Because RELs are engineered to produce foundational low bass, it is beneficial to place pairs into front structural corners, immediately behind the main front speakers. Turned inward toward the center of the room to a position that points directly or almost directly at the prime listening location. For stereo pairs, this basic approach of corner placement may work well. However, for larger RELs, especially in small or medium rooms, it may work best to place the subwoofers in close proximity to the main speakers, just behind and to the outside of main speakers. Doing so ensures that these larger RELs and the main speakers act like a single unified whole, and with 2 large RELs there is almost certain to be sufficient output, making corner placement unnecessary.
* These are recommended best practices for positioning a REL Subwoofer, always refine placement and angle by ear.
** To obtain optimal performance from a REL subwoofer and extend the performance of your speakers, your main speakers must be setup properly. Always follow the setup instructions from your speaker manufacturer first, before setting up your REL.