Thorin Guidry

Greetings...I have a klipsch RW8 sub that will power on...and I can hear a slight "bump" from the driver when it turns off, but I'm not getting any sound from my receiver once it's hooked up. I have a secondary sub that works fine connected the same way. I've tried troubleshooting as far as I can...but taking the amp out, I don't see anything apparently wrong with it...the capacitors are not bulged and I don't see any burnt areas. Any suggestions where I could send my plate amp off to get repaired, or failing that were I could get a replacement? Any help would be greatly appreciated. My standby sub is just not as good!