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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.
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.








