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NEW Fosi Audio CA30 4-Channel Class D Amplifier

Fosi AudioPart # 235-259
Model: CA30

The Fosi Audio CA30 is a compact 4-channel Class D car amplifier designed for flexible system configurations, including stereo operation and bridging. Fosi positions it as bringing its home audio tuning approach into a car audio format, with low distortion, low noise, and a size that fits easily under seats or in other tight installation spaces.

Key Features

  • 4-channel Class D design with stereo and bridged operation for more flexible system layouts
  • 100W x 4 output with 320W x 2 bridged at 4Ω for powering speakers or a subwoofer
  • Infineon IR4322 chip with THD+N ≤0.008% for clean, low-distortion playback
  • Compact 7.3" x 3.9" x 1.7" size for easier installation under seats or in tight spaces
  • Built-in protection circuits and status indicators for safer operation and easier system monitoring
  • CNC aluminum finned heatsink helps keep temperatures down for stable sound during extended listening sessions
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Overview

Fosi Audio CA30 4-Channel Class D Amplifier

Fosi Audio CA30 4-Channel Class D Amplifier

Premium Chipset Infineon IR4322

Backed by eight years of amplifier design experience, Fosi Audio has gained a global reputation for creating compact amplifiers with impressive power and sound quality. The CA30 marks Fosi's first step into car audio, applying our home audio technology and tuning knowledge to deliver a more enjoyable in-car listening experience.

Home Audio Fidelity Reimagined for the Road.

Featuring audio performance that surpasses others in its class for a genuine upgrade in listening enjoyment.

Higher Efficiency and Lower Hear

It outputs 100W per channel into 4Ω, and when bridged, it delivers 320W, making it well suited for a 4Ω subwoofer.

Easily Hidden Under Seats

At just 7.3 x 3.9 x 1.7 inches, it takes up virtually no cabin space.

Born for Most Vehicles

Compatible with vehicles with a 10-16V supply voltage.

Built-In Protection Circuits

Protection against overheating, short circuits, overvoltage and undervoltage, plus reverse polarity safeguards.

Carefree Listening

Includes power, protection, and clipping indicators.

Product Details

4-Channel Car Audio Amplifiers
The Class D 4-channel layout supports both stereo operation and bridged configurations for flexible system design. An Infineon IR4322 chip delivers clean, full-range audio to your vehicle's speakers with low distortion and reduced heat buildup

HiFi Sound Quality
Brings Fosi Audio's home audio engineering into the car audio space. Uses JRC/ST op-amps with THD+N ≤0.008%, SNR ≥100dB, and an ultra-low noise floor ≤200μV for performance that exceeds typical amplifiers in this category

88% High Efficiency & Bridgeable
The Class D design keeps heat low while producing 100W x 4, and bridged mode delivers 320W x 2 @ 4Ω for subwoofer applications. A REM wire allows synced power on/off with your head unit, while the adjustable HPF/LPF crossover spans 50–250 HzSized at 7.3" x 3.9" x 1.7", it fits easily under seats or in other tight spaces. Works with 10–16V DC gasoline vehicles, including sedans, SUVs, trucks, MPVs, Jeeps, and vans for straightforward installation

Compact Universal Fit
Measures 7.3" x 3.9" x 1.7" to fit under seats or tight spaces. Compatible with 10–16V DC gasoline vehicles, including sedans, SUVs, trucks, MPVs, Jeeps, and vans, for easy installation.

Smart Cooling & Protection
A CNC aluminum finned heatsink helps maintain lower temperatures for stable sound during extended use. Built-in protection covers overheating, short circuits, overvoltage, undervoltage, and reverse polarity, while LED indicators provide quick status updates.

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.

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)

What‘s in the box?

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

Product Details

BrandFosi Audio
ModelCA30
Part Number235-259
Unit of MeasureEach
Weight2.85

Product Specifications

Input TypeRCA Line Level-Speaker Level
Output Channels4
RMS Power Output (4 Ohms)100

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