Mw_chen,
With all due respect, how do you know there is "absolutely no sonic effect"? If the cabinet is cracked, the joint must have moved, and pressure inside the unit may be compromised. I don't believe your cabinets are sealed, but if this were a sealed design, I would expect some sonic change. I don't know about a ported design.
If it was not cracked when you bought it, and it is now cracked, then I gather you didn't notice a change. That doesn't mean there is no sonic effect, just that you can't hear it. The perception of an effect, real or not, is enough to effect the resale value. I certainly don't know, but I would consider the possibility that the issue is not just cosmetic. The forces in these enclosures can be huge. I suppose that is why it cracked in the first place.
With all due respect, how do you know there is "absolutely no sonic effect"? If the cabinet is cracked, the joint must have moved, and pressure inside the unit may be compromised. I don't believe your cabinets are sealed, but if this were a sealed design, I would expect some sonic change. I don't know about a ported design.
If it was not cracked when you bought it, and it is now cracked, then I gather you didn't notice a change. That doesn't mean there is no sonic effect, just that you can't hear it. The perception of an effect, real or not, is enough to effect the resale value. I certainly don't know, but I would consider the possibility that the issue is not just cosmetic. The forces in these enclosures can be huge. I suppose that is why it cracked in the first place.