Al,
Thanks much for your response.
The story behind my getting the Onkyo pre-out specs is long and convoluted. I too noticed that this spec was not in the manual (I have the hard copy version), nor was it published on Onkyo's website page for the TX-NR807 receiver. When I called Onkyo tech support, the first rep didn't know what it was, but he talked to someone else who supposedly did. Here's what this effort yielded ... they stated it was "less than 1 volt but greater than 300 mV", and surprisingly that this "was not exact" ... and there was no impedance info to be had. I then followed up with a couple of emails to Onkyo customer support and they came back with the 1 volt and 470 ohm pre-out information. Now whether that latter into is actually correct or not, I cannot vouch for, but it's all I have to go on.
And I understand what you're saying about the lack of addition info to make the Onkyo pre-out output spec more meaningful. For example, the second input sensitivity spec for my Nak amp is 140 mV at 50k ohms (1 watt output). Anyway, the Nak CA-7A control amplifier that is currently hooked up to my Nak amp has an output level/impedance of 2.0 volts at 1,000 ohms, so as one wouldn't be surprised coming from the same manufacturer/model line, they are both matched to each other from an output/input voltage perspective.
In any regard, I also heard from someone that since the Onkyo TX-NR807 is a THX Select 2 Plus certified receiver, that THX certification specs demand that pre-amp pre-outs need to meet 2 volts. However, I have not been able to confirm this elsewhere, so unless you know that off-hand, I tend to not trust that info.
So, what do you suggest? Just hook my Nak up to the Onkyo pre-outs and see if it sounds OK and I'm hopefully not running the volume up inordinately high? Or if needed, get one of the input matching transformer units and see if that corrects the voltage mismatch issue (should it turn out to be a problem)?
Please let me know.
Thanks again,
Don
Thanks much for your response.
The story behind my getting the Onkyo pre-out specs is long and convoluted. I too noticed that this spec was not in the manual (I have the hard copy version), nor was it published on Onkyo's website page for the TX-NR807 receiver. When I called Onkyo tech support, the first rep didn't know what it was, but he talked to someone else who supposedly did. Here's what this effort yielded ... they stated it was "less than 1 volt but greater than 300 mV", and surprisingly that this "was not exact" ... and there was no impedance info to be had. I then followed up with a couple of emails to Onkyo customer support and they came back with the 1 volt and 470 ohm pre-out information. Now whether that latter into is actually correct or not, I cannot vouch for, but it's all I have to go on.
And I understand what you're saying about the lack of addition info to make the Onkyo pre-out output spec more meaningful. For example, the second input sensitivity spec for my Nak amp is 140 mV at 50k ohms (1 watt output). Anyway, the Nak CA-7A control amplifier that is currently hooked up to my Nak amp has an output level/impedance of 2.0 volts at 1,000 ohms, so as one wouldn't be surprised coming from the same manufacturer/model line, they are both matched to each other from an output/input voltage perspective.
In any regard, I also heard from someone that since the Onkyo TX-NR807 is a THX Select 2 Plus certified receiver, that THX certification specs demand that pre-amp pre-outs need to meet 2 volts. However, I have not been able to confirm this elsewhere, so unless you know that off-hand, I tend to not trust that info.
So, what do you suggest? Just hook my Nak up to the Onkyo pre-outs and see if it sounds OK and I'm hopefully not running the volume up inordinately high? Or if needed, get one of the input matching transformer units and see if that corrects the voltage mismatch issue (should it turn out to be a problem)?
Please let me know.
Thanks again,
Don
