AD4215 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: AD4215 D2 Categories: ,


The 4000 series 15 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 32.270 Hz
Qms 5.779
Vas 43.730 liters
Cms 0.051 mm/N
Mms 471.000 g
Rms 16.705 kg/s
Dia 314.400 mm
Sd 776.345 sq cm

Qes 0.527
Re 4.298 ohms
Le 2.738 mH
Z 5.158 ohms
BL 27.897 Tm
BL^2/Re 181.075 N^2/W

Qts 0.483
no 0.269 %
SPL 86.439 dB
EBP 61.187

Xmax 23.5 mm

Nominal Diameter 15in
Overall Diameter in / mm
Mounting Hole Diameter 14.17in / 359.92mm
Bolt Hole Circle Diameter
Motor Outer Diameter 7.72 in / 196 mm
Mounting Depth in / mm
Required Pole Vent Clearance
Driver Displacement 0.157 cu ft / 4.47 l

Minimum Sealed Volume N/A
Minimum Vented Volume  1.82 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.

The above design has been engineered for a mid-size SUV only.