in my case for music I gained 5 db's about. in my large space I needed max performance. i have 2 amps bridged...this allows for flexibility in the future...can use them for surround chennels or whatnot if i get upgrade itis.
Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300 LG oled c9 77
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS, Audioengine A2+
Subs: Rythmik FV25HP, Rythmik FV15HP, Velodyne HGS 12, Velodyne VA1512