Question about Amplifiers & Preamps
I am using a Denon 3300 in a 2-channel setup and find the fan (which begins cycling on and off around 45 minutes after startup) to be really annoying. In addition the metal case clicks as it expands with the heat. My question is this: If I attach a power amp to the "pre-out" connection and use only the 3300 pre-amp, will the heat/fan issues go away? Would the pre-amp section generate enough heat to trigger the fan? Thanks for any input.
The preamp section will not generate a great deal of heat. Try it and see...leave the amp running with signal going through it and the prein-out jumpers removed and see what noises it makes over time
Posted on Jan 12, 2008
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Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; 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 and competent hands-on tech.
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