@allenJo - One thing that I look for in a mini stereo amplifier is simplicity of design and yet powerful signal boosting strength. The fact is that I’m not a sound engineer.
I don’t have the time to mess with a whole bunch of sliders and knobs to tweak a system and get just the kind of sound that I need. I’ve found some easy to use amplifiers however that even I can understand and yet deliver professional quality results.
You can often find these systems by reading online stereo amplifier reviews. You can find budget models that will deliver good performance over the long haul.