Is it possible to “refit” the center in the middle ventilation grid? Have the Concert 2 without Bose and the Rainbow in the doors (still without power stage), the HT are installed in the original places in the door, doors are (now) insulated. Does it bring a tonal improvement if I retrofit a center speaker in the middle ventilation grid? If so what kind of center (original or any other) and how do I connect the thing? Can I just paralel the new center at the Ra Dio output (e.g., front right) clamp in front of the crossover? After the crossover I did not want to jam the part, since I would have to return new cables from the door. Tulura