Thats standard for most mid to high end receivers. Onkyo calls it "double bass"
For a receiver right now the Onkyo 809 is the vest bang for buck out there as it has THX certification, Audyssey MultEQ XT, HQV Vida VHD1900 Video Processor in tandum with the Marvell Qdeo Video Chip for 4K Upscaling and Processing, independant ISF video calibration for each input and much more.