frequency and Impedance Graph:

SB Acoustics SB12MNRX2-25-4 4'' Midrange

Drawing:

SB Acoustics SB12MNRX2-25-4 4'' Midrange drawings