S.M.S.L SMSL DA100 Digital Amplifier

S.M.S.L DA100 Power Amplifier.
This is a current model that just launched on Amazon in December of last year.
I am selling one of two units I purchased in February for speaker comparison purposes. (One of the two systems has been upgraded to a dedicated DAC + power amplifier.)
There are no operational issues whatsoever. It was only used for 2-3 hours of listening comparison on weekends.

The unit was used in an environment with 24-hour temperature and humidity control, managed by air conditioning and a smart remote control, even when I was away.
It comes from a non-smoking, pet-free home.

The original box and all accessories are included.
In the photo of all accessories, the remote control, HDMI cable, and USB-C to USB-A cable placed in the upper half are unused (as the remote control was shared with the other unit).
The condition and appearance are excellent with no signs of use.
(There are faint line marks on the protective film of the front panel from being wiped with a soft cloth for listing. Please rest assured that these are on the film, not the main unit. While it may not be immediately apparent that the protective film is still on, I have confirmed its presence on the other unit which is not being sold.)

*Please note that I will be away from May 2nd to May 7th and will be unable to ship during this period.

I have summarized the advantages of this model over others using AI below. Please use this as a reference for your purchase. Thank you.


• HDMI (ARC) Connection: Allows you to control the amplifier's volume in conjunction with your TV remote.
• Optical Digital Connection: Allows for independent volume control on the amplifier without syncing with the TV.


Equipped with detailed filter settings (high-pass/low-pass) and phase switching. Allows for precise synchronization of bass with main speakers.

• Eliminates the scratchy noise and left-right volume imbalance (gang error) characteristic of analog volume controls.

• Features 6 preset modes including Direct/Rock/Soft, allowing you to switch to your preferred sound quality with a single touch.

• Improved connection stability
• Enhanced features for avoiding radio interference, significantly reducing audio dropouts even in environments with many Wi-Fi devices.
• Low-latency listening
• Optimized data transfer efficiency improves audio lag (delay) during video viewing and gaming.