Question about Pioneer VSX-817-S
Testing your amp at max with the speakers disconnected will not play a factor because there is no power being drawn so the amp is not being used. Those speakers are rated 90db and really pound but also draw a ton of amps. The key thing here is to keep it cool, cool, cool. Put a fan on it and keep your receiver on a hard surface with nothing stacked on top or anywhere within a foot of it. Keeping it cool will help prevent overloads or (protection mode). Back it down every now and them and give the system a rest for a few minutes. Double check the negative and positive connection on the speakers to the receiver. We all have hooked them up backwards sometime and this will have the effect you are expressing. What is the phase set at on your receiver? Set it down to "0" and go up to where it sounds best without distortion. One more very important thing. What is the Ohm switch on your receiver set at? Put the switch on 8 Ohm even though your running 6 Ohm speakers. That switch only steps down your voltage feed to the power selections which will hamper the overall dynamics and fidelity of your receiver. This switch is really not even necessary. Putting that switch at 8 Ohms will give you more headway and aid in keeping your amp cool.
Posted on Mar 24, 2011
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Posted on Jan 02, 2017
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Aug 15, 2016 | Pioneer Audio/Video Home Theater Remote...
on Jun 22, 2009 | Pioneer VSX-D608 Receiver
Apr 10, 2011 | Pioneer VSX-817-S
Generally speaking, an amp protects itself from heat, shorts and overloads.
Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.
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