My room is not so big – 20″ x 14″. RELs are placed asymmetrically because I could not fit them otherwise. RELs have unique design where you connect amplifier’s output taps directly to Subs so SL and subs receive identical signal. Subs use only signal not power from amplifiers. REL 212/SX are active design powered with 1000w each. On the back of the subs you have 2 knobs to adjust crossover point and volume output – very simple to use.