Hi Don,
The manual for the Onkyo, which can be found here, does not appear to specify the levels of the pre-outs. So I'm not sure where you found the 1 volt number, and I'm also not sure that it can be interpreted properly without specifications that allow it to be related to the signal level coming in from the source. For instance, a specification on the gain of the preamp section, or else a specification that the 1 volt output corresponds to some number of millivolts in.
If indeed the maximum output of the preamp section is only 1 volt, that would reduce your 225W amplifier (with 2 volt input sensitivity) to a (225/2squared) = 56W amplifier.
However, I suspect that is not the case, and perhaps the 1 volt pre-out spec you saw somewhere corresponds to a 200mv input, that being the input sensitivity spec that is indicated in the manual for the Onkyo (meaning the input voltage to the Onkyo's line-level inputs that will result in its own power amplifier being driven to full power). If so, and if your source is a cdp having the 2 volt full scale output that is common, you would be able to put 10 volts into the Nak with the volume control at maximum!
Regards,
-- Al
The manual for the Onkyo, which can be found here, does not appear to specify the levels of the pre-outs. So I'm not sure where you found the 1 volt number, and I'm also not sure that it can be interpreted properly without specifications that allow it to be related to the signal level coming in from the source. For instance, a specification on the gain of the preamp section, or else a specification that the 1 volt output corresponds to some number of millivolts in.
If indeed the maximum output of the preamp section is only 1 volt, that would reduce your 225W amplifier (with 2 volt input sensitivity) to a (225/2squared) = 56W amplifier.
However, I suspect that is not the case, and perhaps the 1 volt pre-out spec you saw somewhere corresponds to a 200mv input, that being the input sensitivity spec that is indicated in the manual for the Onkyo (meaning the input voltage to the Onkyo's line-level inputs that will result in its own power amplifier being driven to full power). If so, and if your source is a cdp having the 2 volt full scale output that is common, you would be able to put 10 volts into the Nak with the volume control at maximum!
Regards,
-- Al