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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 32.540 Hz
Qms 5.375
Vas 44.870 liters
Cms 0.052 mm/N
Mms 451.400 g
Rms 17.359 kg/s
Dia 314.400 mm
Sd 776.345 sq cm
Qes 0.546
Re 7.432 ohms
Le 3.961 mH
Z 8.918 ohms
BL 35.430 Tm
BL^2/Re 168.907 N^2/W
Qts 0.496
no 0.273 %
SPL 86.506 dB
EBP 59.553
Xmax 23.5 mm
Nominal Diameter 15in
Overall Diameter 15.6in / 396mm
Mounting Hole Diameter 14.12in / 358.65mm
Motor Outer Diameter 7.72in / 196mm
Mounting Depth 895in / 227.5mm
Driver Displacement 0.157 cu ft / 4.47 l
Minimum Sealed Volume N/A
Minimum Vented Volume 1.65 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.
Most products ship directly from our vendor warehouses or distributor network. Shipping times can vary depending on the brand, product size, availability, and destination.
Large or oversized items such as lift kits, wheels, tires, bumpers, exhaust systems, and audio enclosures may require additional handling time or freight shipping.
If there is ever an issue with availability, shipping cost, or delivery timing, we will contact you before moving forward with the order.
Returns may be accepted on most new, unused, unopened items within 30 days of delivery. Items must be in original packaging and in resellable condition.
Installed, used, damaged, missing-parts, electrical, special-order, clearance, or custom-built items may not be eligible for return.
Return shipping is normally the customer’s responsibility unless the return is due to our mistake, such as the wrong item being shipped.
Before sending anything back, please contact Kaos Offroad so we can review the order and provide return instructions. Returns sent without approval may be refused.
Some products are vehicle-specific. Please verify fitment before ordering. If you are unsure, contact us with your year, make, model, sub-model, and any relevant details before purchasing.
Original shipping charges, freight charges, and vendor restocking fees may be non-refundable depending on the item and supplier policy.












