Feature

1. HiFi-Grade Sound, Redefining Car Audio

Fosi Audio brings 8 years of home audio expertise to your vehicle with professional-grade specs: ≤200μV noise floor and ≤0.008% THD. Transform your car into a mobile concert hall where every note comes through crystal clear and emotionally engaging.

2. Ultra-Compact Design, Effortless Hidden Installation

Measuring just 186×101×44.2mm, it fits easily under seats or in the glove compartment. The all-aluminum unibody with linear heat sinks ensures stable performance without sacrificing precious cabin space.

3. 88% Ultra-High Efficiency, Cool & Powerful

Powered by Infineon IR4322 Class D amplifier chip with 88% efficiency for minimal heat generation. Delivers 100W×4 at 4Ω or 320W×2 in bridged mode—small size, massive power to drive any speaker configuration.

4. Intelligent Protection for Worry-Free Driving

Smart LED indicators monitor status: red for overheat protection, no light for short circuit, orange when clipping exceeds 1%. Built-in delay mute circuit eliminates turn-on/off pops, with REM interface for seamless head unit synchronization.

5. Universal 99% Vehicle Compatibility

Wide 10-16V power range supports both gas and electric vehicles. Four independent channels flexibly handle 2-8Ω mid/tweeters and 4Ω subwoofers, meeting all your customization needs.

Specifications

Amplifier chip：Infineon IR4322
Op-amps：JRC NJM4580E/ ST TJM4558CDT
RMS Power@4Ω 100Wx4
RMS Power@2Ω 160Wx4
Bridge Power@4Ω：320Wx2
Frequency Response：10Hz-40kHz
Low Pass Frequency Crossover：50Hz-250Hz
High Pass Frequency Crossover：50Hz-250Hz
Power/Protection Indicator Blue / Red
Clipping Indicator Yellow
Damping Coefficient (100Hz @10W) ≥140
Input Sensitivity：0.75 – 8V
Interference@1kHz：≥60dB
SNR：>100dB
SINAD：≥80dB
Remaining Noise ≤200μV
THD@5W：≤ 0.008%
Fuse：30A×2 (Internal)

Installation Notes

1. The high-level input supports automatic power on/off. When using a high-level input with DC, the REM connection is not required.

2. For dual protection, please install a 60A external fuse on the power cable within 50 cm of the vehicle battery.

3. To minimize interference, route power cables and signal cables on opposite sides of the vehicle (e.g., signal cables on the left, power cables on the right).

4. Please use properly rated cables. Power and ground cables must be AWG #4, and the REM wire should be AWG #16 to #18.

5. Do not connect high-level input and RCA low-level input simultaneously.

6. Multiple speakers can be connected in parallel to a single channel. In stereo mode, total impedance per channel must not be lower than 2 Ω; in bridged mode, not lower than 4 Ω.

7. Observe correct polarity for all power and audio connections to prevent short circuits or damage to the amplifier and vehicle.

8. The CA30 features cooling fins on the top panel. For optimal cooling, please install the amplifier with the fins facing upward, maintain 5–10 cm of clearance, and do not cover the fins during operation.

What‘s in the box？

Fosi Audio CA30*1
User Manual
Screws
30A Fuse*2
8-pin Ribbon Cable
Wrenches