Originally Posted by
Loren42
I don't know how the cabinet is made, but if the 2202 and the 2245 share the same internal volume you will change the cabinet resonance tuning by doing what you recommend in two ways:
1) The displacement volume of the 2202 will be removed from the cabinet and essentially increase the total internal volume by that amount.
2) The 2202 and 2245 were designed to share the volume in the cabinet and ports, so there will be some loss of the coordinated intended volume and probably the tuning of the ports.
Neither problem is difficult to overcome, you just need to reduce the internal volume by adding panels or some object internally (bags of play sand) to retune the cabinet volume. You may also need to adjust the ports, but I would start by sweeping a signal into the cabinet and looking for the resonance point with the driver you intend to put in mounted in the cabinet and the unused drivers' openings plugged.
I don't know how much of an impact not compensating will really make, but from an academic point of view it is a real argument. If you can do an impedance test before the original drivers are removed you will have a baseline for the original resonance point, but it sounds like that may not be possible.
If the 2202 and 2245 do not share the same volume, then it does not make a difference.