No it means that it wasn't a room issue in the first place and at least one of the cables is not fit for the purpose and measures appallingly.
Yes EQ is treating the room, although you could argue that in the case of bass resonances as you describe, it is screwing up the direct signal and not preventing the slow build up of bass energy at the problem frequencies. It's not ideal but you will hear it.
No once again, if that affects the bass, the issue had nothing to do with the room in the first place and one amplifier is operating outside of it's capabilities.
Impossible to say as we don't know whether you've got a room issue, dodgy cables or a farked amplifier. The new room will sound substantially different though - although the main modes will remain the same.
Yes it does matter as claiming the cable is taming the room is up there with seeing Elvis at Marylebone station and being abducted by aliens whilst walking your pet pekinese in Hyde Park.
This was all meant as a little tounge in cheek with some actual debate thrown in. But to be honest do some amps not control drivers better than others? and do some cables not show a difficult load to the amp (ala early Naim amps and fancy cable).
Plenty of people have had very good amps with very good speakers and blamed one or the other as having poor performance due to inconsistencies in bass or whatever. For instance the Nad C270 power amp has more watts than the Classe CA-100, yet the difference in bass performance with certain speakers is night and day! This does not mean the amp or speaker is to blame, but more a case of synergy is it not?
( I am sure some speakers do not respond well to high current designs with too much control?)
A technics SU-MA10 driving Kef 107 via Van Den Hul D-352 will clip quite alarmingly at modest volume during content with low low frequencies, but this is aleviated slightly with Nac5, the amp seeming to be less ditressed at the same volume setting. This I assume IS due to LCR and cable construction though.
I guess this is not a case of appaling cable, but one being more suited than the other to the task and system?
To be honest I thought the room taming cable lark was read into a little too much, I know I myself have a way of saying the wrong thing the wrong way.
As for room issues, I myself do have some, my previous room being quite large and of concrete and plaster construction, is now replaced with a smaller L shaped plaster board affair with suspended floors. To be honest I think cheaper electronics gave a better performance for the money in my previous room, than my better electronics with the same speakers in my current room. I was certainly less bothered about cables and supporting electronics back then, and didn't seem to need as much volume.
Anyway I do not want to be one either side of the fence, but maybe in the middle, my claims of hearing cable differences are probably more to do with the cables being of different construction. And I have to many systems and kit which I regulary swap around to be bothered too much about being correct in any thread discussion, as tommorow I may say the oposite ot change my mind?
Edit, I think my cables, amplifiers and speakers are fine, though not to everyones taste.