Pro-ject stereo box e and KlipschR50M

Hi guys. I want to build my first hi-fi system from scratch. I checked many reviews but still have some questions. I want to build a system for listening cds. I will use it in the small living room approx 25 square meters. I prefer listening to music in the evenings on low volumes. My preferred genres are rock (Pink Floyd, Soen, Perfect circle) and electronic (Massive Attack, Moby, etc). I want to start with Pro-ject Stereo box E, Pro-ject CD box E and pair of Klipsch R50M. Later I am going to extend my setup with active sub from Klipsch. Questions: this amplifier has specs of 20 watt per 8 Ohms. Will it be enough powered for my use case?

There is no equalizer on the amplifier. Could it be an issue with these speakers? Thank u in advance!