It took a long time to upload due to personal busy work.
I invited my audiophile friends, sound engineers, and musicians to listen together.
After listening to several songs alternately, what everyone heard agrees on is that the RTM10 outperforms the 8351B when it comes to bass!
Many are amazed by the deep bass that emanates from the RTM10 alone.
Personally, through several experiences (kii 3, d&d 8c, buchardt a500), the bass of an active speaker tuned to a closed type dsp had a distrustful preconceived notion.
This is because it was difficult to feel a really clean deep bass sound due to the high distortion rate when a small box or small unit was put in and the bass output was raised with dsp.
However, the bass of the RTM10 is very clean and does not cause noise even at high output.
This actually felt deeper in the sub bass when compared to the 8351B.
(I think this is due to the relatively low high-order distortion, apart from the 20~30Hz reproducibility.)
In addition, one of the advantages of the sealed type was the fast group delay, which allowed us to hear a tighter bass.
There was a very clear tonal difference in the midrange and treble.
The 8351B had a sharp, very clean impression and a lot of air.
I've been listening to the 8351B for a long time, so when I first listened to the RTM10 I felt that the air was relatively little. (I'm not saying it's dull, it's keeping sharp enough)
However, after listening to the RTM10 for a long period of time, the high frequency without fatigue became a big advantage.
The 8351B's treble was amazing to feel the stimulus while feeling a sharp attack for a short time, but I felt relatively tired from listening for a long time, especially! When I enjoy my spare time after a day of physical exhaustion after work, the tonal features of the RTM10 were especially attractive.
Musicians and audiophile friends prefered RTM10 more in this respect,
While my friends of engineers who do sound production prefered the 8351B.
Also, the interesting thing was in the phantom image.
This is a subjective experience, but in most cases, the phantom center is blurred or obscured when the speaker is placed wider than 60 degrees.
However, when I moved the RTM10 to the outside of the 8351B and listened to it, I could feel that a very accurate phantom center image was maintained without such blurring.
I think this may be due to the wide horizontal radiation width of the RTM10.
The treble's tone from the mid-range is slightly warmer than the 8351B, but it does not miss the detailed transient response to vocals and instruments.
Compared to the 8351B, male vocals such as Sam Smith and female vocals such as Suzanne Vega were able to feel a warm and stable tone without harsh feeling at air band.
the RTM10's midrange gives a rich impression while maintaining neutrality.
When listening to a classical piano, I was particularly fascinated by the rich tone.
I was able to handle songs that had to have excellent reproducibility, such as Zedd's Addicted to a Memory, and played great with songs that needed a very strong sub-response, such as Limit to your love.
The 8351B is undoubtedly a reference speaker, but if you want a more musical and rich tone than an analytic feel, I felt the RTM10 would also be a powerfully considered speaker as an all in one full-range speaker.