The 840W is rated for 800W bridged into 4 ohms and the sub will help, particularly with an active xover. When you get close to the edge, even the wrong speaker cables can push it over. Depends on the speaker load... resistive, capacitive, impedance...
How about power? That's 2 X 2400W (at ear shattering levels), or 40A @ 120V.
Doubling and quadrupling isn't much of a absolute SPL increase but that's not what it's about. Closer to the point is whether that much power, without the low bass requirement, will benefit your speakers. I could understand for Maggies or Carver A3's.
How about power? That's 2 X 2400W (at ear shattering levels), or 40A @ 120V.
Doubling and quadrupling isn't much of a absolute SPL increase but that's not what it's about. Closer to the point is whether that much power, without the low bass requirement, will benefit your speakers. I could understand for Maggies or Carver A3's.