Get a second T/9x. It does exactly what @ghdprentice says. Soundstage extends in all directions and imaging improves. I’m not aware of software for setting up a REL. Neither of my T/5xes came with software, but they do have good videos on setup and integration. My pair was relatively easy to get sorted.
Yet another Sub Question
Got a T/9x was considering adding another. But I think a remember reading on here someone saying they auditioned a Single S/510 vs 2 9x and chose a Single S/510. Seems like people always say 2 better than one even if you have to go smaller but....?
Feedback appreciated:
Room: 12 X 26
Current Tower Speaker specs
| Sensitivity (1W @ 1m) | 90db |
| Frequency response (+/-3dB) | 47Hz - 20kHz |
| Bass extension (-6dB) | 40Hz |
| Crossover frequency | 300Hz & 3.5kHz |