As a National Guard Vet. Why is there no benefits for us who served? I personally have served 14 years in the Guard,with 2 Honorable discharges and cannot recieve any compensasion for serving because I didn't serve overseas,or because I didn't go active. Please take time and discuss this matter with me! thank you a worried Vet.
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As these units get old, the solder joints can start to fail. Also, come of the components are getting tired. If you have no electronics experience, bring this to a servicer. I typically overhaul these units for about $100 plus parts. In most cases, the parts costis less than $20. These are solid units and you can probably get another 30 years out of it.
Part of the overhaul should be reseating all of the output transistors and replacing all of the heatsink compound as well as cleaning out all of the pots and switches.
Home-theatre receivers don't have microphone inputs. If you want to use the receiver as an amplifier in PA system, you need to use some kind of mic pre-amp or a mixer with mic inputs. For PA mixer is needed anyway almost every time and all mixers have at least one mic input (with a pre-amp). Mixers have line-level output(s), which you can connect to the analog input of receiver. Using receiver as an amp in PA has advantage that you have 5 channel amp. When using high sensitive PA speakers (as oposed to less sensitive Hi-fi home speakers), you can get good performance with the power rating of receiver. You could even use 2 separate channels for subwoofers and 2 channels for satelite speakers - but for that you would need a receiver with 5.1 analog inputs and special device called crossover which would divide the output from mixer into low-frequency signal and high-frequency signal which you would then connect to the front and rear analog inputs. But with RX-V365 you can use only 2 channels with analog input
Generally speaking it is always better to have separate amp for subwoofers and separate for higher frequencies. But why do you want to power PA speakers with home/hifi receivers? You don't 90% of features which receivers have. Look for some PA amplifiers and you will get much more power at similar price. Also most receivers have only about 80 - 100 W per channel and this is NOT continuos power over all 5 or 7 channels! Only the most expensive receivers can do that. You can have 100 W for any channel, but not 100 W to all channels at the same time (spikes yes, but not continuously). And 100 W is very little for your PA speakers. You should buy amp which has the same rating per channel as your speaker continuous power handling. So if your speaker has rating of 300 W cont. / 500 W spikes, buy amp which has at least 300 W, but 500 W would be better.
The 2 speaker jacks are wired in parallel. If your subs are 4 ohm rated the amp is seeing a 2 ohm load and may be trying to protect itself - hence the red light. I would suggest you unplug 1 of the subs and see if the problem goes away. You may have a problem with one of your subs. This amp is probably not the best choice for such demanding work as it is not fan cooled. Good luck.