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SB12PACR25-4-COAX

SB Acoustics SB12PACR25-4-COAX 4" Coaxial Speaker

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NEW PRODUCT - UK STOCK ITEM

The SB Acoustics SB12PACR-4-COAX is a 2 way coaxial loudspeaker drive unit featuring a 4" anodised aluminium cone with a 1" centre mounted soft dome tweeter. Extended frequency response, highly dynamic sound.

Crossover designs can be found within the SB Acoustics Technical Notes webpage.

The tweeter is available as a spare part:  SB14ST-C000-4 , it can be adapted to repair various other coaxial speakers that feature a 1" pole piece.

Key Features:

  • Anodised aluminum cone
  • Low damping rubber surround
  • Long stroke linear suspension
  • Light weight CCAW voice coil
  • Non-conducting fibreglass coil former
  • Vented reinforced polymer chassis
  • Compact large surround dome tweeter

Basic parameters (woofer):

Resonant frequency (fs) 55 Hz Nominal impedance (Zn) 4 Ω
Mechanical  Q factor (Qms) 4.84 DC resistance (Re) 3.1 Ω
Electrical Q factor (Qes) 0.38
Max power handling 30 W
Total Q factor (Qts) 0.35
Sensitivity (2.83V/1m)
87.5dB
Equivalent volume (Vas) 4.3L Chassis diameter
122mm

Here's the full datasheet:

.pdf link

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