[Sub-10 / Sub-12 / RPW-10 Repair Blog]

Welcome, sorry but i can't help with finding your problem.
 
But if you wanted to keep it you could use a outbard or stand alone amp, no reason to ditch the sub. A regular amp could be hooked up and just put the bad amp back in it's place so the cabinet space stays the same. 
 
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I found the issue. The crossover knob seems to have intermittent connection. If I press it down and up while turning, the signal is alive again.


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[Sub-10 / Sub-12 / RPW-10 Repair Blog]

I have a SUB-10 with no sound.  The LFE signal appears to be working as the Auto-On is going from sleep mode to on when receiver seems to be sending a signal.  It was working for some time after the replaced the capacitor and added thermal paste circled in green. 
 

I am trying to troubleshoot myself for a learning opportunity.  
 

testing resistance on sub yields 5.3ohms, is this acceptable?  I believe it’s an 8ohm sub and thought that I should be around 6.4ohms or 20% of 8ohms. 
 

just trying to see if I can do use basic tools to trace root cause. 
 

I really like the sub and would love to avoid ditching it.