2 - 16 ohms Bookshelf speakers?

I'm afraid I don't understand your question.

If you were asking for an amplifier that's able to drive speakers rated at 2 ohms and/or 16 ohms impedance, I'd understand.

Or if you were asking for bookshelf speakers that had an impedance of 2 ohms, or of 16 ohms, I'd understand (though I wouldn't have an answer for you).

Of if you were asking for a bookshelf speaker that could be driven by 2 watts and up to 16 watts, I'd understand.

But "ohms" is a unit of resistance or impedance; you cannot "drive" anything with 2 ohms, nor with 16 ohms. You can "drive" speakers with watts, or with volts (customarily, we use "watts" when we speak of driving loudspeakers).

Maybe I'm not understanding your question. Could you phrase it another way, and I'll try again?

Thanks!

Your question doesn't quite make any sense...

let me reformulate - supposing I have 2 amplifiers that one of them works in 2 ohms and another one in 16 ohms, and I want to use both of them (of course not in the same time) with the same pair of Bookshelf speakers.

Which speakers are so flexible to be driven by amplifiers @ 2 ohms and 16 ohms?

Make sense?

Thank you