Elektor Q-Watt & Preamplifier 2012 levels

[calpe]

A query on the output level of the Preamplifier 2012 (Elektor April, May & June 2012) & input level on the Elektor Q-Watt Power Amp (Elektor September 2013).

As there appears to be quite a high level output from the Preamplifier 2012, if it's connected to the Q-Watt then there appears to be a 'mismatch' of levels.

Can something be done to keep them in line, otherwise i fear with the Preamplifiers volume turned up to a high level it could over-drive the Q-Watt?

 

[PRR]

Use the Volume knob. That's what it is for.

 

[adason]

Or do not use preamp at all. Just a pot infront of the amp.

 

[calpe]

Knob

Use the Volume knob. That's what it is for.

What do you expect a knob to do?
Perhaps it depends on the colour of the knob!

 

[calpe]

Pot?

Or do not use preamp at all. Just a pot infront of the amp.

So how should the pot be wired?
What value would we be talking about?
Impedance matching?