SMSL AL400 Integrated Amplifier 2.1

 299,00 Incl. Vat

✅ 2 years standard warranty

✅ Free return within 14 days

✅ Orders before 17:00 → shipped today

❌ Out of stock

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Description
The SMSL AL400 is an integrated amplifier and DAC featuring high-performance architecture based on a TPA3255 amplifier chip and a Cirrus Logic CS43131 converter. It combines 2x165W power output into 4Ω with high-resolution 32bit 768kHz decoding, native DSD256, and full MQA support. Equipped with a parametric equaliser and dedicated subwoofer control, it is suitable for both stereo and 2.1 configurations. Its wide range of connections, including HDMI eARC, MM/MC phono input and high-resolution Bluetooth, make it a versatile control centre for your entire audio system.  

SMSL AL400: Cirrus Logic DAC and XMOS interface

The DAC section of the AL400 is based on a Cirrus Logic CS43131 chip combined with an XMOS XU-316 USB processor. This combination supports files up to 32bit 768kHz PCM and DSD256. In addition, the AL400 also features full MQA and MQA-CD decoding, allowing you to enjoy your music regardless of format.

SMSL AL400: 2x165W amplification

The AL400 incorporates a TPA3255 Class D amplifier chip, delivering 2x165W under 4Ω while maintaining a THD+N of 0.03%. Volume control is based on a Japanese-made ROHM BD37524FS-E circuit, an electronic process that ensures precise adjustment across the entire dynamic range without any measurable signal degradation. This solution limits the introduction of noise and distortion, even at low listening levels, unlike conventional mechanical potentiometers, which can cause channel imbalance and gradual deterioration.

SMSL AL400: Dedicated subwoofer output

dedicated subwoofer output allows for a 2.1 configuration with independent volume control from the main level. The AL400 offers four selectable low-pass cutoff frequencies (55Hz, 85Hz, 120Hz, 160Hz), allowing you to adjust the crossover point between the main speakers and the subwoofer according to their respective bass extension. A phase inverter offers a choice between 0° and 180°, a correction that is sometimes necessary to align the subwoofer's output with that of the speakers, particularly when their spatial positioning generates unwanted cancellations or reinforcements in the lower end of the spectrum.

SMSL AL400: A full range of connectors

The AL400's connectivity covers all common digital and analogue sources. The HDMI eARC input allows volume control and automatic power-up via CEC protocol, the USB input uses the XMOS XU-316 processor to handle 32-bit/768kHz and DSD256 streams, and coaxial and optical inputs complete the digital options.

On the analogue side, a built-in phono preamplifier allows direct connection of a turntable equipped with MM (Moving Magnet) or MC (Moving Coil) cartridges, eliminating the need for an external preamplifier. An RCA line input handles other analogue sources.

Finally, the Bluetooth section supports LDAC, aptX Adaptive, aptX HD, AAC and SBC codecs, ensuring high-quality sound reproduction even when connected wirelessly.

SMSL AL400: Multi-band equaliser

The AL400 features a multi-band equaliser that allows independent adjustment of treble, midrange and bass frequencies. Each frequency band has a gain control for targeted amplification or attenuation, as well as a Q control that defines the bandwidth affected by the correction. This module thus offers you acoustic correction that can be adapted to the characteristics of the listening room or the specific response of the speakers used, without the need for external equipment or additional software processing.

Specifications
Product typeIntegrated amplifier
DAC
Amplification typeClass D
Inputs1x Stereo RCA
1x USB-C
1x Coaxial
1x Optical Toslink
1x Phono
1x HDMI eARC
Bluetooth
OutputsSpeaker terminals
1x Subwoofer
Total harmonic distortion more noise (THD+N)0.003%
Signal-to-noise ratio (SNR)101dB
Channel separation100dB
Input sensitivity / Input impedance560mV / 22kΩ
RMS output power2x165W @ 4Ω
2x85W @ 8Ω
USB transmissionAsynchronous
USB compatibilityWindows 7/8/8.1/9/10/11
Mac OSx
Linux
MQA decoderUSB
Coaxial
OpticalToslink
MQA-CD decoderCoaxial
Optical Toslink
Supported sampling ratesUSB : PCM up to 32bit 768kHz, native DSD up to DSD256
Coaxial / Optical : PCM up to 24bit 192kHz, DSD64 (DoP)
General
Power supply voltage100-240V AC
Consumption40W
Dimensions254 x 45 x 210mm
Weight1.7kg
ColorSilver
Package1x SMSL AL400
1x Remote control
1x USB-A to USB-C cable
1x HDMI cable
1x Power cable
Additional information
Color
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