Home Theater & Stereo Setup. Kef R2 Center Speaker

Gradually proceeding in my configuration.
Amp: Sunfire Signature
Preamp/Processor: Classe Sigma MK1
Amp: Rotel Rkb-8100
Songs Node2i
Front Speakers: Kef Q900
Audio speaker: Kef R2 C.
RearBack Martin Logan motion 35xti.
Elevation: Jamo border.
Earphone: Skull Candy.