Class A 30 Watt Amps: Are they enough to drive my book shelfs?

I just bought that same amp here. I have Sonus faber Chameleon B's, 4 ohm 87 db, and was worried about driving them. But I can tell you it drives them well beyond my listening needs and never once has left Class A. Fantastic amp.

Would Mario Andretti enter a scooter race?

What I suggest sinc3 I use Stand mounts sometimes is a very good Subwoofer like the SVS -sb3000 which is superb and not that expensive ,it allows your speakers ,as well as your Amplifier to run much more efficient from 70 hz or so on down the sub handles all the heavy duty current , 30 wpc in class A ,no sweat.
i run a 25 watt  pass Labs at 14 ftaway  into the mid 90 dB range with 4 ohm 86 dB Loudspeakers with my Svs 3000 sub.

I have a Pass Aleph 30 powering a pair of Kef Q100’s. More than enough power for me. I also use a powered sub to fill out the low end. 

I believe John Atkinson (Stereophile) measured the Pass Labs 25 watt amp at 80+ watts in to 8 ohms, and 130 watts in to 4 ohms.. The amp in question should have no problem with the KEFs.