I listened to the Ascilab F6B in the living room and tried room correction in both rooms.
Beforehand, I compared frequency response of the Revel M105, the Ascilab F6B, and the DIY speakers (Speaker 1), which are currently in use in my workroom. They were located on my desktop in my small workroom. Looking at the low frequencies from 50Hz to 120Hz (purple box), the frequency response of the M105 (blue) and F6B (red) is very similar. On the other hand, inserting a port plug into the M105's bass reflection port (purple) brings it very close to Speaker 1 (green). The M105 has a port on the back, while Speaker 1 has a port on the front. This demonstrates the effect of the port plugs when speakers are close to walls. If there isn't enough space between the speakers and the wall - as is often the case with desktops - the F6Bs might be a better choice than the F6B.
Of course, you can also use an EQ to reduce the over-aggressive bass. I first tried it with RoomFit, the room correction feature of the WiiM Pro Plus. I used the RoomFit settings as default and the miniDSP UMIK-1 as an external microphone. It reduces peaks and makes it easier to listen. It does not seem to correct dips. Starting with version 4.8.726047 of the WiiM Pro Plus, RoomFit and PEQ work together, so you can use PEQ to fine-tune the RoomFit room correction.
Next, I created EQ filters in REW and entered them into the PEQ settings on the WiiM Pro Plus. Depending on the settings, REW seems to correct FR more significantly than RoomFit. However, both RoomFit and REW worked fine.
Lastly, I listened to the F6B in the living room. The left speaker is located at the corner of the room. It is 0.5 m to the back wall and 0.4 m to the left wall. The left channel therefore has a bass boost which is probably due to reflections from the corner of the room. In the living room, however, there is not as big a standing wave effect as in the workroom, so I could listen to the music without EQ. Nevertheless, to reduce the bass boost in the left channel, I corrected it with the R/N1000A Network Receiver's built-in room correction YPAO (Yamaha Parametric room Acoustic Optimizer). I don't like the way YPAO boosted the sub-bass, but it did reduce reflections from the corners of the room. The F6B sounds very nice, just like the IEM, which almost complies with the target curve. With REW and PEQ it could be more complete.
Below is the same graph but with psychoacoustic smoothing.
I will use the Ascilab F6B in my living room and the Revel M105 with port plugs in my workroom.
Hope these measurements help.
