Passive volume control with secondary un-attenuated output?

Newbie post, so please be gentle! OK, I have titled this as a question but understand that it must be possible due to this item - https://www.tisburyaudio.co.uk/mini-passive-preamplifier.

Just to clarify:
1) This is just for a small second bedroom system, so not really wanting to push it too loud or spend silly money.
2) I need (well, would like) to use this to feed a small power amp via the attenuated output and a headphone amp via the unaffected output.

Unfortunately, being a bear of very little brain, I have yet to work out exactly how this is achieved. I have made a few straightforward passive volume controls in the past for various projects & initially thought that I could simply piggyback the input straight to an output (electrically, the equivalent of using a Y-cable splitter) but, of course, having assembled it all, turning the pot did affect this output, certainly towards the quieter end.

(Of course, I realise that I could add a switch to run one or t'other, but the Tisbury does not need this.)

Any help would be most welcomed & thanks in advance.

Tim
 
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