Why does it matter if the volume knob is set at 7? 7 is completely arbitrary.
Assuming your source has a fairly normal output voltage, your preamp should have plenty of gain to drive your amplifier to full power.
The real question is, at maximum volume, is your amp + preamp combination able to drive the speakers to the loudest you ever care to listen to?
If so, there is no problem.
Assuming your source has a fairly normal output voltage, your preamp should have plenty of gain to drive your amplifier to full power.
The real question is, at maximum volume, is your amp + preamp combination able to drive the speakers to the loudest you ever care to listen to?
If so, there is no problem.