PA40 vs A300
The A300's signal-to-noise is 103 dB against the PA40's 100 dB. Both share power @ 8ω (85W), power @ 4ω (165W), and thd (0.004%).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower Amplifiers
Estimated price (community-sourced)
$139
Around — community and catalog average, updates slowly
About the PA40
The SMSL PA40 is a compact two-channel Class D power amplifier using Infineon’s MA5332MS amplifier chip and JRC’s NJU7391A electronic volume-control chip. It accepts an RCA line-level input and drives passive loudspeakers, delivering up to 165 W per channel into 4 ohms or 85 W per channel into 8 ohms. The amplifier includes a built-in power supply, remote-controlled volume, selectable gain, bass and treble adjustment, and protection functions for abnormal operating conditions.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 85W @ 8Ω
- Power @ 4Ω
- 165W @ 4Ω
- Amplifier Class
- D
- Minimum Impedance
- 4Ω
- Input Sensitivity
- 0.3V RMS
- Input Impedance
- 20Ω
Analog Output
Analog signal output specifications
- THD
- 0.004%
- SNR
- 100 dB
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 191.6 × 41.6 × 185 mm (W × H × D)
- Weight
- 1.26 kg (3 lbs)
Key Specifications
Power: 85W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions