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The H154 HEX Series 15-inch subwoofer from Diamond Audio is engineered for enthusiasts who demand extreme output, precision control, and long-term reliability. Drawing heavily from the advanced technologies found in the HEX PRO Series, the H154 delivers powerful, musical bass with exceptional thermal management and durability.
At the foundation is a rigid cast aluminum basket paired with a solid-core aluminum radial heat sink, designed to rapidly dissipate heat during high-power operation. A massive 3-inch high-temperature dual voice coil, wound on a treated high-strength aluminum former, ensures consistent performance under extreme load while minimizing power compression. The dual 4-ohm voice coil configuration provides flexible wiring options for a wide range of amplifier setups.
The HEX Series features an exotic fiber weave cone reinforced with a specially treated paper backing, delivering fast transient response and accurate low-frequency reproduction. This combination allows the H154 to produce deep, authoritative bass with exceptional clarity across multiple music genres.
Built for high-output systems and extended listening sessions, the H154 offers world-class sound quality, rugged construction, and lasting performance. Upgrade your system with the HEX Series and experience uncompromising bass precision and power.
Mounting Diameter: 13.9 " / 353mm Mounting Depth: 7.8 " / 200mm Tech Support:
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.

