Current, Amperage

Already seeing a bunch of confusion....

91.5 dB is NOT the 1 watt efficiency of those Focals at one watt. That's their sensitivity to 2.83 volts. I'm sure they've got that characteristic Focal upper bass impedance dip down around 3.5 ohm. That means their efficiency drops off, which you'd hear if you used a current source amplifier, which very few are. So, when figuring out what kind of wattage you really need to drive them, you should figure how much current that load will draw at the voltage required to produce the dB you want at your listening distance. At 12 feet that going to be a good bit more than 8 watts. 

Most focals require extra current in the 100Hz range due to relatively low 3 ish impedance. Not an amp killing situation, but I do find that they sound a little soft in the bass unless the amp is stiff.

Don't need a high power ratimg, but they will are relatively "discrimimating" when it comes to amplifier current delkvery. An unfortunate trait for otherwise highly praised and affordable line

@Erik_Squires 
this is really was the essance of my original question. 
So, how much ‘current’ do I need? And, is this a rating or spec that is provided? 

I have 936's which are a bit harder to drive than the 826's. I'm using a modified First Watt F5. It does 64 watts and drives them very nicely. A good quality solid state class A rating of 25 to 30 watts will drive them just fine. Class AB, I'd go 75 watts at the least. My 52 watt Marantz got real thin sounding when asked to make good volume. 

i have a mcintosh mc602 power amp. it has 150 amperes per chanell. where does this stand in power amps?