Will I blow anything up?

Almarg, are you out there? What's your take on this.

Rgds,Clay

There will be lower voltage at the 4 ohm tap, so the woofer/tweeter gain match will be wrong.

Almarg, are you out there? What's your take on this.

LOL!

I agree with Eldartford. There may be other sonic issues as well, but I'm not going to take the time to think about them because the reason he cited makes the whole idea a non-starter by itself.

Best,
-- Al

You would really need to find out what the the impedances are for the woofer and the mid/highs separately. This configuration is similar to bi-amping as I’m assuming you are removing any jumpers at the speakers?

Did some digging; this out of an owners manual for the VAC renaissance 30/30-

"A word about impedance matching - If you bi-wire your system (run separate speaker leads from the amplifier to the high and low frequency transducers)you may discover that two different taps work best. For example, with early production Martin Logan Sequel II we find that the bass speaker is best matched with the 4 ohm tap, while the electrostatic panel is best controlled by the 2 ohm tap. On later production Sequels we use the 4 ohm connection to both drivers."

I'd recommend contacting the amp / speaker manufacturers before getting creative just to be on the safe side. Good luck