A total of 2 reviews of this product on Reddit.
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I give my two cents since I own a pair (of the speakers).
To make a comparable speaker now given its diminutive size and performance would be far too expensive to make a profit from now — outside of a nich markets not geared to the average consumer, but audiophiles willing to pay a premium.
That said, after moving my M-7’s from my desktop to the dining/kitchen area because I couldn’t find a decent wall-mounted small speaker for a reasonable cost, I replaced my M-7’s with an inexpensive obscure brand of Chinese speakers called Singing Wood. Someone did a review on the self powered version and said they were pretty good so I took a chance on the passive ones. Much to my surprise they sound pretty good. And they were an acceptable size for my desktop — smaller than Miccas but with a 4″ woofer and 3/4″ tweeter.
https://www.amazon.com/T25-Bookshelf-preinstalled-Amplifier-Wood-Pair/dp/B08CD39LZR
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I have a little ORB amp with optical input and sub out that serves me well. But if I were to replace it, I’d probably get one of these. Fosi Audio DA2120A
https://fosiaudio.com/collections/2-1-channel-amplifier/products/fosi-audio-da2120a-bluetooth-amplifier-stereo-receiver-2-channel-audio-wireless-amp-dac-spdif-hi-fi-compact-mini-integrated-class-d-power-amp-for-home-speakers-active-subwoofer-with-remote-control
As far as smallish passive speakers go, these sound surprising good and they’re very inexpensive. Just the right size for desktop. Singing Wood T25 Passive 2 Way Bookshelf Speakers
https://www.amazon.com/T25-Bookshelf-preinstalled-Amplifier-Wood-Pair/dp/B08CD39LZR
I’d think the Dayton sub would be fine for under a desk. I use an inexpensive Monoprice 8″ sub and it’s perfect.
One thing I discovered recently: I tried out a USB to optical converter to feed the optical input on my little ORB amp, and it improved the sound immensly. Previously I had used a USB to analog DAC. Seems like whenever I use optical input over other methods the results are always better. That said, I’m also using one of these.
Signstek HiFi USB to Coaxial S/PDIF Converter (currently out of stock, but no doubt there are other options)