Polish
Customized Amplifier Board Solution for a Korean Car Audio Brand
Industry: Automotive Aftermarket Car Audio | Region: South Korea | Solution: Custom Class-D Amplifier Board (OEM)
Project Background
A growing car audio brand based in South Korea approached us with a familiar but demanding challenge. Its existing aftermarket amplifier modules could not deliver enough clean output power inside the tight space of modern vehicle dashboards, and its previous supplier had become unreliable on both quality and lead time. The brand needed a compact, high-efficiency amplifier board that could be dropped into its own finished products and carry its own branding — a true OEM-style partnership rather than a simple component purchase.
The Challenge
The customer's requirements were specific and non-negotiable:
- Continuous output of 4 x 80 W into 4 ohms with low total harmonic distortion (THD)
- A compact footprint able to fit a standard double-DIN mounting bay
- Support for both 12 V and 24 V vehicle electrical systems
- Reliable protection against over-current, over-temperature, and short-circuit conditions
- Full white-label capability, including customized PCB silkscreen and connector layout
Our Solution
Our engineering team designed a customized Class-D amplifier board built around a high-efficiency topology. The result delivered more than 90 percent power efficiency while keeping heat generation low enough to avoid an active cooling fan — a critical advantage for the customer's fanless enclosure design.
Key features of the delivered module included:
- Class-D architecture for high efficiency and a reduced thermal load
- Wide input voltage range covering both 12 V and 24 V systems
- Integrated protection circuitry for over-current, over-temperature, and short-circuit events
- Customized connector placement and PCB silkscreen for seamless OEM integration
- Compact board dimensions that fit the customer's existing enclosure without redesign
Specifications at a Glance
| Parameter | Specification |
|---|---|
| Output Power | 4 x 80 W (4 ohms, continuous) |
| Efficiency | > 90% (Class-D) |
| Input Voltage | 12 V / 24 V DC compatible |
| Protection | Over-current, over-temperature, short-circuit |
| Cooling | Passive (fanless design) |
| Customization | PCB silkscreen, connector layout, branding |
Results and Value Delivered
Within a short development cycle, we moved from initial samples to stable mass production for the customer. The delivered amplifier board helped the brand achieve:
- Higher, cleaner output power within the same enclosure footprint
- Improved thermal performance, removing the need for active cooling
- A shortened and more predictable supply lead time compared with the previous supplier
- A fully branded, OEM-ready module that strengthened their own product positioning
The customer has since expanded the range of models that use our amplifier platform, confirming the value of a flexible, engineering-led partnership.
Conclusion
This project reflects our core approach: understanding each customer's real constraints — space, heat, power, and branding — and delivering a customized amplifier board that fits precisely. Whether you are a car audio brand, a system integrator, or an OEM manufacturer, we can tailor an amplifier solution to your product goals.