tube preamp mod for bass bypass to ss power IN?

[awangotango]

I use a SS power amp

I sometimes use a tube pre in front of it.

I like what the tubes do to the mids and highs, but not the lows.

QUESTION:
Is there any device or diagram for a unit (or a mod to my marantz 7 tube clone pre) that would filter lows so they pass directly to the power amp in but still respond to tube pre's volume control?

 

[awangotango]

the innards: no tone controls, just volume and selector.

 

[awangotango]

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