This is a fantastic speaker system. I still use the system I bought new decades ago and although I don't want to discourage you, this really isn't a system for beginners.
But if you're determined, here are a few things to watch for.
Woofers: The columns are designed to be used only with the Infinity IRS Servo unit and if that's not included - or it's not working properly - then the woofers are only going to disappoint. Check the woofers themselves for problems with the foam surround; these woofers need a re-foam about every 10 years or so. Check the operation of the servo circuit by having the servo and LF amplifier on, and pressing gently on the "control woofer," which is the second one down from the top. The column's other woofers should move in and out in sympathy with the control woofer.
EMIMs/EMITs: Where to start? The EMIMs are especially prone to problems, including broken magnets and broken traces on the diaphragm. Both problems are repairable, but not easily. New replacements cannot be found, although you can occasionally find used ones. Be particularly alert to substitute parts or kludged modifications made to these drivers. They are almost always awful, although there is a guy in Australia who has made replacement EMIM diaphragms that work.
I do not think that your Sunfire amplifier is likely to work well with this system. I find the best results are with a SS amp on the bottom (400 watts a channel at 4 ohms or better) and tubes on top. There is a very low impedance dip on the mid panels, and that's a problem for some amplifiers.
But if you're determined, here are a few things to watch for.
Woofers: The columns are designed to be used only with the Infinity IRS Servo unit and if that's not included - or it's not working properly - then the woofers are only going to disappoint. Check the woofers themselves for problems with the foam surround; these woofers need a re-foam about every 10 years or so. Check the operation of the servo circuit by having the servo and LF amplifier on, and pressing gently on the "control woofer," which is the second one down from the top. The column's other woofers should move in and out in sympathy with the control woofer.
EMIMs/EMITs: Where to start? The EMIMs are especially prone to problems, including broken magnets and broken traces on the diaphragm. Both problems are repairable, but not easily. New replacements cannot be found, although you can occasionally find used ones. Be particularly alert to substitute parts or kludged modifications made to these drivers. They are almost always awful, although there is a guy in Australia who has made replacement EMIM diaphragms that work.
I do not think that your Sunfire amplifier is likely to work well with this system. I find the best results are with a SS amp on the bottom (400 watts a channel at 4 ohms or better) and tubes on top. There is a very low impedance dip on the mid panels, and that's a problem for some amplifiers.