AD4212 D2


  • 500W – 1,500W optimal power range
  • 3 inch voice coil
  • Triple stack 225oz motor
  • 23.5mm Xmax
  • Double high current tinsel leads
  • Nomex spider
  • Designed for use in small vented enclosures.
  • Engineered in the USA.
SKU: AD4212 D2 Categories: ,


The 4000 series 12 employs a finely-tuned balance of damping and extensive motor force to achieve very high efficiency, offering exceptional versatility and unmatched performance in a variety of real-world functions.

Fs 29.980 Hz
Qms 5.479
Vas 20.310 liters
Cms 0.066 mm/N
Mms 419.300 g
Rms 14.573 kg/s
Dia 243.000 mm
Sd 463.770 sq cm

Qes 0.429
Re 4.231 ohms
Le 2.814 mH
Z 5.077 ohms
BL 27.904 Tm
BL^2/Re 184.025 N^2/W

Qts 0.398
no 0.123 %
SPL 83.044 dB
EBP 69.851

Xmax 23.5 mm

Nominal Diameter 12in
Overall Diameter 12.60in / 320mm
Mounting Hole Diameter 11.12in / 282.5mm
Bolt Hole Circle Diameter
Motor Outer Diameter 7.72in / 196mm
Mounting Depth 7.64in / 194mm
Required Pole Vent Clearance
Driver Displacement 0.114 cu ft / 3.24 l

Minimum Sealed Volume N/A
Minimum Vented Volume 1.30 cu ft / l net*

* Tune for desired response

The above designs have been engineered for a “two tier” balance of compatibility: First, between the cabin acoustics of a sedan, hatchback and an SUV, and second, between the two available voice coil configurations, for a total of six balance points. This ensures a linear response and optimal power handling for listening purposes under most circumstances. Please visit our Enclosure Design Service page for custom designs.