SMSL AS400 - All-in-One Integrated Amp for $279
18.08.2025 07:59 | ~1 minute read
SMSL has introduced all-in-one integrated amplifier SMSL AS400. This is a universal audio machine for only $279 with powerful DAC, MM phonostage, stereo preamplifier, headphone amplifier and a powerful power amplifier. Housed in a compact case (210×46×254 mm), the amp can be used in a table-top systems.
The Cirrus Logic CS43131 chip is responsible for the sound quality. The built-in USB interface is built on the XMOS XU-316 circuit. The power amplifier based on Infineon MA5332MS modules offers 2 × 85 W at 8 Ohm load or 2 × 165 W at 4 Ohm. There is a volume control based on modern on the NJW1194A (JRC) chip.
The device is equipped with a monochrome display, 6.35 mm and 4.4 mm headphone outputs, and a subwoofer output. Digital inputs include HDMI ARC, USB-C, SPDIF (RCA) and optical Toslink. There is Bluetooth with support for SBC, AAC, aptX HD and LDAC codecs for wireless audio.
Specifications
This product is in the Hi-Fi and High End Electronics and Acoustics database
Integrated amplifiers — SMSL AS400
Model name
AS400
Type
integrated amplifier with DAC and phonostage
Analog inputs (balanced)
N/A
Analog inputs (single-ended)
N/A
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
N/A
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
D/A conversion
N/A
Phono MM/MC current-sensing input impedance (Ω)
N/A
Output power (8Ω) (W)
2 x 85
Output power (4Ω) (W)
2 x 165
Gain (dBu)
N/A
Frequency response low +/- 3dB (Hz)
N/A
Frequency response high +/- 3dB (Hz)
N/A
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (%)
0.003
Damping factor
N/A
Dimensions (mm)
210 × 46 × 254
Weight (kg)
1.56
Official link
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