Does my amp have enough juice to power my speakers?

For easy to drive speakers, say high sensitivity 90? and 8 ohm or higher one can use even a flea watt amp for great success. A great many horn loud speakers (Klipsch and Volti Audio) sound terrific with low watt amps. I have that EXACT amp (LM audio 216ia) and driving Vandersteen 2 CE Sig II speakers at moderate volumes and it sounds great to me. I think in your case, an amp with quality watts (more than you have), would most likely make your speakers sound better, but only if you play them loud. I would think your amp is just fine for those speakers...but only you can be the judge. Do you have a quality source, good room acoustics and damping?

@arctikdeth Easy there feller. 20Watts on 99dB horns will trounce your noisy Harleys.

@noromance,  please ship me what you have!’(mushrooms, skunk, sense, etc etc)
 My McCormack dna-750s’ monos
 energy rc-70’s
 Motörhead, slayer, flotsam & Jetsam, sodom, mercyful fate. 

 It don’t. Get much better.
i heard those klipsch horns and their 105db@1W/M
hurts me to think about it.

 ;)
 warmer speaker with high power is the ticket brother

There is no such thing as a speaker needing power. Speakers don't need any power at all. Listeners do. Its you that needs the power, and the louder you like your music the more power you need. Regardless of the speaker, or its sensitivity, or any of that.

Regarding power, the one question you need to really ask yourself is: If the first watt isn't any good, why would you want 200 more of them?

84dB sensitivity needs power.

To do some math:

Placing it in-room would lead to about a 2dB boost (3dB for speakers with deeper bass), making it 86dB. If you sit 12ft away, that’s about a 7dB loss, so now it’s 79dB. If you wanted peaks of 100dB, you would need ~125W.

If you sit 6ft away and wanted peaks of 100dB, you would need ~65W.