I have an Onkyo RZ730 running in a 7.1.2 configuration. This AV has pre-outs that can feed a a 5.1 setup (or more but I don't know or care). What happens to the internal channel amplifiers when a pre-out is used e.g. for the FL/FR and for the sub anyway? Are the amp circuits switched off and the transformer has more reserves for the remaining channels? I am thinking about adding 3 mono-amps to feed Center and surround L/R.
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Onkyo RZ 730: dumb question maybe...
- Thread starter KMM
- Start date
The only time the amplifier "flips off" speaker outputs is with speaker config in the setup process (Ex: Tell you amp you have 5 speakers hooked up) and the DSP modes (Ex: 2 channel modes). Lets say you tell the amp your going to use all speaker outputs, but actually only hook up 2 speakers. Those 2 speakers gets all the power that the amp can provide (At least they should). If you use up all the available speaker outputs, then the power is divided even more.
I do know that some amps still output preamps alongside the regular speaker outputs (At the same time).
I do know that some amps still output preamps alongside the regular speaker outputs (At the same time).
DVDdoug
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They probably aren't switched-off but with nothing connected no current is flowing out so (essentially) no power is being consumed.* That would mean less power is "pulled" from the power supply. That MAY allow more power to the other channels but it shouldn't be significant.
With a "perfect" power it supply wouldn't make any difference. The ideal power supply would provide full-constant voltage to all amplifier-channels, with whatever current they need at any time. With a weak or poorly regulated power supply the voltage will "sag" when more current is drawn.
* Wattage is calculated as Voltage x Current, and with infinite resistance no current flows. It's the same with the power-outlets in your house. The voltage is always present but current only flows (and power consumed) when something is plugged-in and turned-on.
With a "perfect" power it supply wouldn't make any difference. The ideal power supply would provide full-constant voltage to all amplifier-channels, with whatever current they need at any time. With a weak or poorly regulated power supply the voltage will "sag" when more current is drawn.
* Wattage is calculated as Voltage x Current, and with infinite resistance no current flows. It's the same with the power-outlets in your house. The voltage is always present but current only flows (and power consumed) when something is plugged-in and turned-on.
- Thread Starter
- #4
Thank you folks. I am happy that you confirmed what I assumed to be the case. The remaining AV amps just idle and consume practically no power. Now it is up to me to decide on the 'value' of adding three mono amps in comparison to the internal AV amps.
