The REL R-505 represents the first use of digital Amplifiers; REL having determined that until recently Class-D amps did not offer sufficient control to meet standards. However, recent advances in the state of the Amplifier art have resulted in a range of Amplifiers that demonstrate excellent speed and control, especially in the low bass. When partnered with new drivers that are higher in performance, yet lighter in weight than their predecessors, the result is a new level of performance for the category.


The REL R-505 is not a traditional Sub Woofer, but rather true sub-bass system. The REL R-Series is designed to augment the performance of 'full range' Speaker systems and to provide linear response down to below 20Hz. Properly set-up and positioned, they will take advantage of physics and room acoustics to provide deep pressurization as no other subwoofer can. Unique to the REL are its connectivity options.