how are you with a soldering iron, Ibanez? if you don't have one, they're fairly cheap and pretty easy to learn to use. i feel that once you have that down, it's not all that difficult to redo an Infinity Quantum crossover. what's nice about the big Quantum variety is that you can pretty easily detach the black plastic mounting board visible at the back (it's held by staples and a rubbery sealant) and then unscrew the wooden mounting board in the inside bottom of the cabinet - both of those pieces will be connected and pull right out of the woofer hole after you unplug/cut the wires heading from the crossover up to the drivers. you do need more than a passing ability to read circuit diagrams and translate what you see to real-world circuits, since the Q2 crossover is pretty complex. but once you're done, you WILL notice an improvement! Army is right that they don't make drop-in replacements for the big silver woofer capacitors, but it's pretty easy to put a couple new bipolar electrolytics in parallel (the values then add directly). if you'd like, i can pretty quickly put together a parts list from Parts Express and Madisound - it would be similar to what i recently did on my QLS1s. you can feel free to change it up however you'd like, of course, but i think it represents a pretty good price-to-performance ratio.
And let me add, this question of should I refurb my xovers has plagued me for years. This is more exciting then learning how to replace surrounds....
